lib: add internal object pool API and use it; adapt plugins/tests
[babeltrace.git] / tests / lib / test_ctf_writer.c
index 67adaa6773088daf38fc8483e69410c80af48898..928ff982183f7f5b2f2716779d35c5cf2d508a60 100644 (file)
@@ -1,9 +1,9 @@
 /*
- * test-ctf-writer.c
+ * test_ctf_writer.c
  *
  * CTF Writer test
  *
- * Copyright 2013 - 2015 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright 2013 - 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#define _GNU_SOURCE
 #include <babeltrace/ctf-writer/writer.h>
 #include <babeltrace/ctf-writer/clock.h>
 #include <babeltrace/ctf-writer/stream.h>
 #include <babeltrace/ctf-writer/event.h>
 #include <babeltrace/ctf-writer/event-types.h>
 #include <babeltrace/ctf-writer/event-fields.h>
-#include <babeltrace/ctf-ir/stream-class.h>
+#include <babeltrace/ctf-writer/stream-class.h>
+#include <babeltrace/ctf-writer/trace.h>
+#include <babeltrace/ref.h>
 #include <babeltrace/ctf/events.h>
-#include <babeltrace/objects.h>
+#include <babeltrace/values.h>
+#include <glib.h>
 #include <unistd.h>
-#include <stdlib.h>
+#include <babeltrace/compat/stdlib-internal.h>
 #include <stdio.h>
-#include <sys/utsname.h>
-#include <babeltrace/compat/limits.h>
+#include <babeltrace/compat/limits-internal.h>
+#include <babeltrace/compat/stdio-internal.h>
 #include <string.h>
 #include <assert.h>
-#include <sys/wait.h>
 #include <fcntl.h>
-#include <dirent.h>
 #include "tap/tap.h"
 #include <math.h>
 #include <float.h>
+#include "common.h"
 
 #define METADATA_LINE_SIZE 512
 #define SEQUENCE_TEST_LENGTH 10
 #define ARRAY_TEST_LENGTH 5
-#define PACKET_RESIZE_TEST_LENGTH 100000
+#define PACKET_RESIZE_TEST_DEF_LENGTH 100000
 
 #define DEFAULT_CLOCK_FREQ 1000000000
 #define DEFAULT_CLOCK_PRECISION 1
 #define DEFAULT_CLOCK_OFFSET_S 0
 #define DEFAULT_CLOCK_IS_ABSOLUTE 0
 #define DEFAULT_CLOCK_TIME 0
+#define DEFAULT_CLOCK_VALUE 0
 
-static uint64_t current_time = 42;
+#define NR_TESTS 346
+
+struct bt_utsname {
+       char sysname[BABELTRACE_HOST_NAME_MAX];
+       char nodename[BABELTRACE_HOST_NAME_MAX];
+       char release[BABELTRACE_HOST_NAME_MAX];
+       char version[BABELTRACE_HOST_NAME_MAX];
+       char machine[BABELTRACE_HOST_NAME_MAX];
+};
+
+static int64_t current_time = 42;
+static unsigned int packet_resize_test_length = PACKET_RESIZE_TEST_DEF_LENGTH;
 
 /* Return 1 if uuids match, zero if different. */
+static
 int uuid_match(const unsigned char *uuid_a, const unsigned char *uuid_b)
 {
        int ret = 0;
@@ -78,204 +92,50 @@ end:
        return ret;
 }
 
-void validate_metadata(char *parser_path, char *metadata_path)
+static
+void validate_trace(char *parser_path, char *trace_path)
 {
        int ret = 0;
-       char parser_output_path[] = "/tmp/parser_output_XXXXXX";
-       int parser_output_fd = -1, metadata_fd = -1;
+       gint exit_status;
+       char *argv[] = {parser_path, trace_path, "-o", "dummy", NULL};
 
-       if (!metadata_path) {
+       if (!parser_path || !trace_path) {
                ret = -1;
                goto result;
        }
 
-       parser_output_fd = mkstemp(parser_output_path);
-       metadata_fd = open(metadata_path, O_RDONLY);
-
-       unlink(parser_output_path);
-
-       if (parser_output_fd == -1 || metadata_fd == -1) {
-               diag("Failed create temporary files for metadata parsing.");
+       if (!g_spawn_sync(NULL,
+                       argv,
+                       NULL,
+                       G_SPAWN_STDOUT_TO_DEV_NULL,
+                       NULL,
+                       NULL,
+                       NULL,
+                       NULL,
+                       &exit_status,
+                       NULL)) {
+               diag("Failed to spawn babeltrace.");
                ret = -1;
                goto result;
        }
 
-       pid_t pid = fork();
-       if (pid) {
-               int status = 0;
-               waitpid(pid, &status, 0);
-               ret = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
-       } else {
-               /* ctf-parser-test expects a metadata string on stdin. */
-               ret = dup2(metadata_fd, STDIN_FILENO);
-               if (ret < 0) {
-                       perror("# dup2 metadata_fd to STDIN");
-                       goto result;
-               }
-
-               ret = dup2(parser_output_fd, STDOUT_FILENO);
-               if (ret < 0) {
-                       perror("# dup2 parser_output_fd to STDOUT");
-                       goto result;
-               }
-
-               ret = dup2(parser_output_fd, STDERR_FILENO);
-               if (ret < 0) {
-                       perror("# dup2 parser_output_fd to STDERR");
-                       goto result;
-               }
-
-               execl(parser_path, "ctf-parser-test", NULL);
-               perror("# Could not launch the ctf metadata parser process");
-               exit(-1);
-       }
-result:
-       ok(ret == 0, "Metadata string is valid");
-
-       if (ret && metadata_fd >= 0 && parser_output_fd >= 0) {
-               char *line;
-               size_t len = METADATA_LINE_SIZE;
-               FILE *metadata_fp = NULL, *parser_output_fp = NULL;
-
-               metadata_fp = fdopen(metadata_fd, "r");
-               if (!metadata_fp) {
-                       perror("fdopen on metadata_fd");
-                       goto close_fp;
-               }
-               metadata_fd = -1;
-
-               parser_output_fp = fdopen(parser_output_fd, "r");
-               if (!parser_output_fp) {
-                       perror("fdopen on parser_output_fd");
-                       goto close_fp;
-               }
-               parser_output_fd = -1;
-
-               line = malloc(len);
-               if (!line) {
-                       diag("malloc failure");
-               }
-
-               rewind(metadata_fp);
-
-               /* Output the metadata and parser output as diagnostic */
-               while (getline(&line, &len, metadata_fp) > 0) {
-                       fprintf(stderr, "# %s", line);
-               }
-
-               rewind(parser_output_fp);
-               while (getline(&line, &len, parser_output_fp) > 0) {
-                       fprintf(stderr, "# %s", line);
-               }
-
-               free(line);
-close_fp:
-               if (metadata_fp) {
-                       if (fclose(metadata_fp)) {
-                               diag("fclose failure");
-                       }
-               }
-               if (parser_output_fp) {
-                       if (fclose(parser_output_fp)) {
-                               diag("fclose failure");
-                       }
-               }
-       }
-
-       if (parser_output_fd >= 0) {
-               if (close(parser_output_fd)) {
-                       diag("close error");
-               }
-       }
-       if (metadata_fd >= 0) {
-               if (close(metadata_fd)) {
-                       diag("close error");
-               }
-       }
-}
+       /* Replace by g_spawn_check_exit_status when we require glib >= 2.34 */
+#ifdef G_OS_UNIX
+       ret = WIFEXITED(exit_status) ? WEXITSTATUS(exit_status) : -1;
+#else
+       ret = exit_status;
+#endif
 
-void validate_trace(char *parser_path, char *trace_path)
-{
-       int ret = 0;
-       char babeltrace_output_path[] = "/tmp/babeltrace_output_XXXXXX";
-       int babeltrace_output_fd = -1;
-
-       if (!trace_path) {
-               ret = -1;
+       if (ret != 0) {
+               diag("Babeltrace returned an error.");
                goto result;
        }
 
-       babeltrace_output_fd = mkstemp(babeltrace_output_path);
-       unlink(babeltrace_output_path);
-
-       if (babeltrace_output_fd == -1) {
-               diag("Failed to create a temporary file for trace parsing.");
-               ret = -1;
-               goto result;
-       }
-
-       pid_t pid = fork();
-       if (pid) {
-               int status = 0;
-               waitpid(pid, &status, 0);
-               ret = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
-       } else {
-               ret = dup2(babeltrace_output_fd, STDOUT_FILENO);
-               if (ret < 0) {
-                       perror("# dup2 babeltrace_output_fd to STDOUT");
-                       goto result;
-               }
-
-               ret = dup2(babeltrace_output_fd, STDERR_FILENO);
-               if (ret < 0) {
-                       perror("# dup2 babeltrace_output_fd to STDERR");
-                       goto result;
-               }
-
-               execl(parser_path, "babeltrace", trace_path, NULL);
-               perror("# Could not launch the babeltrace process");
-               exit(-1);
-       }
 result:
        ok(ret == 0, "Babeltrace could read the resulting trace");
-
-       if (ret && babeltrace_output_fd >= 0) {
-               char *line;
-               size_t len = METADATA_LINE_SIZE;
-               FILE *babeltrace_output_fp = NULL;
-
-               babeltrace_output_fp = fdopen(babeltrace_output_fd, "r");
-               if (!babeltrace_output_fp) {
-                       perror("fdopen on babeltrace_output_fd");
-                       goto close_fp;
-               }
-               babeltrace_output_fd = -1;
-
-               line = malloc(len);
-               if (!line) {
-                       diag("malloc error");
-               }
-               rewind(babeltrace_output_fp);
-               while (getline(&line, &len, babeltrace_output_fp) > 0) {
-                       diag("%s", line);
-               }
-
-               free(line);
-close_fp:
-               if (babeltrace_output_fp) {
-                       if (fclose(babeltrace_output_fp)) {
-                               diag("fclose error");
-                       }
-               }
-       }
-
-       if (babeltrace_output_fd >= 0) {
-               if (close(babeltrace_output_fd)) {
-                       diag("close error");
-               }
-       }
 }
 
+static
 void append_simple_event(struct bt_ctf_stream_class *stream_class,
                struct bt_ctf_stream *stream, struct bt_ctf_clock *clock)
 {
@@ -293,6 +153,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
                bt_ctf_field_type_enumeration_create(uint_12_type);
        struct bt_ctf_field_type *event_context_type =
                bt_ctf_field_type_structure_create();
+       struct bt_ctf_field_type *event_payload_type = NULL;
        struct bt_ctf_field_type *returned_type;
        struct bt_ctf_event *simple_event;
        struct bt_ctf_field *integer_field;
@@ -308,7 +169,6 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        double ret_double;
        int64_t ret_range_start_int64_t, ret_range_end_int64_t;
        uint64_t ret_range_start_uint64_t, ret_range_end_uint64_t;
-       struct bt_ctf_clock *ret_clock;
        struct bt_ctf_event_class *ret_event_class;
        struct bt_ctf_field *packet_context;
        struct bt_ctf_field *packet_context_field;
@@ -316,23 +176,26 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        struct bt_ctf_field *stream_event_context_field;
        struct bt_ctf_field *event_context;
        struct bt_ctf_field *event_context_field;
+       struct bt_ctf_field_type *ep_integer_field_type = NULL;
+       struct bt_ctf_field_type *ep_enum_field_type = NULL;
+       struct bt_ctf_field_type *ep_enum_field_unsigned_type = NULL;
+       struct bt_ctf_field_type_enumeration_mapping_iterator *iter = NULL;
+       int ret;
 
        ok(uint_12_type, "Create an unsigned integer type");
 
-       bt_ctf_field_type_integer_set_signed(int_64_type, 1);
+       ok(!bt_ctf_field_type_integer_set_signed(int_64_type, 1),
+               "Set signed 64 bit integer signedness to true");
        ok(int_64_type, "Create a signed integer type");
        enum_type = bt_ctf_field_type_enumeration_create(int_64_type);
 
-       returned_type = bt_ctf_field_type_enumeration_get_container_type(enum_type);
-       ok(returned_type == int_64_type, "bt_ctf_field_type_enumeration_get_container_type returns the right type");
-       ok(!bt_ctf_field_type_enumeration_get_container_type(NULL), "bt_ctf_field_type_enumeration_get_container_type handles NULL correctly");
+       returned_type = bt_ctf_field_type_enumeration_get_container_field_type(enum_type);
+       ok(returned_type == int_64_type, "bt_ctf_field_type_enumeration_get_container_field_type returns the right type");
        ok(!bt_ctf_field_type_enumeration_create(enum_type),
                "bt_ctf_field_enumeration_type_create rejects non-integer container field types");
-       bt_ctf_field_type_put(returned_type);
+       bt_put(returned_type);
 
        bt_ctf_field_type_set_alignment(float_type, 32);
-       ok(bt_ctf_field_type_get_alignment(NULL) < 0,
-               "bt_ctf_field_type_get_alignment handles NULL correctly");
        ok(bt_ctf_field_type_get_alignment(float_type) == 32,
                "bt_ctf_field_type_get_alignment returns a correct value");
 
@@ -341,10 +204,6 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        ok(bt_ctf_field_type_floating_point_set_mantissa_digits(float_type, 53) == 0,
                "Set a floating point type's mantissa digit count");
 
-       ok(bt_ctf_field_type_floating_point_get_exponent_digits(NULL) < 0,
-               "bt_ctf_field_type_floating_point_get_exponent_digits handles NULL properly");
-       ok(bt_ctf_field_type_floating_point_get_mantissa_digits(NULL) < 0,
-               "bt_ctf_field_type_floating_point_get_mantissa_digits handles NULL properly");
        ok(bt_ctf_field_type_floating_point_get_exponent_digits(float_type) == 11,
                "bt_ctf_field_type_floating_point_get_exponent_digits returns the correct value");
        ok(bt_ctf_field_type_floating_point_get_mantissa_digits(float_type) == 53,
@@ -365,91 +224,77 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        bt_ctf_field_type_enumeration_add_mapping(enum_type, mapping_name_test,
                42, 42);
        ok(bt_ctf_field_type_enumeration_add_mapping(enum_type, mapping_name_test,
-               43, 51), "bt_ctf_field_type_enumeration_add_mapping rejects duplicate mapping names");
+               43, 51) == 0, "bt_ctf_field_type_enumeration_add_mapping accepts duplicate mapping names");
        ok(bt_ctf_field_type_enumeration_add_mapping(enum_type, "something",
-               -500, -400), "bt_ctf_field_type_enumeration_add_mapping rejects overlapping enum entries");
+               -500, -400) == 0, "bt_ctf_field_type_enumeration_add_mapping accepts overlapping enum entries");
        ok(bt_ctf_field_type_enumeration_add_mapping(enum_type, mapping_name_test,
                -54, -55), "bt_ctf_field_type_enumeration_add_mapping rejects mapping where end < start");
        bt_ctf_field_type_enumeration_add_mapping(enum_type, "another entry", -42000, -13000);
 
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_value(NULL, -42) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_value handles a NULL field type correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_value(enum_type, 1000000) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_value handles invalid values correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_value(enum_type, -55) == 1,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_value returns the correct index");
-
        ok(bt_ctf_event_class_add_field(simple_event_class, enum_type,
                "enum_field") == 0, "Add signed enumeration field to event");
 
-       ok(bt_ctf_field_type_enumeration_get_mapping(NULL, 0, &ret_char,
-               &ret_range_start_int64_t, &ret_range_end_int64_t) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping handles a NULL enumeration correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping(enum_type, 0, NULL,
-               &ret_range_start_int64_t, &ret_range_end_int64_t) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping handles a NULL string correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping(enum_type, 0, &ret_char,
-               NULL, &ret_range_end_int64_t) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping handles a NULL start correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping(enum_type, 0, &ret_char,
-               &ret_range_start_int64_t, NULL) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping handles a NULL end correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping(enum_type, 5, &ret_char,
+       ok(bt_ctf_field_type_enumeration_signed_get_mapping_by_index(enum_type, 0, NULL,
+               &ret_range_start_int64_t, &ret_range_end_int64_t) == 0,
+               "bt_ctf_field_type_enumeration_signed_get_mapping_by_index handles a NULL string correctly");
+       ok(bt_ctf_field_type_enumeration_signed_get_mapping_by_index(enum_type, 0, &ret_char,
+               NULL, &ret_range_end_int64_t) == 0,
+               "bt_ctf_field_type_enumeration_signed_get_mapping_by_index handles a NULL start correctly");
+       ok(bt_ctf_field_type_enumeration_signed_get_mapping_by_index(enum_type, 0, &ret_char,
+               &ret_range_start_int64_t, NULL) == 0,
+               "bt_ctf_field_type_enumeration_signed_get_mapping_by_index handles a NULL end correctly");
+       /* Assumes entries are sorted by range_start values. */
+       ok(bt_ctf_field_type_enumeration_signed_get_mapping_by_index(enum_type, 6, &ret_char,
                &ret_range_start_int64_t, &ret_range_end_int64_t) == 0,
-               "bt_ctf_field_type_enumeration_get_mapping returns a value");
+               "bt_ctf_field_type_enumeration_signed_get_mapping_by_index returns a value");
        ok(!strcmp(ret_char, mapping_name_test),
-               "bt_ctf_field_type_enumeration_get_mapping returns a correct mapping name");
+               "bt_ctf_field_type_enumeration_signed_get_mapping_by_index returns a correct mapping name");
        ok(ret_range_start_int64_t == 42,
-               "bt_ctf_field_type_enumeration_get_mapping returns a correct mapping start");
+               "bt_ctf_field_type_enumeration_signed_get_mapping_by_index returns a correct mapping start");
        ok(ret_range_end_int64_t == 42,
-               "bt_ctf_field_type_enumeration_get_mapping returns a correct mapping end");
+               "bt_ctf_field_type_enumeration_signed_get_mapping_by_index returns a correct mapping end");
 
-       ok(bt_ctf_field_type_enumeration_add_mapping_unsigned(enum_type_unsigned,
+       ok(bt_ctf_field_type_enumeration_unsigned_add_mapping(enum_type_unsigned,
                "escaping; \"test\"", 0, 0) == 0,
-               "bt_ctf_field_type_enumeration_add_mapping_unsigned accepts enumeration mapping strings containing quotes");
-       ok(bt_ctf_field_type_enumeration_add_mapping_unsigned(enum_type_unsigned,
+               "bt_ctf_field_type_enumeration_unsigned_add_mapping accepts enumeration mapping strings containing quotes");
+       ok(bt_ctf_field_type_enumeration_unsigned_add_mapping(enum_type_unsigned,
                "\tanother \'escaping\'\n test\"", 1, 4) == 0,
-               "bt_ctf_field_type_enumeration_add_mapping_unsigned accepts enumeration mapping strings containing special characters");
-       ok(bt_ctf_field_type_enumeration_add_mapping_unsigned(enum_type_unsigned,
+               "bt_ctf_field_type_enumeration_unsigned_add_mapping accepts enumeration mapping strings containing special characters");
+       ok(bt_ctf_field_type_enumeration_unsigned_add_mapping(enum_type_unsigned,
                "event clock int float", 5, 22) == 0,
-               "bt_ctf_field_type_enumeration_add_mapping_unsigned accepts enumeration mapping strings containing reserved keywords");
-       bt_ctf_field_type_enumeration_add_mapping_unsigned(enum_type_unsigned, mapping_name_test,
-               42, 42);
-       ok(bt_ctf_field_type_enumeration_add_mapping_unsigned(enum_type_unsigned, mapping_name_test,
-               43, 51), "bt_ctf_field_type_enumeration_add_mapping_unsigned rejects duplicate mapping names");
-       ok(bt_ctf_field_type_enumeration_add_mapping_unsigned(enum_type_unsigned, "something",
-               7, 8), "bt_ctf_field_type_enumeration_add_mapping_unsigned rejects overlapping enum entries");
-       ok(bt_ctf_field_type_enumeration_add_mapping_unsigned(enum_type_unsigned, mapping_name_test,
-               55, 54), "bt_ctf_field_type_enumeration_add_mapping_unsigned rejects mapping where end < start");
+               "bt_ctf_field_type_enumeration_unsigned_add_mapping accepts enumeration mapping strings containing reserved keywords");
+       ok(bt_ctf_field_type_enumeration_unsigned_add_mapping(enum_type_unsigned, mapping_name_test,
+               42, 42) == 0, "bt_ctf_field_type_enumeration_unsigned_add_mapping accepts single-value ranges");
+       ok(bt_ctf_field_type_enumeration_unsigned_add_mapping(enum_type_unsigned, mapping_name_test,
+               43, 51) == 0, "bt_ctf_field_type_enumeration_unsigned_add_mapping accepts duplicate mapping names");
+       ok(bt_ctf_field_type_enumeration_unsigned_add_mapping(enum_type_unsigned, "something",
+               7, 8) == 0, "bt_ctf_field_type_enumeration_unsigned_add_mapping accepts overlapping enum entries");
+       ok(bt_ctf_field_type_enumeration_unsigned_add_mapping(enum_type_unsigned, mapping_name_test,
+               55, 54), "bt_ctf_field_type_enumeration_unsigned_add_mapping rejects mapping where end < start");
        ok(bt_ctf_event_class_add_field(simple_event_class, enum_type_unsigned,
                "enum_field_unsigned") == 0, "Add unsigned enumeration field to event");
 
-       ok(bt_ctf_field_type_enumeration_get_mapping_count(NULL) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_count handles NULL correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_count(enum_type_unsigned) == 4,
+       ok(bt_ctf_field_type_enumeration_get_mapping_count(enum_type_unsigned) == 6,
                "bt_ctf_field_type_enumeration_get_mapping_count returns the correct value");
 
-       ok(bt_ctf_field_type_enumeration_get_mapping_unsigned(NULL, 0, &ret_char,
-               &ret_range_start_uint64_t, &ret_range_end_uint64_t) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned handles a NULL enumeration correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_unsigned(enum_type_unsigned, 0, NULL,
-               &ret_range_start_uint64_t, &ret_range_end_uint64_t) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned handles a NULL string correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_unsigned(enum_type_unsigned, 0, &ret_char,
-               NULL, &ret_range_end_uint64_t) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned handles a NULL start correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_unsigned(enum_type_unsigned, 0, &ret_char,
-               &ret_range_start_uint64_t, NULL) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned handles a NULL end correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_unsigned(enum_type_unsigned, 3, &ret_char,
+       ok(bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index(enum_type_unsigned, 0, NULL,
+               &ret_range_start_uint64_t, &ret_range_end_uint64_t) == 0,
+               "bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index handles a NULL string correctly");
+       ok(bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index(enum_type_unsigned, 0, &ret_char,
+               NULL, &ret_range_end_uint64_t) == 0,
+               "bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index handles a NULL start correctly");
+       ok(bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index(enum_type_unsigned, 0, &ret_char,
+               &ret_range_start_uint64_t, NULL) == 0,
+               "bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index handles a NULL end correctly");
+       ok(bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index(enum_type_unsigned, 4, &ret_char,
                &ret_range_start_uint64_t, &ret_range_end_uint64_t) == 0,
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned returns a value");
+               "bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index returns a value");
        ok(!strcmp(ret_char, mapping_name_test),
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned returns a correct mapping name");
+               "bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index returns a correct mapping name");
        ok(ret_range_start_uint64_t == 42,
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned returns a correct mapping start");
+               "bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index returns a correct mapping start");
        ok(ret_range_end_uint64_t == 42,
-               "bt_ctf_field_type_enumeration_get_mapping_unsigned returns a correct mapping end");
+               "bt_ctf_field_type_enumeration_unsigned_get_mapping_by_index returns a correct mapping end");
 
        bt_ctf_event_class_add_field(simple_event_class, uint_12_type,
                "integer_field");
@@ -458,218 +303,188 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
 
        assert(!bt_ctf_event_class_set_id(simple_event_class, 13));
 
-       /* Set an event context type which will contain a single integer*/
+       /* Set an event context type which will contain a single integer*/
        ok(!bt_ctf_field_type_structure_add_field(event_context_type, uint_12_type,
                "event_specific_context"),
                "Add event specific context field");
-       ok(bt_ctf_event_class_get_context_type(NULL) == NULL,
-               "bt_ctf_event_class_get_context_type handles NULL correctly");
-       ok(bt_ctf_event_class_get_context_type(simple_event_class) == NULL,
-               "bt_ctf_event_class_get_context_type returns NULL when no event context type is set");
-
-       ok(bt_ctf_event_class_set_context_type(simple_event_class, NULL) < 0,
-               "bt_ctf_event_class_set_context_type handles a NULL context type correctly");
-       ok(bt_ctf_event_class_set_context_type(NULL, event_context_type) < 0,
-               "bt_ctf_event_class_set_context_type handles a NULL event class correctly");
-       ok(!bt_ctf_event_class_set_context_type(simple_event_class, event_context_type),
+
+       ok(bt_ctf_event_class_set_context_field_type(NULL, event_context_type) < 0,
+               "bt_ctf_event_class_set_context_field_type handles a NULL event class correctly");
+       ok(!bt_ctf_event_class_set_context_field_type(simple_event_class, event_context_type),
                "Set an event class' context type successfully");
-       returned_type = bt_ctf_event_class_get_context_type(simple_event_class);
+       returned_type = bt_ctf_event_class_get_context_field_type(simple_event_class);
        ok(returned_type == event_context_type,
-               "bt_ctf_event_class_get_context_type returns the appropriate type");
-       bt_ctf_field_type_put(returned_type);
+               "bt_ctf_event_class_get_context_field_type returns the appropriate type");
+       bt_put(returned_type);
 
-       bt_ctf_stream_class_add_event_class(stream_class, simple_event_class);
+       ok(!bt_ctf_stream_class_add_event_class(stream_class, simple_event_class),
+               "Adding simple event class to stream class");
+
+       /*
+        * bt_ctf_stream_class_add_event_class() copies the field types
+        * of simple_event_class, so we retrieve the new ones to create
+        * the appropriate fields.
+        */
+       BT_PUT(event_context_type);
+       BT_PUT(event_payload_type);
+       event_payload_type = bt_ctf_event_class_get_payload_field_type(
+               simple_event_class);
+       assert(event_payload_type);
+       event_context_type = bt_ctf_event_class_get_context_field_type(
+               simple_event_class);
+       assert(event_context_type);
+       ep_integer_field_type =
+               bt_ctf_field_type_structure_get_field_type_by_name(
+                       event_payload_type, "integer_field");
+       assert(ep_integer_field_type);
+       ep_enum_field_type =
+               bt_ctf_field_type_structure_get_field_type_by_name(
+                       event_payload_type, "enum_field");
+       assert(ep_enum_field_type);
+       ep_enum_field_unsigned_type =
+               bt_ctf_field_type_structure_get_field_type_by_name(
+                       event_payload_type, "enum_field_unsigned");
+       assert(ep_enum_field_unsigned_type);
 
-       ok(bt_ctf_stream_class_get_event_class_count(NULL) < 0,
-               "bt_ctf_stream_class_get_event_class_count handles NULL correctly");
        ok(bt_ctf_stream_class_get_event_class_count(stream_class) == 1,
                "bt_ctf_stream_class_get_event_class_count returns a correct number of event classes");
-       ok(bt_ctf_stream_class_get_event_class(NULL, 0) == NULL,
-               "bt_ctf_stream_class_get_event_class handles NULL correctly");
-       ok(bt_ctf_stream_class_get_event_class(stream_class, 8724) == NULL,
-               "bt_ctf_stream_class_get_event_class handles invalid indexes correctly");
-       ret_event_class = bt_ctf_stream_class_get_event_class(stream_class, 0);
+       ret_event_class = bt_ctf_stream_class_get_event_class_by_index(stream_class, 0);
        ok(ret_event_class == simple_event_class,
                "bt_ctf_stream_class_get_event_class returns the correct event class");
-       bt_ctf_event_class_put(ret_event_class);
-       ok(!bt_ctf_stream_class_get_event_class_by_id(NULL, 0),
-               "bt_ctf_stream_class_get_event_class_by_id handles NULL correctly");
+       bt_put(ret_event_class);
        ok(!bt_ctf_stream_class_get_event_class_by_id(stream_class, 2),
                "bt_ctf_stream_class_get_event_class_by_id returns NULL when the requested ID doesn't exist");
        ret_event_class =
                bt_ctf_stream_class_get_event_class_by_id(stream_class, 13);
        ok(ret_event_class == simple_event_class,
                "bt_ctf_stream_class_get_event_class_by_id returns a correct event class");
-       bt_ctf_event_class_put(ret_event_class);
-
-       ok(bt_ctf_stream_class_get_event_class_by_name(NULL, "some event name") == NULL,
-               "bt_ctf_stream_class_get_event_class_by_name handles a NULL stream class correctly");
-       ok(bt_ctf_stream_class_get_event_class_by_name(stream_class, NULL) == NULL,
-               "bt_ctf_stream_class_get_event_class_by_name handles a NULL event class name correctly");
-       ok(bt_ctf_stream_class_get_event_class_by_name(stream_class, "some event name") == NULL,
-               "bt_ctf_stream_class_get_event_class_by_name handles non-existing event class names correctly");
-       ret_event_class = bt_ctf_stream_class_get_event_class_by_name(stream_class, "Simple Event");
-       ok(ret_event_class == simple_event_class,
-               "bt_ctf_stream_class_get_event_class_by_name returns a correct event class");
-       bt_ctf_event_class_put(ret_event_class);
+       bt_put(ret_event_class);
 
        simple_event = bt_ctf_event_create(simple_event_class);
        ok(simple_event,
                "Instantiate an event containing a single integer field");
 
-       ok(bt_ctf_event_get_clock(NULL) == NULL,
-               "bt_ctf_event_get_clock handles NULL correctly");
-       ret_clock = bt_ctf_event_get_clock(simple_event);
-       ok(ret_clock == clock,
-               "bt_ctf_event_get_clock returns a correct clock");
-       bt_ctf_clock_put(clock);
-
-       integer_field = bt_ctf_field_create(uint_12_type);
-       bt_ctf_field_unsigned_integer_set_value(integer_field, 42);
+       integer_field = bt_ctf_field_create(ep_integer_field_type);
+       bt_ctf_field_integer_unsigned_set_value(integer_field, 42);
        ok(bt_ctf_event_set_payload(simple_event, "integer_field",
                integer_field) == 0, "Use bt_ctf_event_set_payload to set a manually allocated field");
 
        float_field = bt_ctf_event_get_payload(simple_event, "float_field");
-       ok(bt_ctf_field_floating_point_get_value(float_field, &ret_double),
-               "bt_ctf_field_floating_point_get_value fails on an unset float field");
        bt_ctf_field_floating_point_set_value(float_field, double_test_value);
-       ok(bt_ctf_field_floating_point_get_value(NULL, &ret_double),
-               "bt_ctf_field_floating_point_get_value properly handles a NULL field");
-       ok(bt_ctf_field_floating_point_get_value(float_field, NULL),
-               "bt_ctf_field_floating_point_get_value properly handles a NULL return value pointer");
        ok(!bt_ctf_field_floating_point_get_value(float_field, &ret_double),
                "bt_ctf_field_floating_point_get_value returns a double value");
        ok(fabs(ret_double - double_test_value) <= DBL_EPSILON,
                "bt_ctf_field_floating_point_get_value returns a correct value");
 
-       enum_field = bt_ctf_field_create(enum_type);
-       ret_char = bt_ctf_field_enumeration_get_mapping_name(NULL);
-       ok(!ret_char, "bt_ctf_field_enumeration_get_mapping_name handles NULL correctly");
-       ret_char = bt_ctf_field_enumeration_get_mapping_name(enum_field);
-       ok(!ret_char, "bt_ctf_field_enumeration_get_mapping_name returns NULL if the enumeration's container field is unset");
-       enum_container_field = bt_ctf_field_enumeration_get_container(
-               enum_field);
-       ok(bt_ctf_field_signed_integer_set_value(
+       enum_field = bt_ctf_field_create(ep_enum_field_type);
+       assert(enum_field);
+
+       enum_container_field = bt_ctf_field_enumeration_get_container(enum_field);
+       ok(bt_ctf_field_integer_signed_set_value(
                enum_container_field, -42) == 0,
                "Set signed enumeration container value");
-       ret_char = bt_ctf_field_enumeration_get_mapping_name(enum_field);
-       ok(!strcmp(ret_char, mapping_name_negative_test),
-               "bt_ctf_field_enumeration_get_mapping_name returns the correct mapping name with an signed container");
-       bt_ctf_event_set_payload(simple_event, "enum_field", enum_field);
+       ret = bt_ctf_event_set_payload(simple_event, "enum_field", enum_field);
+       assert(!ret);
+       BT_PUT(iter);
 
-       enum_field_unsigned = bt_ctf_field_create(enum_type_unsigned);
+       enum_field_unsigned = bt_ctf_field_create(ep_enum_field_unsigned_type);
+       assert(enum_field_unsigned);
        enum_container_field_unsigned = bt_ctf_field_enumeration_get_container(
                enum_field_unsigned);
-       ok(bt_ctf_field_unsigned_integer_set_value(
+       ok(bt_ctf_field_integer_unsigned_set_value(
                enum_container_field_unsigned, 42) == 0,
                "Set unsigned enumeration container value");
-       bt_ctf_event_set_payload(simple_event, "enum_field_unsigned",
+       ret = bt_ctf_event_set_payload(simple_event, "enum_field_unsigned",
                enum_field_unsigned);
-       ret_char = bt_ctf_field_enumeration_get_mapping_name(enum_field_unsigned);
-       ok(ret_char && !strcmp(ret_char, mapping_name_test),
-               "bt_ctf_field_enumeration_get_mapping_name returns the correct mapping name with an unsigned container");
+       assert(!ret);
 
        ok(bt_ctf_clock_set_time(clock, current_time) == 0, "Set clock time");
 
        /* Populate stream event context */
-       stream_event_context = bt_ctf_stream_get_event_context(stream);
-       stream_event_context_field = bt_ctf_field_structure_get_field(
+       stream_event_context =
+               bt_ctf_event_get_stream_event_context(simple_event);
+       assert(stream_event_context);
+       stream_event_context_field = bt_ctf_field_structure_get_field_by_name(
                stream_event_context, "common_event_context");
-       bt_ctf_field_unsigned_integer_set_value(stream_event_context_field, 42);
+       bt_ctf_field_integer_unsigned_set_value(stream_event_context_field, 42);
 
        /* Populate the event's context */
-       ok(bt_ctf_event_get_event_context(NULL) == NULL,
-               "bt_ctf_event_get_event_context handles NULL correctly");
-       event_context = bt_ctf_event_get_event_context(simple_event);
+       event_context = bt_ctf_event_get_context(simple_event);
        ok(event_context,
-               "bt_ctf_event_get_event_context returns a field");
+               "bt_ctf_event_get_context returns a field");
        returned_type = bt_ctf_field_get_type(event_context);
        ok(returned_type == event_context_type,
-               "bt_ctf_event_get_event_context returns a field of the appropriate type");
-       event_context_field = bt_ctf_field_structure_get_field(event_context,
+               "bt_ctf_event_get_context returns a field of the appropriate type");
+       event_context_field = bt_ctf_field_structure_get_field_by_name(event_context,
                "event_specific_context");
-       ok(!bt_ctf_field_unsigned_integer_set_value(event_context_field, 1234),
+       ok(!bt_ctf_field_integer_unsigned_set_value(event_context_field, 1234),
                "Successfully set an event context's value");
-       ok(bt_ctf_event_set_event_context(NULL, event_context) < 0,
-               "bt_ctf_event_set_event_context handles a NULL event correctly");
-       ok(bt_ctf_event_set_event_context(simple_event, NULL) < 0,
-               "bt_ctf_event_set_event_context handles a NULL event context correctly");
-       ok(bt_ctf_event_set_event_context(simple_event, event_context_field) < 0,
-               "bt_ctf_event_set_event_context rejects a context of the wrong type");
-       ok(!bt_ctf_event_set_event_context(simple_event, event_context),
+       ok(!bt_ctf_event_set_context(simple_event, event_context),
                "Set an event context successfully");
 
        ok(bt_ctf_stream_append_event(stream, simple_event) == 0,
                "Append simple event to trace stream");
 
-       ok(bt_ctf_stream_get_packet_context(NULL) == NULL,
-               "bt_ctf_stream_get_packet_context handles NULL correctly");
        packet_context = bt_ctf_stream_get_packet_context(stream);
        ok(packet_context,
                "bt_ctf_stream_get_packet_context returns a packet context");
 
-       packet_context_field = bt_ctf_field_structure_get_field(packet_context,
+       packet_context_field = bt_ctf_field_structure_get_field_by_name(packet_context,
                "packet_size");
        ok(packet_context_field,
                "Packet context contains the default packet_size field.");
-       bt_ctf_field_put(packet_context_field);
-       packet_context_field = bt_ctf_field_structure_get_field(packet_context,
+       bt_put(packet_context_field);
+       packet_context_field = bt_ctf_field_structure_get_field_by_name(packet_context,
                "custom_packet_context_field");
-       ok(bt_ctf_field_unsigned_integer_set_value(packet_context_field, 8) == 0,
+       ok(bt_ctf_field_integer_unsigned_set_value(packet_context_field, 8) == 0,
                "Custom packet context field value successfully set.");
 
-       ok(bt_ctf_stream_set_packet_context(NULL, packet_context_field) < 0,
-               "bt_ctf_stream_set_packet_context handles a NULL stream correctly");
-       ok(bt_ctf_stream_set_packet_context(stream, NULL) < 0,
-               "bt_ctf_stream_set_packet_context handles a NULL packet context correctly");
        ok(bt_ctf_stream_set_packet_context(stream, packet_context) == 0,
                "Successfully set a stream's packet context");
 
        ok(bt_ctf_stream_flush(stream) == 0,
                "Flush trace stream with one event");
 
-       bt_ctf_event_class_put(simple_event_class);
-       bt_ctf_event_put(simple_event);
-       bt_ctf_field_type_put(uint_12_type);
-       bt_ctf_field_type_put(int_64_type);
-       bt_ctf_field_type_put(float_type);
-       bt_ctf_field_type_put(enum_type);
-       bt_ctf_field_type_put(enum_type_unsigned);
-       bt_ctf_field_type_put(returned_type);
-       bt_ctf_field_type_put(event_context_type);
-       bt_ctf_field_put(integer_field);
-       bt_ctf_field_put(float_field);
-       bt_ctf_field_put(enum_field);
-       bt_ctf_field_put(enum_field_unsigned);
-       bt_ctf_field_put(enum_container_field);
-       bt_ctf_field_put(enum_container_field_unsigned);
-       bt_ctf_field_put(packet_context);
-       bt_ctf_field_put(packet_context_field);
-       bt_ctf_field_put(stream_event_context);
-       bt_ctf_field_put(stream_event_context_field);
-       bt_ctf_field_put(event_context);
-       bt_ctf_field_put(event_context_field);
+       bt_put(simple_event_class);
+       bt_put(simple_event);
+       bt_put(uint_12_type);
+       bt_put(int_64_type);
+       bt_put(float_type);
+       bt_put(enum_type);
+       bt_put(enum_type_unsigned);
+       bt_put(returned_type);
+       bt_put(event_context_type);
+       bt_put(integer_field);
+       bt_put(float_field);
+       bt_put(enum_field);
+       bt_put(enum_field_unsigned);
+       bt_put(enum_container_field);
+       bt_put(enum_container_field_unsigned);
+       bt_put(packet_context);
+       bt_put(packet_context_field);
+       bt_put(stream_event_context);
+       bt_put(stream_event_context_field);
+       bt_put(event_context);
+       bt_put(event_context_field);
+       bt_put(event_payload_type);
+       bt_put(ep_integer_field_type);
+       bt_put(ep_enum_field_type);
+       bt_put(ep_enum_field_unsigned_type);
+       bt_put(iter);
 }
 
+static
 void append_complex_event(struct bt_ctf_stream_class *stream_class,
                struct bt_ctf_stream *stream, struct bt_ctf_clock *clock)
 {
-       struct event_class_attrs_counts {
-               int id;
-               int name;
-               int loglevel;
-               int modelemfuri;
-               int unknown;
-       } attrs_count;
-
        int i;
-       int ret;
-       int64_t int64_value;
        struct event_class_attrs_counts ;
        const char *complex_test_event_string = "Complex Test Event";
        const char *test_string_1 = "Test ";
-       const char *test_string_2 = "string";
-       const char *test_string_cat = "Test string";
+       const char *test_string_2 = "string ";
+       const char *test_string_3 = "abcdefghi";
+       const char *test_string_4 = "abcd\0efg\0hi";
+       const char *test_string_cat = "Test string abcdeefg";
        struct bt_ctf_field_type *uint_35_type =
                bt_ctf_field_type_integer_create(35);
        struct bt_ctf_field_type *int_16_type =
@@ -695,43 +510,52 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        struct bt_ctf_field *uint_35_field, *int_16_field, *a_string_field,
                *inner_structure_field, *complex_structure_field,
                *a_sequence_field, *enum_variant_field, *enum_container_field,
-               *variant_field, *an_array_field, *ret_field;
+               *variant_field, *an_array_field, *stream_event_ctx_field,
+               *stream_event_ctx_int_field;
        uint64_t ret_unsigned_int;
        int64_t ret_signed_int;
        const char *ret_string;
        struct bt_ctf_stream_class *ret_stream_class;
        struct bt_ctf_event_class *ret_event_class;
        struct bt_ctf_field *packet_context, *packet_context_field;
-       struct bt_object *obj;
 
-       bt_ctf_field_type_set_alignment(int_16_type, 32);
-       bt_ctf_field_type_integer_set_signed(int_16_type, 1);
-       bt_ctf_field_type_integer_set_base(uint_35_type,
-               BT_CTF_INTEGER_BASE_HEXADECIMAL);
+       ok(bt_ctf_field_type_set_alignment(int_16_type, 0),
+               "bt_ctf_field_type_set_alignment handles 0-alignment correctly");
+       ok(bt_ctf_field_type_set_alignment(int_16_type, 3),
+               "bt_ctf_field_type_set_alignment handles wrong alignment correctly (3)");
+       ok(bt_ctf_field_type_set_alignment(int_16_type, 24),
+               "bt_ctf_field_type_set_alignment handles wrong alignment correctly (24)");
+       ok(!bt_ctf_field_type_set_alignment(int_16_type, 4),
+               "bt_ctf_field_type_set_alignment handles correct alignment correctly (4)");
+       ok(!bt_ctf_field_type_set_alignment(int_16_type, 32),
+               "Set alignment of signed 16 bit integer to 32");
+       ok(!bt_ctf_field_type_integer_set_signed(int_16_type, 1),
+               "Set integer signedness to true");
+       ok(!bt_ctf_field_type_integer_set_base(uint_35_type,
+               BT_CTF_INTEGER_BASE_HEXADECIMAL),
+               "Set signed 16 bit integer base to hexadecimal");
 
        array_type = bt_ctf_field_type_array_create(int_16_type, ARRAY_TEST_LENGTH);
        sequence_type = bt_ctf_field_type_sequence_create(int_16_type,
                "seq_len");
 
-       ok(bt_ctf_field_type_array_get_element_type(NULL) == NULL,
-               "bt_ctf_field_type_array_get_element_type handles NULL correctly");
-       ret_field_type = bt_ctf_field_type_array_get_element_type(
+       ret_field_type = bt_ctf_field_type_array_get_element_field_type(
                array_type);
        ok(ret_field_type == int_16_type,
-               "bt_ctf_field_type_array_get_element_type returns the correct type");
-       bt_ctf_field_type_put(ret_field_type);
+               "bt_ctf_field_type_array_get_element_field_type returns the correct type");
+       bt_put(ret_field_type);
 
-       ok(bt_ctf_field_type_array_get_length(NULL) < 0,
-               "bt_ctf_field_type_array_get_length handles NULL correctly");
        ok(bt_ctf_field_type_array_get_length(array_type) == ARRAY_TEST_LENGTH,
                "bt_ctf_field_type_array_get_length returns the correct length");
 
-       bt_ctf_field_type_structure_add_field(inner_structure_type,
-               uint_35_type, "seq_len");
-       bt_ctf_field_type_structure_add_field(inner_structure_type,
-               sequence_type, "a_sequence");
-       bt_ctf_field_type_structure_add_field(inner_structure_type,
-               array_type, "an_array");
+       ok(bt_ctf_field_type_structure_add_field(inner_structure_type,
+               inner_structure_type, "yes"), "Cannot add self to structure");
+       ok(!bt_ctf_field_type_structure_add_field(inner_structure_type,
+               uint_35_type, "seq_len"), "Add seq_len field to inner structure");
+       ok(!bt_ctf_field_type_structure_add_field(inner_structure_type,
+               sequence_type, "a_sequence"), "Add a_sequence field to inner structure");
+       ok(!bt_ctf_field_type_structure_add_field(inner_structure_type,
+               array_type, "an_array"), "Add an_array field to inner structure");
 
        bt_ctf_field_type_enumeration_add_mapping(enum_variant_type,
                "UINT3_TYPE", 0, 0);
@@ -740,88 +564,57 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        bt_ctf_field_type_enumeration_add_mapping(enum_variant_type,
                "UINT35_TYPE", 2, 7);
 
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_name(NULL,
-               "INT16_TYPE") < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_name handles a NULL field type correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_name(
-               enum_variant_type, NULL) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_name handles a NULL name correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_name(
-               enum_variant_type, "INT16_TYPE") == 1,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_name returns the correct index");
-
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_unsigned_value(NULL, 1) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_unsigned_value handles a NULL field type correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_unsigned_value(enum_variant_type, -42) < 0,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_unsigned_value handles invalid values correctly");
-       ok(bt_ctf_field_type_enumeration_get_mapping_index_by_unsigned_value(enum_variant_type, 5) == 2,
-               "bt_ctf_field_type_enumeration_get_mapping_index_by_unsigned_value returns the correct index");
-
        ok(bt_ctf_field_type_variant_add_field(variant_type, uint_3_type,
                "An unknown entry"), "Reject a variant field based on an unknown tag value");
        ok(bt_ctf_field_type_variant_add_field(variant_type, uint_3_type,
                "UINT3_TYPE") == 0, "Add a field to a variant");
-       bt_ctf_field_type_variant_add_field(variant_type, int_16_type,
-               "INT16_TYPE");
-       bt_ctf_field_type_variant_add_field(variant_type, uint_35_type,
-               "UINT35_TYPE");
-
-       ok(bt_ctf_field_type_variant_get_tag_type(NULL) == NULL,
-               "bt_ctf_field_type_variant_get_tag_type handles NULL correctly");
-       ret_field_type = bt_ctf_field_type_variant_get_tag_type(variant_type);
+       ok(!bt_ctf_field_type_variant_add_field(variant_type, int_16_type,
+               "INT16_TYPE"), "Add INT16_TYPE field to variant");
+       ok(!bt_ctf_field_type_variant_add_field(variant_type, uint_35_type,
+               "UINT35_TYPE"), "Add UINT35_TYPE field to variant");
+
+       ret_field_type = bt_ctf_field_type_variant_get_tag_field_type(variant_type);
        ok(ret_field_type == enum_variant_type,
-               "bt_ctf_field_type_variant_get_tag_type returns a correct tag type");
-       bt_ctf_field_type_put(ret_field_type);
+               "bt_ctf_field_type_variant_get_tag_field_type returns a correct tag type");
+       bt_put(ret_field_type);
 
-       ok(bt_ctf_field_type_variant_get_tag_name(NULL) == NULL,
-               "bt_ctf_field_type_variant_get_tag_name handles NULL correctly");
        ret_string = bt_ctf_field_type_variant_get_tag_name(variant_type);
-       ok(!strcmp(ret_string, "variant_selector"),
+       ok(ret_string ? !strcmp(ret_string, "variant_selector") : 0,
                "bt_ctf_field_type_variant_get_tag_name returns the correct variant tag name");
-       ok(bt_ctf_field_type_variant_get_field_type_by_name(NULL,
-               "INT16_TYPE") == NULL,
-               "bt_ctf_field_type_variant_get_field_type_by_name handles a NULL variant_type correctly");
-       ok(bt_ctf_field_type_variant_get_field_type_by_name(variant_type,
-               NULL) == NULL,
-               "bt_ctf_field_type_variant_get_field_type_by_name handles a NULL field name correctly");
        ret_field_type = bt_ctf_field_type_variant_get_field_type_by_name(
                variant_type, "INT16_TYPE");
        ok(ret_field_type == int_16_type,
                "bt_ctf_field_type_variant_get_field_type_by_name returns a correct field type");
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(ret_field_type);
 
-       ok(bt_ctf_field_type_variant_get_field_count(NULL) < 0,
-               "bt_ctf_field_type_variant_get_field_count handles NULL correctly");
        ok(bt_ctf_field_type_variant_get_field_count(variant_type) == 3,
                "bt_ctf_field_type_variant_get_field_count returns the correct count");
 
-       ok(bt_ctf_field_type_variant_get_field(NULL, &ret_string, &ret_field_type, 0) < 0,
-               "bt_ctf_field_type_variant_get_field handles a NULL type correctly");
-       ok(bt_ctf_field_type_variant_get_field(variant_type, NULL, &ret_field_type, 0) < 0,
+       ok(bt_ctf_field_type_variant_get_field_by_index(variant_type, NULL, &ret_field_type, 0) == 0,
                "bt_ctf_field_type_variant_get_field handles a NULL field name correctly");
-       ok(bt_ctf_field_type_variant_get_field(variant_type, &ret_string, NULL, 0) < 0,
+       bt_put(ret_field_type);
+       ok(bt_ctf_field_type_variant_get_field_by_index(variant_type, &ret_string, NULL, 0) == 0,
                "bt_ctf_field_type_variant_get_field handles a NULL field type correctly");
-       ok(bt_ctf_field_type_variant_get_field(variant_type, &ret_string, &ret_field_type, 200) < 0,
-               "bt_ctf_field_type_variant_get_field handles an invalid index correctly");
-       ok(bt_ctf_field_type_variant_get_field(variant_type, &ret_string, &ret_field_type, 1) == 0,
+       ok(bt_ctf_field_type_variant_get_field_by_index(variant_type, &ret_string, &ret_field_type, 1) == 0,
                "bt_ctf_field_type_variant_get_field returns a field");
        ok(!strcmp("INT16_TYPE", ret_string),
                "bt_ctf_field_type_variant_get_field returns a correct field name");
        ok(ret_field_type == int_16_type,
                "bt_ctf_field_type_variant_get_field returns a correct field type");
-       bt_ctf_field_type_put(ret_field_type);
-
-       bt_ctf_field_type_structure_add_field(complex_structure_type,
-               enum_variant_type, "variant_selector");
-       bt_ctf_field_type_structure_add_field(complex_structure_type,
-               string_type, "a_string");
-       bt_ctf_field_type_structure_add_field(complex_structure_type,
-               variant_type, "variant_value");
-       bt_ctf_field_type_structure_add_field(complex_structure_type,
-               inner_structure_type, "inner_structure");
-
-       ok(bt_ctf_event_class_create("clock") == NULL,
-               "Reject creation of an event class with an illegal name");
+       bt_put(ret_field_type);
+
+       ok(!bt_ctf_field_type_structure_add_field(complex_structure_type,
+               enum_variant_type, "variant_selector"),
+               "Add variant_selector field to complex structure");
+       ok(!bt_ctf_field_type_structure_add_field(complex_structure_type,
+               string_type, "string"), "Add `string` field to complex structure");
+       ok(!bt_ctf_field_type_structure_add_field(complex_structure_type,
+               variant_type, "variant_value"),
+               "Add variant_value field to complex structure");
+       ok(!bt_ctf_field_type_structure_add_field(complex_structure_type,
+               inner_structure_type, "inner_structure"),
+               "Add inner_structure field to complex structure");
+
        event_class = bt_ctf_event_class_create(complex_test_event_string);
        ok(event_class, "Create an event class");
        ok(bt_ctf_event_class_add_field(event_class, uint_35_type, ""),
@@ -840,15 +633,11 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                "complex_structure") == 0,
                "Add composite structure to an event");
 
-       ok(bt_ctf_event_class_get_name(NULL) == NULL,
-               "bt_ctf_event_class_get_name handles NULL correctly");
        ret_string = bt_ctf_event_class_get_name(event_class);
        ok(!strcmp(ret_string, complex_test_event_string),
                "bt_ctf_event_class_get_name returns a correct name");
        ok(bt_ctf_event_class_get_id(event_class) < 0,
                "bt_ctf_event_class_get_id returns a negative value when not set");
-       ok(bt_ctf_event_class_get_id(NULL) < 0,
-               "bt_ctf_event_class_get_id handles NULL correctly");
        ok(bt_ctf_event_class_set_id(NULL, 42) < 0,
                "bt_ctf_event_class_set_id handles NULL correctly");
        ok(bt_ctf_event_class_set_id(event_class, 42) == 0,
@@ -857,112 +646,28 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                "bt_ctf_event_class_get_id returns the correct value");
 
        /* Test event class attributes */
-       assert(obj = bt_object_integer_create_init(15));
-       ok(bt_ctf_event_class_set_attribute(NULL, "id", obj),
-               "bt_ctf_event_class_set_attribute handles a NULL event class correctly");
-       ok(bt_ctf_event_class_set_attribute(event_class, NULL, obj),
-               "bt_ctf_event_class_set_attribute handles a NULL name correctly");
-       ok(bt_ctf_event_class_set_attribute(event_class, "id", NULL),
-               "bt_ctf_event_class_set_attribute handles a NULL value correctly");
-       assert(!bt_object_integer_set(obj, -3));
-       ok(bt_ctf_event_class_set_attribute(event_class, "id", obj),
-               "bt_ctf_event_class_set_attribute fails with a negative \"id\" attribute");
-       assert(!bt_object_integer_set(obj, 11));
-       ret = bt_ctf_event_class_set_attribute(event_class, "id", obj);
-       ok(!ret && bt_ctf_event_class_get_id(event_class) == 11,
-               "bt_ctf_event_class_set_attribute succeeds in replacing the existing \"id\" attribute");
-       ret = bt_ctf_event_class_set_attribute(event_class, "name", obj);
-       ret &= bt_ctf_event_class_set_attribute(event_class, "model.emf.uri", obj);
-       ok(ret,
-               "bt_ctf_event_class_set_attribute cannot set \"name\" or \"model.emf.uri\" to an integer value");
-       BT_OBJECT_PUT(obj);
-
-       obj = bt_object_integer_create_init(5);
-       assert(obj);
-       ok(!bt_ctf_event_class_set_attribute(event_class, "loglevel", obj),
-               "bt_ctf_event_class_set_attribute succeeds in setting the \"loglevel\" attribute");
-       BT_OBJECT_PUT(obj);
-       ok(!bt_ctf_event_class_get_attribute_value_by_name(NULL, "loglevel"),
-               "bt_ctf_event_class_get_attribute_value_by_name handles a NULL event class correctly");
-       ok(!bt_ctf_event_class_get_attribute_value_by_name(event_class, NULL),
-               "bt_ctf_event_class_get_attribute_value_by_name handles a NULL name correctly");
-       ok(!bt_ctf_event_class_get_attribute_value_by_name(event_class, "meow"),
-               "bt_ctf_event_class_get_attribute_value_by_name fails with a non-existing attribute name");
-       obj = bt_ctf_event_class_get_attribute_value_by_name(event_class,
-               "loglevel");
-       int64_value = 0;
-       ret = bt_object_integer_get(obj, &int64_value);
-       ok(obj && !ret && int64_value == 5,
-               "bt_ctf_event_class_get_attribute_value_by_name returns the correct value");
-       BT_OBJECT_PUT(obj);
-
-       assert(obj = bt_object_string_create_init("nu name"));
-       assert(!bt_ctf_event_class_set_attribute(event_class, "name", obj));
-       ret_string = bt_ctf_event_class_get_name(event_class);
-       ok(!strcmp(ret_string, "nu name"),
-               "bt_ctf_event_class_set_attribute succeeds in replacing the existing \"name\" attribute");
-       ret = bt_ctf_event_class_set_attribute(event_class, "id", obj);
-       ret &= bt_ctf_event_class_set_attribute(event_class, "loglevel", obj);
-       ok(ret,
-               "bt_ctf_event_class_set_attribute cannot set \"id\" or \"loglevel\" to a string value");
-       BT_OBJECT_PUT(obj);
-       obj = bt_object_string_create_init("http://kernel.org/");
-       assert(obj);
-       assert(!bt_ctf_event_class_set_attribute(event_class, "model.emf.uri", obj));
-       BT_OBJECT_PUT(obj);
-
-       ok(bt_ctf_event_class_get_attribute_count(NULL),
-               "bt_ctf_event_class_get_attribute_count handles a NULL event class");
-       ok(bt_ctf_event_class_get_attribute_count(event_class) == 4,
-               "bt_ctf_event_class_get_attribute_count returns the correct count");
-       ok(!bt_ctf_event_class_get_attribute_name(NULL, 0),
-               "bt_ctf_event_class_get_attribute_name handles a NULL event class correctly");
-       ok(!bt_ctf_event_class_get_attribute_name(event_class, 4),
-               "bt_ctf_event_class_get_attribute_name handles a too large index correctly");
-       ok(!bt_ctf_event_class_get_attribute_value(NULL, 0),
-               "bt_ctf_event_class_get_attribute_value handles a NULL event class correctly");
-       ok(!bt_ctf_event_class_get_attribute_value(event_class, 4),
-               "bt_ctf_event_class_get_attribute_value handles a too large index correctly");
-
-       memset(&attrs_count, 0, sizeof(attrs_count));
-
-       for (i = 0; i < 4; ++i) {
-               ret_string = bt_ctf_event_class_get_attribute_name(event_class,
-                       i);
-               obj = bt_ctf_event_class_get_attribute_value(event_class, i);
-               assert(ret_string && obj);
-
-               if (!strcmp(ret_string, "id")) {
-                       attrs_count.id++;
-                       ok(bt_object_is_integer(obj),
-                               "bt_ctf_event_class_get_attribute_value returns the correct type (\"%s\")",
-                               ret_string);
-               } else if (!strcmp(ret_string, "name")) {
-                       attrs_count.name++;
-                       ok(bt_object_is_string(obj),
-                               "bt_ctf_event_class_get_attribute_value returns the correct type (\"%s\")",
-                               ret_string);
-               } else if (!strcmp(ret_string, "loglevel")) {
-                       attrs_count.loglevel++;
-                       ok(bt_object_is_integer(obj),
-                               "bt_ctf_event_class_get_attribute_value returns the correct type (\"%s\")",
-                               ret_string);
-               } else if (!strcmp(ret_string, "model.emf.uri")) {
-                       attrs_count.modelemfuri++;
-                       ok(bt_object_is_string(obj),
-                               "bt_ctf_event_class_get_attribute_value returns the correct type (\"%s\")",
-                               ret_string);
-               } else {
-                       attrs_count.unknown++;
-               }
-
-               BT_OBJECT_PUT(obj);
-       }
-
-       ok(attrs_count.unknown == 0, "event class has no unknown attributes");
-       ok(attrs_count.id == 1 && attrs_count.name == 1 &&
-               attrs_count.loglevel == 1 && attrs_count.modelemfuri == 1,
-               "event class has one instance of each known attribute");
+       ok(bt_ctf_event_class_get_log_level(event_class) == BT_CTF_EVENT_CLASS_LOG_LEVEL_UNSPECIFIED,
+               "event class has the expected initial log level");
+       ok(!bt_ctf_event_class_get_emf_uri(event_class),
+               "as expected, event class has no initial EMF URI");
+       ok(bt_ctf_event_class_set_log_level(NULL, BT_CTF_EVENT_CLASS_LOG_LEVEL_INFO),
+               "bt_ctf_event_class_set_log_level handles a NULL event class correctly");
+       ok(bt_ctf_event_class_set_log_level(event_class, BT_CTF_EVENT_CLASS_LOG_LEVEL_UNKNOWN),
+               "bt_ctf_event_class_set_log_level handles an unknown log level correctly");
+       ok(!bt_ctf_event_class_set_log_level(event_class, BT_CTF_EVENT_CLASS_LOG_LEVEL_INFO),
+               "bt_ctf_event_class_set_log_level succeeds with a valid log level");
+       ok(bt_ctf_event_class_get_log_level(event_class) == BT_CTF_EVENT_CLASS_LOG_LEVEL_INFO,
+               "bt_ctf_event_class_get_log_level returns the expected log level");
+       ok(bt_ctf_event_class_set_emf_uri(NULL, "http://diamon.org/babeltrace/"),
+               "bt_ctf_event_class_set_emf_uri handles a NULL event class correctly");
+       ok(!bt_ctf_event_class_set_emf_uri(event_class, "http://diamon.org/babeltrace/"),
+               "bt_ctf_event_class_set_emf_uri succeeds with a valid EMF URI");
+       ok(strcmp(bt_ctf_event_class_get_emf_uri(event_class), "http://diamon.org/babeltrace/") == 0,
+               "bt_ctf_event_class_get_emf_uri returns the expected EMF URI");
+       ok(!bt_ctf_event_class_set_emf_uri(event_class, NULL),
+               "bt_ctf_event_class_set_emf_uri succeeds with NULL (to reset)");
+       ok(!bt_ctf_event_class_get_emf_uri(event_class),
+               "as expected, event class has no EMF URI after reset");
 
        /* Add event class to the stream class */
        ok(bt_ctf_stream_class_add_event_class(stream_class, NULL),
@@ -970,188 +675,123 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        ok(bt_ctf_stream_class_add_event_class(stream_class,
                event_class) == 0, "Add an event class to stream class");
 
-       ok(bt_ctf_event_class_get_stream_class(NULL) == NULL,
-               "bt_ctf_event_class_get_stream_class handles NULL correctly");
        ret_stream_class = bt_ctf_event_class_get_stream_class(event_class);
        ok(ret_stream_class == stream_class,
                "bt_ctf_event_class_get_stream_class returns the correct stream class");
-       bt_ctf_stream_class_put(ret_stream_class);
-
-       ok(bt_ctf_event_class_get_field_count(NULL) < 0,
-               "bt_ctf_event_class_get_field_count handles NULL correctly");
-       ok(bt_ctf_event_class_get_field_count(event_class) == 3,
-               "bt_ctf_event_class_get_field_count returns a correct value");
-
-       ok(bt_ctf_event_class_get_field(NULL, &ret_string,
-               &ret_field_type, 0) < 0,
-               "bt_ctf_event_class_get_field handles a NULL event class correctly");
-       ok(bt_ctf_event_class_get_field(event_class, NULL,
-               &ret_field_type, 0) < 0,
-               "bt_ctf_event_class_get_field handles a NULL field name correctly");
-       ok(bt_ctf_event_class_get_field(event_class, &ret_string,
-               NULL, 0) < 0,
-               "bt_ctf_event_class_get_field handles a NULL field type correctly");
-       ok(bt_ctf_event_class_get_field(event_class, &ret_string,
-               &ret_field_type, 42) < 0,
-               "bt_ctf_event_class_get_field handles an invalid index correctly");
-       ok(bt_ctf_event_class_get_field(event_class, &ret_string,
-               &ret_field_type, 0) == 0,
-               "bt_ctf_event_class_get_field returns a field");
-       ok(ret_field_type == uint_35_type,
-               "bt_ctf_event_class_get_field returns a correct field type");
-       bt_ctf_field_type_put(ret_field_type);
-       ok(!strcmp(ret_string, "uint_35"),
-               "bt_ctf_event_class_get_field returns a correct field name");
-       ok(bt_ctf_event_class_get_field_by_name(NULL, "") == NULL,
-               "bt_ctf_event_class_get_field_by_name handles a NULL event class correctly");
-       ok(bt_ctf_event_class_get_field_by_name(event_class, NULL) == NULL,
-               "bt_ctf_event_class_get_field_by_name handles a NULL field name correctly");
+       bt_put(ret_stream_class);
+
        ok(bt_ctf_event_class_get_field_by_name(event_class, "truie") == NULL,
                "bt_ctf_event_class_get_field_by_name handles an invalid field name correctly");
        ret_field_type = bt_ctf_event_class_get_field_by_name(event_class,
                "complex_structure");
-       ok(ret_field_type == complex_structure_type,
-               "bt_ctf_event_class_get_field_by_name returns a correct field type");
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(ret_field_type);
 
        event = bt_ctf_event_create(event_class);
        ok(event, "Instanciate a complex event");
 
-       ok(bt_ctf_event_get_class(NULL) == NULL,
-               "bt_ctf_event_get_class handles NULL correctly");
        ret_event_class = bt_ctf_event_get_class(event);
        ok(ret_event_class == event_class,
                "bt_ctf_event_get_class returns the correct event class");
-       bt_ctf_event_class_put(ret_event_class);
+       bt_put(ret_event_class);
 
        uint_35_field = bt_ctf_event_get_payload(event, "uint_35");
-       if (!uint_35_field) {
-               printf("uint_35_field is NULL\n");
-       }
-
        ok(uint_35_field, "Use bt_ctf_event_get_payload to get a field instance ");
-       bt_ctf_field_unsigned_integer_set_value(uint_35_field, 0x0DDF00D);
-       ok(bt_ctf_field_unsigned_integer_get_value(NULL, &ret_unsigned_int) < 0,
-               "bt_ctf_field_unsigned_integer_get_value properly properly handles a NULL field.");
-       ok(bt_ctf_field_unsigned_integer_get_value(uint_35_field, NULL) < 0,
-               "bt_ctf_field_unsigned_integer_get_value properly handles a NULL return value");
-       ok(bt_ctf_field_unsigned_integer_get_value(uint_35_field,
+       bt_ctf_field_integer_unsigned_set_value(uint_35_field, 0x0DDF00D);
+       ok(bt_ctf_field_integer_unsigned_get_value(uint_35_field,
                &ret_unsigned_int) == 0,
-               "bt_ctf_field_unsigned_integer_get_value succeeds after setting a value");
+               "bt_ctf_field_integer_unsigned_get_value succeeds after setting a value");
        ok(ret_unsigned_int == 0x0DDF00D,
-               "bt_ctf_field_unsigned_integer_get_value returns the correct value");
-       ok(bt_ctf_field_signed_integer_get_value(uint_35_field,
-               &ret_signed_int) < 0,
-               "bt_ctf_field_signed_integer_get_value fails on an unsigned field");
-       bt_ctf_field_put(uint_35_field);
+               "bt_ctf_field_integer_unsigned_get_value returns the correct value");
+       bt_put(uint_35_field);
 
        int_16_field = bt_ctf_event_get_payload(event, "int_16");
-       bt_ctf_field_signed_integer_set_value(int_16_field, -12345);
-       ok(bt_ctf_field_signed_integer_get_value(NULL, &ret_signed_int) < 0,
-               "bt_ctf_field_signed_integer_get_value properly handles a NULL field");
-       ok(bt_ctf_field_signed_integer_get_value(int_16_field, NULL) < 0,
-               "bt_ctf_field_signed_integer_get_value properly handles a NULL return value");
-       ok(bt_ctf_field_signed_integer_get_value(int_16_field,
+       bt_ctf_field_integer_signed_set_value(int_16_field, -12345);
+       ok(bt_ctf_field_integer_signed_get_value(int_16_field,
                &ret_signed_int) == 0,
-               "bt_ctf_field_signed_integer_get_value succeeds after setting a value");
+               "bt_ctf_field_integer_signed_get_value succeeds after setting a value");
        ok(ret_signed_int == -12345,
-               "bt_ctf_field_signed_integer_get_value returns the correct value");
-       ok(bt_ctf_field_unsigned_integer_get_value(int_16_field,
-               &ret_unsigned_int) < 0,
-               "bt_ctf_field_unsigned_integer_get_value fails on a signed field");
-       bt_ctf_field_put(int_16_field);
+               "bt_ctf_field_integer_signed_get_value returns the correct value");
+       bt_put(int_16_field);
 
        complex_structure_field = bt_ctf_event_get_payload(event,
                "complex_structure");
 
-       ok(bt_ctf_field_structure_get_field_by_index(NULL, 0) == NULL,
-               "bt_ctf_field_structure_get_field_by_index handles NULL correctly");
-       ok(bt_ctf_field_structure_get_field_by_index(NULL, 9) == NULL,
-               "bt_ctf_field_structure_get_field_by_index handles an invalid index correctly");
        inner_structure_field = bt_ctf_field_structure_get_field_by_index(
                complex_structure_field, 3);
        ret_field_type = bt_ctf_field_get_type(inner_structure_field);
-       bt_ctf_field_put(inner_structure_field);
-       ok(ret_field_type == inner_structure_type,
-               "bt_ctf_field_structure_get_field_by_index returns a correct field");
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(inner_structure_field);
+       bt_put(ret_field_type);
 
-       inner_structure_field = bt_ctf_field_structure_get_field(
+       inner_structure_field = bt_ctf_field_structure_get_field_by_name(
                complex_structure_field, "inner_structure");
-       a_string_field = bt_ctf_field_structure_get_field(
-               complex_structure_field, "a_string");
-       enum_variant_field = bt_ctf_field_structure_get_field(
+       a_string_field = bt_ctf_field_structure_get_field_by_name(
+               complex_structure_field, "string");
+       enum_variant_field = bt_ctf_field_structure_get_field_by_name(
                complex_structure_field, "variant_selector");
-       variant_field = bt_ctf_field_structure_get_field(
+       variant_field = bt_ctf_field_structure_get_field_by_name(
                complex_structure_field, "variant_value");
-       uint_35_field = bt_ctf_field_structure_get_field(
+       uint_35_field = bt_ctf_field_structure_get_field_by_name(
                inner_structure_field, "seq_len");
-       a_sequence_field = bt_ctf_field_structure_get_field(
+       a_sequence_field = bt_ctf_field_structure_get_field_by_name(
                inner_structure_field, "a_sequence");
-       an_array_field = bt_ctf_field_structure_get_field(
+       an_array_field = bt_ctf_field_structure_get_field_by_name(
                inner_structure_field, "an_array");
 
        enum_container_field = bt_ctf_field_enumeration_get_container(
                enum_variant_field);
-       bt_ctf_field_unsigned_integer_set_value(enum_container_field, 1);
+       bt_ctf_field_integer_unsigned_set_value(enum_container_field, 1);
        int_16_field = bt_ctf_field_variant_get_field(variant_field,
                enum_variant_field);
-       bt_ctf_field_signed_integer_set_value(int_16_field, -200);
-       bt_ctf_field_put(int_16_field);
-       ok(!bt_ctf_field_string_get_value(a_string_field),
-               "bt_ctf_field_string_get_value returns NULL on an unset field");
+       bt_ctf_field_integer_signed_set_value(int_16_field, -200);
+       bt_put(int_16_field);
        bt_ctf_field_string_set_value(a_string_field,
                test_string_1);
-       ok(!bt_ctf_field_string_get_value(NULL),
-               "bt_ctf_field_string_get_value correctly handles NULL");
-       ok(bt_ctf_field_string_append(NULL, "yeah"),
-               "bt_ctf_field_string_append correctly handles a NULL string field");
-       ok(bt_ctf_field_string_append(a_string_field, NULL),
-               "bt_ctf_field_string_append correctly handles a NULL string value");
        ok(!bt_ctf_field_string_append(a_string_field, test_string_2),
                "bt_ctf_field_string_append succeeds");
+       ok(!bt_ctf_field_string_append_len(a_string_field, test_string_3, 5),
+               "bt_ctf_field_string_append_len succeeds (append 5 characters)");
+       ok(!bt_ctf_field_string_append_len(a_string_field, &test_string_4[5], 3),
+               "bt_ctf_field_string_append_len succeeds (append 0 characters)");
+       ok(!bt_ctf_field_string_append_len(a_string_field, test_string_3, 0),
+               "bt_ctf_field_string_append_len succeeds (append 0 characters)");
+
        ret_string = bt_ctf_field_string_get_value(a_string_field);
        ok(ret_string, "bt_ctf_field_string_get_value returns a string");
        ok(ret_string ? !strcmp(ret_string, test_string_cat) : 0,
                "bt_ctf_field_string_get_value returns a correct value");
-       bt_ctf_field_unsigned_integer_set_value(uint_35_field,
+       bt_ctf_field_integer_unsigned_set_value(uint_35_field,
                SEQUENCE_TEST_LENGTH);
 
-       ok(bt_ctf_field_type_variant_get_field_type_from_tag(NULL,
-               enum_container_field) == NULL,
-               "bt_ctf_field_type_variant_get_field_type_from_tag handles a NULL variant type correctly");
-       ok(bt_ctf_field_type_variant_get_field_type_from_tag(variant_type,
-               NULL) == NULL,
-               "bt_ctf_field_type_variant_get_field_type_from_tag handles a NULL tag correctly");
        ret_field_type = bt_ctf_field_type_variant_get_field_type_from_tag(
                variant_type, enum_variant_field);
        ok(ret_field_type == int_16_type,
                "bt_ctf_field_type_variant_get_field_type_from_tag returns the correct field type");
 
-       ok(bt_ctf_field_sequence_get_length(a_sequence_field) == NULL,
-               "bt_ctf_field_sequence_get_length returns NULL when length is unset");
        ok(bt_ctf_field_sequence_set_length(a_sequence_field,
                uint_35_field) == 0, "Set a sequence field's length");
-       ret_field = bt_ctf_field_sequence_get_length(a_sequence_field);
-       ok(ret_field == uint_35_field,
-               "bt_ctf_field_sequence_get_length returns the correct length field");
-       ok(bt_ctf_field_sequence_get_length(NULL) == NULL,
-               "bt_ctf_field_sequence_get_length properly handles NULL");
 
        for (i = 0; i < SEQUENCE_TEST_LENGTH; i++) {
                int_16_field = bt_ctf_field_sequence_get_field(
                        a_sequence_field, i);
-               bt_ctf_field_signed_integer_set_value(int_16_field, 4 - i);
-               bt_ctf_field_put(int_16_field);
+               bt_ctf_field_integer_signed_set_value(int_16_field, 4 - i);
+               bt_put(int_16_field);
        }
 
        for (i = 0; i < ARRAY_TEST_LENGTH; i++) {
                int_16_field = bt_ctf_field_array_get_field(
                        an_array_field, i);
-               bt_ctf_field_signed_integer_set_value(int_16_field, i);
-               bt_ctf_field_put(int_16_field);
+               bt_ctf_field_integer_signed_set_value(int_16_field, i);
+               bt_put(int_16_field);
        }
 
+       stream_event_ctx_field = bt_ctf_event_get_stream_event_context(event);
+       assert(stream_event_ctx_field);
+       stream_event_ctx_int_field = bt_ctf_field_structure_get_field_by_name(
+               stream_event_ctx_field, "common_event_context");
+       BT_PUT(stream_event_ctx_field);
+       bt_ctf_field_integer_unsigned_set_value(stream_event_ctx_int_field, 17);
+       BT_PUT(stream_event_ctx_int_field);
+
        bt_ctf_clock_set_time(clock, ++current_time);
        ok(bt_ctf_stream_append_event(stream, event) == 0,
                "Append a complex event to a stream");
@@ -1161,46 +801,45 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
         * otherwise flush will fail.
         */
        packet_context = bt_ctf_stream_get_packet_context(stream);
-       packet_context_field = bt_ctf_field_structure_get_field(packet_context,
+       packet_context_field = bt_ctf_field_structure_get_field_by_name(packet_context,
                "custom_packet_context_field");
-       bt_ctf_field_unsigned_integer_set_value(packet_context_field, 1);
+       bt_ctf_field_integer_unsigned_set_value(packet_context_field, 1);
 
        ok(bt_ctf_stream_flush(stream) == 0,
                "Flush a stream containing a complex event");
 
-       bt_ctf_field_put(uint_35_field);
-       bt_ctf_field_put(a_string_field);
-       bt_ctf_field_put(inner_structure_field);
-       bt_ctf_field_put(complex_structure_field);
-       bt_ctf_field_put(a_sequence_field);
-       bt_ctf_field_put(an_array_field);
-       bt_ctf_field_put(enum_variant_field);
-       bt_ctf_field_put(enum_container_field);
-       bt_ctf_field_put(variant_field);
-       bt_ctf_field_put(ret_field);
-       bt_ctf_field_put(packet_context_field);
-       bt_ctf_field_put(packet_context);
-       bt_ctf_field_type_put(uint_35_type);
-       bt_ctf_field_type_put(int_16_type);
-       bt_ctf_field_type_put(string_type);
-       bt_ctf_field_type_put(sequence_type);
-       bt_ctf_field_type_put(array_type);
-       bt_ctf_field_type_put(inner_structure_type);
-       bt_ctf_field_type_put(complex_structure_type);
-       bt_ctf_field_type_put(uint_3_type);
-       bt_ctf_field_type_put(enum_variant_type);
-       bt_ctf_field_type_put(variant_type);
-       bt_ctf_field_type_put(ret_field_type);
-       bt_ctf_event_class_put(event_class);
-       bt_ctf_event_put(event);
+       bt_put(uint_35_field);
+       bt_put(a_string_field);
+       bt_put(inner_structure_field);
+       bt_put(complex_structure_field);
+       bt_put(a_sequence_field);
+       bt_put(an_array_field);
+       bt_put(enum_variant_field);
+       bt_put(enum_container_field);
+       bt_put(variant_field);
+       bt_put(packet_context_field);
+       bt_put(packet_context);
+       bt_put(uint_35_type);
+       bt_put(int_16_type);
+       bt_put(string_type);
+       bt_put(sequence_type);
+       bt_put(array_type);
+       bt_put(inner_structure_type);
+       bt_put(complex_structure_type);
+       bt_put(uint_3_type);
+       bt_put(enum_variant_type);
+       bt_put(variant_type);
+       bt_put(ret_field_type);
+       bt_put(event_class);
+       bt_put(event);
 }
 
+static
 void type_field_tests()
 {
        struct bt_ctf_field *uint_12;
        struct bt_ctf_field *int_16;
        struct bt_ctf_field *string;
-       struct bt_ctf_field *enumeration;
        struct bt_ctf_field_type *composite_structure_type;
        struct bt_ctf_field_type *structure_seq_type;
        struct bt_ctf_field_type *string_type;
@@ -1210,14 +849,9 @@ void type_field_tests()
        struct bt_ctf_field_type *uint_12_type =
                bt_ctf_field_type_integer_create(12);
        struct bt_ctf_field_type *enumeration_type;
-       struct bt_ctf_field_type *enumeration_sequence_type;
-       struct bt_ctf_field_type *enumeration_array_type;
        struct bt_ctf_field_type *returned_type;
        const char *ret_string;
 
-       returned_type = bt_ctf_field_get_type(NULL);
-       ok(!returned_type, "bt_ctf_field_get_type handles NULL correctly");
-
        ok(uint_12_type, "Create an unsigned integer type");
        ok(bt_ctf_field_type_integer_set_base(uint_12_type,
                BT_CTF_INTEGER_BASE_BINARY) == 0,
@@ -1240,12 +874,8 @@ void type_field_tests()
                "Set integer type signedness to signed");
        ok(bt_ctf_field_type_integer_set_signed(uint_12_type, 0) == 0,
                "Set integer type signedness to unsigned");
-       ok(bt_ctf_field_type_integer_get_size(NULL) < 0,
-               "bt_ctf_field_type_integer_get_size handles NULL correctly");
        ok(bt_ctf_field_type_integer_get_size(uint_12_type) == 12,
                "bt_ctf_field_type_integer_get_size returns a correct value");
-       ok(bt_ctf_field_type_integer_get_signed(NULL) < 0,
-               "bt_ctf_field_type_integer_get_signed handles NULL correctly");
        ok(bt_ctf_field_type_integer_get_signed(uint_12_type) == 0,
                "bt_ctf_field_type_integer_get_signed returns a correct value for unsigned types");
 
@@ -1264,39 +894,32 @@ void type_field_tests()
        ok(bt_ctf_field_type_get_byte_order(uint_12_type) ==
                BT_CTF_BYTE_ORDER_BIG_ENDIAN,
                "bt_ctf_field_type_get_byte_order returns a correct value");
-       ok(bt_ctf_field_type_get_byte_order(NULL) ==
-               BT_CTF_BYTE_ORDER_UNKNOWN,
-               "bt_ctf_field_type_get_byte_order handles NULL correctly");
 
-       ok(bt_ctf_field_type_get_type_id(NULL) ==
-               CTF_TYPE_UNKNOWN,
-               "bt_ctf_field_type_get_type_id handles NULL correctly");
        ok(bt_ctf_field_type_get_type_id(uint_12_type) ==
-               CTF_TYPE_INTEGER,
+               BT_CTF_FIELD_TYPE_ID_INTEGER,
                "bt_ctf_field_type_get_type_id returns a correct value with an integer type");
 
-       ok(bt_ctf_field_type_integer_get_base(NULL) ==
-               BT_CTF_INTEGER_BASE_UNKNOWN,
-               "bt_ctf_field_type_integer_get_base handles NULL correctly");
        ok(bt_ctf_field_type_integer_get_base(uint_12_type) ==
                BT_CTF_INTEGER_BASE_HEXADECIMAL,
                "bt_ctf_field_type_integer_get_base returns a correct value");
 
-       ok(bt_ctf_field_type_integer_set_encoding(NULL, CTF_STRING_ASCII) < 0,
+       ok(bt_ctf_field_type_integer_set_encoding(NULL,
+               BT_CTF_STRING_ENCODING_ASCII) < 0,
                "bt_ctf_field_type_integer_set_encoding handles NULL correctly");
        ok(bt_ctf_field_type_integer_set_encoding(uint_12_type,
-               (enum ctf_string_encoding) 123) < 0,
+               (enum bt_ctf_string_encoding) 123) < 0,
                "bt_ctf_field_type_integer_set_encoding handles invalid encodings correctly");
        ok(bt_ctf_field_type_integer_set_encoding(uint_12_type,
-               CTF_STRING_UTF8) == 0,
+               BT_CTF_STRING_ENCODING_UTF8) == 0,
                "Set integer type encoding to UTF8");
-       ok(bt_ctf_field_type_integer_get_encoding(NULL) == CTF_STRING_UNKNOWN,
-               "bt_ctf_field_type_integer_get_encoding handles NULL correctly");
-       ok(bt_ctf_field_type_integer_get_encoding(uint_12_type) == CTF_STRING_UTF8,
+       ok(bt_ctf_field_type_integer_get_encoding(uint_12_type) ==
+               BT_CTF_STRING_ENCODING_UTF8,
                "bt_ctf_field_type_integer_get_encoding returns a correct value");
 
        int_16_type = bt_ctf_field_type_integer_create(16);
-       bt_ctf_field_type_integer_set_signed(int_16_type, 1);
+       assert(int_16_type);
+       ok(!bt_ctf_field_type_integer_set_signed(int_16_type, 1),
+               "Set signedness of 16 bit integer to true");
        ok(bt_ctf_field_type_integer_get_signed(int_16_type) == 1,
                "bt_ctf_field_type_integer_get_signed returns a correct value for signed types");
        uint_8_type = bt_ctf_field_type_integer_create(8);
@@ -1304,45 +927,38 @@ void type_field_tests()
                bt_ctf_field_type_sequence_create(int_16_type, "seq_len");
        ok(sequence_type, "Create a sequence of int16_t type");
        ok(bt_ctf_field_type_get_type_id(sequence_type) ==
-               CTF_TYPE_SEQUENCE,
+               BT_CTF_FIELD_TYPE_ID_SEQUENCE,
                "bt_ctf_field_type_get_type_id returns a correct value with a sequence type");
 
-       ok(bt_ctf_field_type_sequence_get_length_field_name(NULL) == NULL,
-               "bt_ctf_field_type_sequence_get_length_field_name handles NULL correctly");
        ret_string = bt_ctf_field_type_sequence_get_length_field_name(
                sequence_type);
        ok(!strcmp(ret_string, "seq_len"),
                "bt_ctf_field_type_sequence_get_length_field_name returns the correct value");
-       ok(bt_ctf_field_type_sequence_get_element_type(NULL) == NULL,
-               "bt_ctf_field_type_sequence_get_element_type handles NULL correctly");
-       returned_type = bt_ctf_field_type_sequence_get_element_type(
+       returned_type = bt_ctf_field_type_sequence_get_element_field_type(
                sequence_type);
        ok(returned_type == int_16_type,
-               "bt_ctf_field_type_sequence_get_element_type returns the correct type");
-       bt_ctf_field_type_put(returned_type);
+               "bt_ctf_field_type_sequence_get_element_field_type returns the correct type");
+       bt_put(returned_type);
 
        string_type = bt_ctf_field_type_string_create();
        ok(string_type, "Create a string type");
        ok(bt_ctf_field_type_string_set_encoding(string_type,
-               CTF_STRING_NONE),
+               BT_CTF_STRING_ENCODING_NONE),
                "Reject invalid \"None\" string encoding");
        ok(bt_ctf_field_type_string_set_encoding(string_type,
                42),
                "Reject invalid string encoding");
        ok(bt_ctf_field_type_string_set_encoding(string_type,
-               CTF_STRING_ASCII) == 0,
+               BT_CTF_STRING_ENCODING_ASCII) == 0,
                "Set string encoding to ASCII");
 
-       ok(bt_ctf_field_type_string_get_encoding(NULL) ==
-               CTF_STRING_UNKNOWN,
-               "bt_ctf_field_type_string_get_encoding handles NULL correctly");
        ok(bt_ctf_field_type_string_get_encoding(string_type) ==
-               CTF_STRING_ASCII,
+               BT_CTF_STRING_ENCODING_ASCII,
                "bt_ctf_field_type_string_get_encoding returns the correct value");
 
        structure_seq_type = bt_ctf_field_type_structure_create();
        ok(bt_ctf_field_type_get_type_id(structure_seq_type) ==
-               CTF_TYPE_STRUCT,
+               BT_CTF_FIELD_TYPE_ID_STRUCT,
                "bt_ctf_field_type_get_type_id returns a correct value with a structure type");
        ok(structure_seq_type, "Create a structure type");
        ok(bt_ctf_field_type_structure_add_field(structure_seq_type,
@@ -1352,23 +968,16 @@ void type_field_tests()
                sequence_type, "a_sequence") == 0,
                "Add a sequence type to a structure");
 
-       ok(bt_ctf_field_type_structure_get_field_count(NULL) < 0,
-               "bt_ctf_field_type_structure_get_field_count handles NULL correctly");
        ok(bt_ctf_field_type_structure_get_field_count(structure_seq_type) == 2,
                "bt_ctf_field_type_structure_get_field_count returns a correct value");
 
-       ok(bt_ctf_field_type_structure_get_field(NULL,
-               &ret_string, &returned_type, 1) < 0,
-               "bt_ctf_field_type_structure_get_field handles a NULL type correctly");
        ok(bt_ctf_field_type_structure_get_field(structure_seq_type,
-               NULL, &returned_type, 1) < 0,
+               NULL, &returned_type, 1) == 0,
                "bt_ctf_field_type_structure_get_field handles a NULL name correctly");
+       bt_put(returned_type);
        ok(bt_ctf_field_type_structure_get_field(structure_seq_type,
-               &ret_string, NULL, 1) < 0,
+               &ret_string, NULL, 1) == 0,
                "bt_ctf_field_type_structure_get_field handles a NULL return type correctly");
-       ok(bt_ctf_field_type_structure_get_field(structure_seq_type,
-               &ret_string, &returned_type, 10) < 0,
-               "bt_ctf_field_type_structure_get_field handles an invalid index correctly");
        ok(bt_ctf_field_type_structure_get_field(structure_seq_type,
                &ret_string, &returned_type, 1) == 0,
                "bt_ctf_field_type_structure_get_field returns a field");
@@ -1376,17 +985,13 @@ void type_field_tests()
                "bt_ctf_field_type_structure_get_field returns a correct field name");
        ok(returned_type == sequence_type,
                "bt_ctf_field_type_structure_get_field returns a correct field type");
-       bt_ctf_field_type_put(returned_type);
+       bt_put(returned_type);
 
-       ok(bt_ctf_field_type_structure_get_field_type_by_name(NULL, "a_sequence") == NULL,
-               "bt_ctf_field_type_structure_get_field_type_by_name handles a NULL structure correctly");
-       ok(bt_ctf_field_type_structure_get_field_type_by_name(structure_seq_type, NULL) == NULL,
-               "bt_ctf_field_type_structure_get_field_type_by_name handles a NULL field name correctly");
        returned_type = bt_ctf_field_type_structure_get_field_type_by_name(
                structure_seq_type, "a_sequence");
        ok(returned_type == sequence_type,
                "bt_ctf_field_type_structure_get_field_type_by_name returns the correct field type");
-       bt_ctf_field_type_put(returned_type);
+       bt_put(returned_type);
 
        composite_structure_type = bt_ctf_field_type_structure_create();
        ok(bt_ctf_field_type_structure_add_field(composite_structure_type,
@@ -1396,17 +1001,11 @@ void type_field_tests()
                structure_seq_type, "inner_structure") == 0,
                "Add a structure type to a structure");
 
-       ok(bt_ctf_field_type_structure_get_field_type_by_name(
-               NULL, "a_sequence") == NULL,
-               "bt_ctf_field_type_structure_get_field_type_by_name handles a NULL field correctly");
-       ok(bt_ctf_field_type_structure_get_field_type_by_name(
-               structure_seq_type, NULL) == NULL,
-               "bt_ctf_field_type_structure_get_field_type_by_name handles a NULL field name correctly");
        returned_type = bt_ctf_field_type_structure_get_field_type_by_name(
                structure_seq_type, "a_sequence");
        ok(returned_type == sequence_type,
                "bt_ctf_field_type_structure_get_field_type_by_name returns a correct type");
-       bt_ctf_field_type_put(returned_type);
+       bt_put(returned_type);
 
        int_16 = bt_ctf_field_create(int_16_type);
        ok(int_16, "Instanciate a signed 16-bit integer");
@@ -1423,29 +1022,17 @@ void type_field_tests()
        ok(bt_ctf_field_type_integer_set_signed(uint_12_type, 0),
                "Check an integer type's signedness can't be modified after instanciation");
 
-       /* Check signed property is checked */
-       ok(bt_ctf_field_signed_integer_set_value(uint_12, -52),
-               "Check bt_ctf_field_signed_integer_set_value is not allowed on an unsigned integer");
-       ok(bt_ctf_field_unsigned_integer_set_value(int_16, 42),
-               "Check bt_ctf_field_unsigned_integer_set_value is not allowed on a signed integer");
-
        /* Check overflows are properly tested for */
-       ok(bt_ctf_field_signed_integer_set_value(int_16, -32768) == 0,
+       ok(bt_ctf_field_integer_signed_set_value(int_16, -32768) == 0,
                "Check -32768 is allowed for a signed 16-bit integer");
-       ok(bt_ctf_field_signed_integer_set_value(int_16, 32767) == 0,
+       ok(bt_ctf_field_integer_signed_set_value(int_16, 32767) == 0,
                "Check 32767 is allowed for a signed 16-bit integer");
-       ok(bt_ctf_field_signed_integer_set_value(int_16, 32768),
-               "Check 32768 is not allowed for a signed 16-bit integer");
-       ok(bt_ctf_field_signed_integer_set_value(int_16, -32769),
-               "Check -32769 is not allowed for a signed 16-bit integer");
-       ok(bt_ctf_field_signed_integer_set_value(int_16, -42) == 0,
+       ok(bt_ctf_field_integer_signed_set_value(int_16, -42) == 0,
                "Check -42 is allowed for a signed 16-bit integer");
 
-       ok(bt_ctf_field_unsigned_integer_set_value(uint_12, 4095) == 0,
+       ok(bt_ctf_field_integer_unsigned_set_value(uint_12, 4095) == 0,
                "Check 4095 is allowed for an unsigned 12-bit integer");
-       ok(bt_ctf_field_unsigned_integer_set_value(uint_12, 4096),
-               "Check 4096 is not allowed for a unsigned 12-bit integer");
-       ok(bt_ctf_field_unsigned_integer_set_value(uint_12, 0) == 0,
+       ok(bt_ctf_field_integer_unsigned_set_value(uint_12, 0) == 0,
                "Check 0 is allowed for an unsigned 12-bit integer");
 
        string = bt_ctf_field_create(string_type);
@@ -1456,38 +1043,22 @@ void type_field_tests()
        enumeration_type = bt_ctf_field_type_enumeration_create(uint_12_type);
        ok(enumeration_type,
                "Create an enumeration type with an unsigned 12-bit integer as container");
-       enumeration_sequence_type = bt_ctf_field_type_sequence_create(
-               enumeration_type, "count");
-       ok(!enumeration_sequence_type,
-               "Check enumeration types are validated when creating a sequence");
-       enumeration_array_type = bt_ctf_field_type_array_create(
-               enumeration_type, 10);
-       ok(!enumeration_array_type,
-               "Check enumeration types are validated when creating an array");
-       ok(bt_ctf_field_type_structure_add_field(composite_structure_type,
-               enumeration_type, "enumeration"),
-               "Check enumeration types are validated when adding them as structure members");
-       enumeration = bt_ctf_field_create(enumeration_type);
-       ok(!enumeration,
-               "Check enumeration types are validated before instantiation");
-
-       bt_ctf_field_put(string);
-       bt_ctf_field_put(uint_12);
-       bt_ctf_field_put(int_16);
-       bt_ctf_field_put(enumeration);
-       bt_ctf_field_type_put(composite_structure_type);
-       bt_ctf_field_type_put(structure_seq_type);
-       bt_ctf_field_type_put(string_type);
-       bt_ctf_field_type_put(sequence_type);
-       bt_ctf_field_type_put(uint_8_type);
-       bt_ctf_field_type_put(int_16_type);
-       bt_ctf_field_type_put(uint_12_type);
-       bt_ctf_field_type_put(enumeration_type);
-       bt_ctf_field_type_put(enumeration_sequence_type);
-       bt_ctf_field_type_put(enumeration_array_type);
-       bt_ctf_field_type_put(returned_type);
+
+       bt_put(string);
+       bt_put(uint_12);
+       bt_put(int_16);
+       bt_put(composite_structure_type);
+       bt_put(structure_seq_type);
+       bt_put(string_type);
+       bt_put(sequence_type);
+       bt_put(uint_8_type);
+       bt_put(int_16_type);
+       bt_put(uint_12_type);
+       bt_put(enumeration_type);
+       bt_put(returned_type);
 }
 
+static
 void packet_resize_test(struct bt_ctf_stream_class *stream_class,
                struct bt_ctf_stream *stream, struct bt_ctf_clock *clock)
 {
@@ -1510,7 +1081,10 @@ void packet_resize_test(struct bt_ctf_stream_class *stream_class,
        uint64_t ret_uint64;
        int events_appended = 0;
        struct bt_ctf_field *packet_context = NULL,
-               *packet_context_field = NULL, *event_context = NULL;
+               *packet_context_field = NULL, *stream_event_context = NULL;
+       struct bt_ctf_field_type *ep_field_1_type = NULL;
+       struct bt_ctf_field_type *ep_a_string_type = NULL;
+       struct bt_ctf_field_type *ep_type = NULL;
 
        ret |= bt_ctf_event_class_add_field(event_class, integer_type,
                "field_1");
@@ -1522,73 +1096,63 @@ void packet_resize_test(struct bt_ctf_stream_class *stream_class,
                goto end;
        }
 
+       /*
+        * bt_ctf_stream_class_add_event_class() copies the field types
+        * of event_class, so we retrieve the new ones to create the
+        * appropriate fields.
+        */
+       ep_type = bt_ctf_event_class_get_payload_field_type(event_class);
+       assert(ep_type);
+       ep_field_1_type = bt_ctf_field_type_structure_get_field_type_by_name(
+               ep_type, "field_1");
+       assert(ep_field_1_type);
+       ep_a_string_type = bt_ctf_field_type_structure_get_field_type_by_name(
+               ep_type, "a_string");
+       assert(ep_a_string_type);
+
        event = bt_ctf_event_create(event_class);
-       ret_field = bt_ctf_event_get_payload_by_index(event, 0);
+       ret_field = bt_ctf_event_get_payload(event, 0);
        ret_field_type = bt_ctf_field_get_type(ret_field);
-       ok(ret_field_type == integer_type,
-               "bt_ctf_event_get_payload_by_index returns a correct field");
-       bt_ctf_field_type_put(ret_field_type);
-       bt_ctf_field_put(ret_field);
-
-       ok(bt_ctf_event_get_payload_by_index(NULL, 0) == NULL,
-               "bt_ctf_event_get_payload_by_index handles NULL correctly");
-       ok(bt_ctf_event_get_payload_by_index(event, 4) == NULL,
-               "bt_ctf_event_get_payload_by_index handles an invalid index correctly");
-       bt_ctf_event_put(event);
-
-       ok(bt_ctf_stream_get_event_context(NULL) == NULL,
-               "bt_ctf_stream_get_event_context handles NULL correctly");
-       event_context = bt_ctf_stream_get_event_context(stream);
-       ok(event_context,
-               "bt_ctf_stream_get_event_context returns a stream event context");
-       ok(bt_ctf_stream_set_event_context(NULL, event_context) < 0,
-               "bt_ctf_stream_set_event_context handles a NULL stream correctly");
-       ok(bt_ctf_stream_set_event_context(stream, NULL) < 0,
-               "bt_ctf_stream_set_event_context handles a NULL stream event context correctly");
-       ok(!bt_ctf_stream_set_event_context(stream, event_context),
-               "bt_ctf_stream_set_event_context correctly set a stream event context");
-       ret_field = bt_ctf_field_create(integer_type);
-       ok(bt_ctf_stream_set_event_context(stream, ret_field) < 0,
-               "bt_ctf_stream_set_event_context rejects an event context of incorrect type");
-       bt_ctf_field_put(ret_field);
-
-       for (i = 0; i < PACKET_RESIZE_TEST_LENGTH; i++) {
+       bt_put(ret_field_type);
+       bt_put(ret_field);
+       bt_put(event);
+
+       for (i = 0; i < packet_resize_test_length; i++) {
                event = bt_ctf_event_create(event_class);
                struct bt_ctf_field *integer =
-                       bt_ctf_field_create(integer_type);
+                       bt_ctf_field_create(ep_field_1_type);
                struct bt_ctf_field *string =
-                       bt_ctf_field_create(string_type);
+                       bt_ctf_field_create(ep_a_string_type);
 
                ret |= bt_ctf_clock_set_time(clock, ++current_time);
-               ret |= bt_ctf_field_unsigned_integer_set_value(integer, i);
+               ret |= bt_ctf_field_integer_unsigned_set_value(integer, i);
                ret |= bt_ctf_event_set_payload(event, "field_1",
                        integer);
-               bt_ctf_field_put(integer);
+               bt_put(integer);
                ret |= bt_ctf_field_string_set_value(string, "This is a test");
                ret |= bt_ctf_event_set_payload(event, "a_string",
                        string);
-               bt_ctf_field_put(string);
+               bt_put(string);
 
                /* Populate stream event context */
-               integer = bt_ctf_field_structure_get_field(event_context,
+               stream_event_context =
+                       bt_ctf_event_get_stream_event_context(event);
+               integer = bt_ctf_field_structure_get_field_by_name(stream_event_context,
                        "common_event_context");
-               ret |= bt_ctf_field_unsigned_integer_set_value(integer,
+               BT_PUT(stream_event_context);
+               ret |= bt_ctf_field_integer_unsigned_set_value(integer,
                        i % 42);
-               bt_ctf_field_put(integer);
+               bt_put(integer);
 
                ret |= bt_ctf_stream_append_event(stream, event);
-               bt_ctf_event_put(event);
+               bt_put(event);
 
                if (ret) {
                        break;
                }
        }
 
-       events_appended = !!(i == PACKET_RESIZE_TEST_LENGTH);
-       ok(bt_ctf_stream_get_discarded_events_count(NULL, &ret_uint64) < 0,
-               "bt_ctf_stream_get_discarded_events_count handles a NULL stream correctly");
-       ok(bt_ctf_stream_get_discarded_events_count(stream, NULL) < 0,
-               "bt_ctf_stream_get_discarded_events_count handles a NULL return pointer correctly");
+       events_appended = !!(i == packet_resize_test_length);
        ret = bt_ctf_stream_get_discarded_events_count(stream, &ret_uint64);
        ok(ret == 0 && ret_uint64 == 0,
                "bt_ctf_stream_get_discarded_events_count returns a correct number of discarded events when none were discarded");
@@ -1605,23 +1169,27 @@ end:
         * otherwise flush will fail.
         */
        packet_context = bt_ctf_stream_get_packet_context(stream);
-       packet_context_field = bt_ctf_field_structure_get_field(packet_context,
+       packet_context_field = bt_ctf_field_structure_get_field_by_name(packet_context,
                "custom_packet_context_field");
-       bt_ctf_field_unsigned_integer_set_value(packet_context_field, 2);
+       bt_ctf_field_integer_unsigned_set_value(packet_context_field, 2);
 
        ok(bt_ctf_stream_flush(stream) == 0,
                "Flush a stream that forces a packet resize");
        ret = bt_ctf_stream_get_discarded_events_count(stream, &ret_uint64);
        ok(ret == 0 && ret_uint64 == 1000,
                "bt_ctf_stream_get_discarded_events_count returns a correct number of discarded events after a flush");
-       bt_ctf_field_type_put(integer_type);
-       bt_ctf_field_type_put(string_type);
-       bt_ctf_field_put(packet_context);
-       bt_ctf_field_put(packet_context_field);
-       bt_ctf_field_put(event_context);
-       bt_ctf_event_class_put(event_class);
+       bt_put(integer_type);
+       bt_put(string_type);
+       bt_put(packet_context);
+       bt_put(packet_context_field);
+       bt_put(stream_event_context);
+       bt_put(event_class);
+       bt_put(ep_field_1_type);
+       bt_put(ep_a_string_type);
+       bt_put(ep_type);
 }
 
+static
 void test_empty_stream(struct bt_ctf_writer *writer)
 {
        int ret = 0;
@@ -1643,8 +1211,11 @@ void test_empty_stream(struct bt_ctf_writer *writer)
                goto end;
        }
 
-       ok(bt_ctf_stream_class_get_trace(NULL) == NULL,
-               "bt_ctf_stream_class_get_trace handles NULL correctly");
+       ret = bt_ctf_stream_class_set_packet_context_type(stream_class, NULL);
+       assert(ret == 0);
+       ret = bt_ctf_stream_class_set_event_header_type(stream_class, NULL);
+       assert(ret == 0);
+
        ok(bt_ctf_stream_class_get_trace(stream_class) == NULL,
                "bt_ctf_stream_class_get_trace returns NULL when stream class is orphaned");
 
@@ -1661,39 +1232,217 @@ void test_empty_stream(struct bt_ctf_writer *writer)
 end:
        ok(ret == 0,
                "Created a stream class with default attributes and an empty stream");
-       bt_ctf_trace_put(trace);
-       bt_ctf_trace_put(ret_trace);
-       bt_ctf_stream_put(stream);
-       bt_ctf_stream_class_put(stream_class);
+       bt_put(trace);
+       bt_put(ret_trace);
+       bt_put(stream);
+       bt_put(stream_class);
 }
 
-void test_instanciate_event_before_stream(struct bt_ctf_writer *writer)
+static
+void test_custom_event_header_stream(struct bt_ctf_writer *writer,
+                       struct bt_ctf_clock *clock)
 {
-       int ret = 0;
-       struct bt_ctf_trace *trace = NULL;
-       struct bt_ctf_clock *clock = NULL;
+       int i, ret;
        struct bt_ctf_stream_class *stream_class = NULL;
-       struct bt_ctf_stream *stream = NULL,
-               *ret_stream = NULL;
+       struct bt_ctf_stream *stream = NULL;
+       struct bt_ctf_field_type *integer_type = NULL,
+               *sequence_type = NULL, *event_header_type = NULL;
+       struct bt_ctf_field *integer = NULL, *sequence = NULL,
+               *event_header = NULL, *packet_header = NULL;
        struct bt_ctf_event_class *event_class = NULL;
        struct bt_ctf_event *event = NULL;
-       struct bt_ctf_field_type *integer_type = NULL;
-       struct bt_ctf_field *integer = NULL;
 
-       trace = bt_ctf_writer_get_trace(writer);
-       if (!trace) {
-               diag("Failed to get trace from writer");
-               ret = -1;
+       stream_class = bt_ctf_stream_class_create("custom_event_header_stream");
+       if (!stream_class) {
+               fail("Failed to create stream class");
                goto end;
        }
 
-       clock = bt_ctf_trace_get_clock(trace, 0);
-       if (!clock) {
-               diag("Failed to get clock from trace");
-               ret = -1;
+       ret = bt_ctf_stream_class_set_clock(stream_class, clock);
+       if (ret) {
+               fail("Failed to set stream class clock");
+               goto end;
+       }
+
+       /*
+        * Customize event header to add an "seq_len" integer member
+        * which will be used as the length of a sequence in an event of this
+        * stream.
+        */
+       event_header_type = bt_ctf_stream_class_get_event_header_type(
+               stream_class);
+       if (!event_header_type) {
+               fail("Failed to get event header type");
+               goto end;
+       }
+
+       integer_type = bt_ctf_field_type_integer_create(13);
+       if (!integer_type) {
+               fail("Failed to create length integer type");
+               goto end;
+       }
+
+       ret = bt_ctf_field_type_structure_add_field(event_header_type,
+               integer_type, "seq_len");
+       if (ret) {
+               fail("Failed to add a new field to stream event header");
+               goto end;
+       }
+
+       event_class = bt_ctf_event_class_create("sequence_event");
+       if (!event_class) {
+               fail("Failed to create event class");
+               goto end;
+       }
+
+       /*
+        * This event's payload will contain a sequence which references
+        * stream.event.header.seq_len as its length field.
+        */
+       sequence_type = bt_ctf_field_type_sequence_create(integer_type,
+               "stream.event.header.seq_len");
+       if (!sequence_type) {
+               fail("Failed to create a sequence");
+               goto end;
+       }
+
+       ret = bt_ctf_event_class_add_field(event_class, sequence_type,
+               "some_sequence");
+       if (ret) {
+               fail("Failed to add a sequence to an event class");
                goto end;
        }
 
+       ret = bt_ctf_stream_class_add_event_class(stream_class, event_class);
+       if (ret) {
+               fail("Failed to add event class to stream class");
+               goto end;
+       }
+
+       stream = bt_ctf_writer_create_stream(writer, stream_class);
+       if (!stream) {
+               fail("Failed to create stream")
+               goto end;
+       }
+
+       /*
+        * We have defined a custom packet header field. We have to populate it
+        * explicitly.
+        */
+       packet_header = bt_ctf_stream_get_packet_header(stream);
+       if (!packet_header) {
+               fail("Failed to get stream packet header");
+               goto end;
+       }
+
+       integer = bt_ctf_field_structure_get_field_by_name(packet_header,
+               "custom_trace_packet_header_field");
+       if (!integer) {
+               fail("Failed to retrieve custom_trace_packet_header_field");
+               goto end;
+       }
+
+       ret = bt_ctf_field_integer_unsigned_set_value(integer, 3487);
+       if (ret) {
+               fail("Failed to set custom_trace_packet_header_field value");
+               goto end;
+       }
+       bt_put(integer);
+
+       event = bt_ctf_event_create(event_class);
+       if (!event) {
+               fail("Failed to create event");
+               goto end;
+       }
+
+       event_header = bt_ctf_event_get_header(event);
+       if (!event_header) {
+               fail("Failed to get event header");
+               goto end;
+       }
+
+       integer = bt_ctf_field_structure_get_field_by_name(event_header,
+               "seq_len");
+       if (!integer) {
+               fail("Failed to get seq_len field from event header");
+               goto end;
+       }
+
+       ret = bt_ctf_field_integer_unsigned_set_value(integer, 2);
+       if (ret) {
+               fail("Failed to set seq_len value in event header");
+               goto end;
+       }
+
+       /* Populate both sequence integer fields */
+       sequence = bt_ctf_event_get_payload(event, "some_sequence");
+       if (!sequence) {
+               fail("Failed to retrieve sequence from event");
+               goto end;
+       }
+
+       ret = bt_ctf_field_sequence_set_length(sequence, integer);
+       if (ret) {
+               fail("Failed to set sequence length");
+               goto end;
+       }
+       bt_put(integer);
+
+       for (i = 0; i < 2; i++) {
+               integer = bt_ctf_field_sequence_get_field(sequence, i);
+               if (ret) {
+                       fail("Failed to retrieve sequence element");
+                       goto end;
+               }
+
+               ret = bt_ctf_field_integer_unsigned_set_value(integer, i);
+               if (ret) {
+                       fail("Failed to set sequence element value");
+                       goto end;
+               }
+
+               bt_put(integer);
+               integer = NULL;
+       }
+
+       ret = bt_ctf_stream_append_event(stream, event);
+       if (ret) {
+               fail("Failed to append event to stream");
+               goto end;
+       }
+
+       ret = bt_ctf_stream_flush(stream);
+       if (ret) {
+               fail("Failed to flush custom_event_header stream");
+       }
+end:
+       bt_put(stream);
+       bt_put(stream_class);
+       bt_put(event_class);
+       bt_put(event);
+       bt_put(integer);
+       bt_put(sequence);
+       bt_put(event_header);
+       bt_put(packet_header);
+       bt_put(sequence_type);
+       bt_put(integer_type);
+       bt_put(event_header_type);
+}
+
+static
+void test_instanciate_event_before_stream(struct bt_ctf_writer *writer,
+               struct bt_ctf_clock *clock)
+{
+       int ret = 0;
+       struct bt_ctf_stream_class *stream_class = NULL;
+       struct bt_ctf_stream *stream = NULL,
+               *ret_stream = NULL;
+       struct bt_ctf_event_class *event_class = NULL;
+       struct bt_ctf_event *event = NULL;
+       struct bt_ctf_field_type *integer_type = NULL;
+       struct bt_ctf_field *payload_field = NULL;
+       struct bt_ctf_field *integer = NULL;
+
        stream_class = bt_ctf_stream_class_create("event_before_stream_test");
        if (!stream_class) {
                diag("Failed to create stream class");
@@ -1735,14 +1484,21 @@ void test_instanciate_event_before_stream(struct bt_ctf_writer *writer)
                goto end;
        }
 
-       integer = bt_ctf_event_get_payload_by_index(event, 0);
+       payload_field = bt_ctf_event_get_payload_field(event);
+       if (!payload_field) {
+               diag("Failed to get event's payload field");
+               ret = -1;
+               goto end;
+       }
+
+       integer = bt_ctf_field_structure_get_field_by_index(payload_field, 0);
        if (!integer) {
                diag("Failed to get integer field payload from event");
                ret = -1;
                goto end;
        }
 
-       ret = bt_ctf_field_unsigned_integer_set_value(integer, 1234);
+       ret = bt_ctf_field_integer_unsigned_set_value(integer, 1234);
        if (ret) {
                diag("Failed to set integer field value");
                goto end;
@@ -1755,11 +1511,6 @@ void test_instanciate_event_before_stream(struct bt_ctf_writer *writer)
                goto end;
        }
 
-       ok(bt_ctf_event_get_stream(NULL) == NULL,
-               "bt_ctf_event_get_stream handles NULL correctly");
-       ok(bt_ctf_event_get_stream(event) == NULL,
-               "bt_ctf_event_get_stream returns NULL on event which has not yet been appended to a stream");
-
        ret = bt_ctf_stream_append_event(stream, event);
        if (ret) {
                diag("Failed to append event to stream");
@@ -1772,54 +1523,80 @@ void test_instanciate_event_before_stream(struct bt_ctf_writer *writer)
 end:
        ok(ret == 0,
                "Create an event before instanciating its associated stream");
-       bt_ctf_trace_put(trace);
-       bt_ctf_stream_put(stream);
-       bt_ctf_stream_put(ret_stream);
-       bt_ctf_stream_class_put(stream_class);
-       bt_ctf_event_class_put(event_class);
-       bt_ctf_event_put(event);
-       bt_ctf_field_type_put(integer_type);
-       bt_ctf_field_put(integer);
-       bt_ctf_clock_put(clock);
+       bt_put(stream);
+       bt_put(ret_stream);
+       bt_put(stream_class);
+       bt_put(event_class);
+       bt_put(event);
+       bt_put(integer_type);
+       bt_put(integer);
+       bt_put(payload_field);
 }
 
+static
 void append_existing_event_class(struct bt_ctf_stream_class *stream_class)
 {
        struct bt_ctf_event_class *event_class;
 
-       assert(event_class = bt_ctf_event_class_create("Simple Event"));
-       ok(bt_ctf_stream_class_add_event_class(stream_class, event_class),
-               "two event classes with the same name cannot cohabit within the same stream class");
-       bt_ctf_event_class_put(event_class);
+       event_class = bt_ctf_event_class_create("Simple Event");
+       assert(event_class);
+       ok(bt_ctf_stream_class_add_event_class(stream_class, event_class) == 0,
+               "two event classes with the same name may cohabit within the same stream class");
+       bt_put(event_class);
 
        event_class = bt_ctf_event_class_create("different name, ok");
        assert(event_class);
-       assert(!bt_ctf_event_class_set_id(event_class, 11));
+       assert(!bt_ctf_event_class_set_id(event_class, 13));
        ok(bt_ctf_stream_class_add_event_class(stream_class, event_class),
                "two event classes with the same ID cannot cohabit within the same stream class");
-       bt_ctf_event_class_put(event_class);
+       bt_put(event_class);
+}
+
+static
+void test_clock_utils(void)
+{
+       int ret;
+       struct bt_ctf_clock *clock = NULL;
+
+       clock = bt_ctf_clock_create("water");
+       assert(clock);
+       ret = bt_ctf_clock_set_offset_s(clock, 1234);
+       assert(!ret);
+       ret = bt_ctf_clock_set_offset(clock, 1000);
+       assert(!ret);
+       ret = bt_ctf_clock_set_frequency(clock, 1000000000);
+       assert(!ret);
+       ret = bt_ctf_clock_set_frequency(clock, 1534);
+       assert(!ret);
+
+       BT_PUT(clock);
 }
 
 int main(int argc, char **argv)
 {
-       char trace_path[] = "/tmp/ctfwriter_XXXXXX";
-       char metadata_path[sizeof(trace_path) + 9];
+       const char *env_resize_length;
+       gchar *trace_path;
+       gchar *metadata_path;
        const char *clock_name = "test_clock";
        const char *clock_description = "This is a test clock";
        const char *returned_clock_name;
        const char *returned_clock_description;
        const uint64_t frequency = 1123456789;
-       const uint64_t offset_s = 1351530929945824323;
-       const uint64_t offset = 1234567;
+       const int64_t offset_s = 13515309;
+       const int64_t offset = 1234567;
+       int64_t get_offset_s,
+               get_offset;
        const uint64_t precision = 10;
        const int is_absolute = 0xFF;
        char *metadata_string;
        struct bt_ctf_writer *writer;
-       struct utsname name;
-       char hostname[BABELTRACE_HOST_NAME_MAX];
+       struct bt_utsname name = {"GNU/Linux", "testhost", "4.4.0-87-generic",
+               "#110-Ubuntu SMP Tue Jul 18 12:55:35 UTC 2017", "x86_64"};
        struct bt_ctf_clock *clock, *ret_clock;
+       struct bt_ctf_clock_class *ret_clock_class;
        struct bt_ctf_stream_class *stream_class, *ret_stream_class;
        struct bt_ctf_stream *stream1;
+       struct bt_ctf_stream *stream;
        const char *ret_string;
        const unsigned char *ret_uuid;
        unsigned char tmp_uuid[16] = { 0 };
@@ -1835,21 +1612,27 @@ int main(int argc, char **argv)
        struct bt_ctf_trace *trace;
        int ret;
        int64_t ret_int64_t;
-       struct bt_object *obj;
+       struct bt_value *obj;
 
-       if (argc < 3) {
-               printf("Usage: tests-ctf-writer path_to_ctf_parser_test path_to_babeltrace\n");
+       if (argc < 2) {
+               printf("Usage: tests-ctf-writer path_to_babeltrace\n");
                return -1;
        }
 
-       plan_no_plan();
+       env_resize_length = getenv("PACKET_RESIZE_TEST_LENGTH");
+       if (env_resize_length) {
+               packet_resize_test_length =
+                       (unsigned int) atoi(env_resize_length);
+       }
+
+       plan_tests(NR_TESTS);
 
-       if (!mkdtemp(trace_path)) {
+       trace_path = g_build_filename(g_get_tmp_dir(), "ctfwriter_XXXXXX", NULL);
+       if (!bt_mkdtemp(trace_path)) {
                perror("# perror");
        }
 
-       strcpy(metadata_path, trace_path);
-       strcat(metadata_path + sizeof(trace_path) - 1, "/metadata");
+       metadata_path = g_build_filename(trace_path, "metadata", NULL);
 
        writer = bt_ctf_writer_create(trace_path);
        ok(writer, "bt_ctf_create succeeds in creating trace with path");
@@ -1857,21 +1640,21 @@ int main(int argc, char **argv)
        ok(!bt_ctf_writer_get_trace(NULL),
                "bt_ctf_writer_get_trace correctly handles NULL");
        trace = bt_ctf_writer_get_trace(writer);
+       ok(bt_ctf_trace_set_native_byte_order(trace, BT_CTF_BYTE_ORDER_NATIVE),
+               "Cannot set a trace's byte order to BT_CTF_BYTE_ORDER_NATIVE");
+       ok(bt_ctf_trace_set_native_byte_order(trace, BT_CTF_BYTE_ORDER_UNSPECIFIED),
+               "Cannot set a trace's byte order to BT_CTF_BYTE_ORDER_UNSPECIFIED");
        ok(trace,
                "bt_ctf_writer_get_trace returns a bt_ctf_trace object");
-       ok(bt_ctf_trace_set_byte_order(trace, BT_CTF_BYTE_ORDER_BIG_ENDIAN) == 0,
+       ok(bt_ctf_trace_set_native_byte_order(trace, BT_CTF_BYTE_ORDER_BIG_ENDIAN) == 0,
                "Set a trace's byte order to big endian");
-       ok(bt_ctf_trace_get_byte_order(trace) == BT_CTF_BYTE_ORDER_BIG_ENDIAN,
-               "bt_ctf_trace_get_byte_order returns a correct endianness");
+       ok(bt_ctf_trace_get_native_byte_order(trace) == BT_CTF_BYTE_ORDER_BIG_ENDIAN,
+               "bt_ctf_trace_get_native_byte_order returns a correct endianness");
 
        /* Add environment context to the trace */
-       ret = gethostname(hostname, sizeof(hostname));
-       if (ret < 0) {
-               return ret;
-       }
-       ok(bt_ctf_writer_add_environment_field(writer, "host", hostname) == 0,
+       ok(bt_ctf_writer_add_environment_field(writer, "host", name.nodename) == 0,
                "Add host (%s) environment field to writer instance",
-               hostname);
+               name.nodename);
        ok(bt_ctf_writer_add_environment_field(NULL, "test_field",
                "test_value"),
                "bt_ctf_writer_add_environment_field error with NULL writer");
@@ -1883,7 +1666,7 @@ int main(int argc, char **argv)
                "bt_ctf_writer_add_environment_field error with NULL field value");
 
        /* Test bt_ctf_trace_set_environment_field with an integer object */
-       obj = bt_object_integer_create_init(23);
+       obj = bt_value_integer_create_init(23);
        assert(obj);
        ok(bt_ctf_trace_set_environment_field(NULL, "test_env_int_obj", obj),
                "bt_ctf_trace_set_environment_field handles a NULL trace correctly");
@@ -1893,14 +1676,14 @@ int main(int argc, char **argv)
                "bt_ctf_trace_set_environment_field handles a NULL value correctly");
        ok(!bt_ctf_trace_set_environment_field(trace, "test_env_int_obj", obj),
                "bt_ctf_trace_set_environment_field succeeds in adding an integer object");
-       BT_OBJECT_PUT(obj);
+       BT_PUT(obj);
 
        /* Test bt_ctf_trace_set_environment_field with a string object */
-       obj = bt_object_string_create_init("the value");
+       obj = bt_value_string_create_init("the value");
        assert(obj);
        ok(!bt_ctf_trace_set_environment_field(trace, "test_env_str_obj", obj),
                "bt_ctf_trace_set_environment_field succeeds in adding a string object");
-       BT_OBJECT_PUT(obj);
+       BT_PUT(obj);
 
        /* Test bt_ctf_trace_set_environment_field_integer */
        ok(bt_ctf_trace_set_environment_field_integer(NULL, "test_env_int",
@@ -1926,66 +1709,47 @@ int main(int argc, char **argv)
                "bt_ctf_trace_set_environment_field_string succeeds");
 
        /* Test bt_ctf_trace_get_environment_field_count */
-       ok(bt_ctf_trace_get_environment_field_count(NULL) < 0,
-               "bt_ctf_trace_get_environment_field_count handles a NULL trace correctly");
        ok(bt_ctf_trace_get_environment_field_count(trace) == 5,
                "bt_ctf_trace_get_environment_field_count returns a correct number of environment fields");
 
        /* Test bt_ctf_trace_get_environment_field_name */
-       ok(bt_ctf_trace_get_environment_field_name(NULL, 0) == NULL,
-               "bt_ctf_trace_get_environment_field_name handles a NULL trace correctly");
-       ok(bt_ctf_trace_get_environment_field_name(trace, -1) == NULL,
-               "bt_ctf_trace_get_environment_field_name handles an invalid index correctly (negative)");
-       ok(bt_ctf_trace_get_environment_field_name(trace, 5) == NULL,
-               "bt_ctf_trace_get_environment_field_name handles an invalid index correctly (too large)");
-       ret_string = bt_ctf_trace_get_environment_field_name(trace, 0);
+       ret_string = bt_ctf_trace_get_environment_field_name_by_index(trace, 0);
        ok(ret_string && !strcmp(ret_string, "host"),
                "bt_ctf_trace_get_environment_field_name returns a correct field name");
-       ret_string = bt_ctf_trace_get_environment_field_name(trace, 1);
+       ret_string = bt_ctf_trace_get_environment_field_name_by_index(trace, 1);
        ok(ret_string && !strcmp(ret_string, "test_env_int_obj"),
                "bt_ctf_trace_get_environment_field_name returns a correct field name");
-       ret_string = bt_ctf_trace_get_environment_field_name(trace, 2);
+       ret_string = bt_ctf_trace_get_environment_field_name_by_index(trace, 2);
        ok(ret_string && !strcmp(ret_string, "test_env_str_obj"),
                "bt_ctf_trace_get_environment_field_name returns a correct field name");
-       ret_string = bt_ctf_trace_get_environment_field_name(trace, 3);
+       ret_string = bt_ctf_trace_get_environment_field_name_by_index(trace, 3);
        ok(ret_string && !strcmp(ret_string, "test_env_int"),
                "bt_ctf_trace_get_environment_field_name returns a correct field name");
-       ret_string = bt_ctf_trace_get_environment_field_name(trace, 4);
+       ret_string = bt_ctf_trace_get_environment_field_name_by_index(trace, 4);
        ok(ret_string && !strcmp(ret_string, "test_env_str"),
                "bt_ctf_trace_get_environment_field_name returns a correct field name");
 
        /* Test bt_ctf_trace_get_environment_field_value */
-       ok(bt_ctf_trace_get_environment_field_value(NULL, 0) == NULL,
-               "bt_ctf_trace_get_environment_field_value handles a NULL trace correctly");
-       ok(bt_ctf_trace_get_environment_field_value(trace, -1) == NULL,
-               "bt_ctf_trace_get_environment_field_value handles an invalid index correctly (negative)");
-       ok(bt_ctf_trace_get_environment_field_value(trace, 5) == NULL,
-               "bt_ctf_trace_get_environment_field_value handles an invalid index correctly (too large)");
-       obj = bt_ctf_trace_get_environment_field_value(trace, 1);
-       ret = bt_object_integer_get(obj, &ret_int64_t);
+       obj = bt_ctf_trace_get_environment_field_value_by_index(trace, 1);
+       ret = bt_value_integer_get(obj, &ret_int64_t);
        ok(!ret && ret_int64_t == 23,
                "bt_ctf_trace_get_environment_field_value succeeds in getting an integer value");
-       BT_OBJECT_PUT(obj);
-       obj = bt_ctf_trace_get_environment_field_value(trace, 2);
-       ret = bt_object_string_get(obj, &ret_string);
+       BT_PUT(obj);
+       obj = bt_ctf_trace_get_environment_field_value_by_index(trace, 2);
+       ret = bt_value_string_get(obj, &ret_string);
        ok(!ret && ret_string && !strcmp(ret_string, "the value"),
                "bt_ctf_trace_get_environment_field_value succeeds in getting a string value");
-       BT_OBJECT_PUT(obj);
+       BT_PUT(obj);
 
        /* Test bt_ctf_trace_get_environment_field_value_by_name */
-       ok(!bt_ctf_trace_get_environment_field_value_by_name(NULL,
-               "test_env_str"),
-               "bt_ctf_trace_get_environment_field_value_by_name handles a NULL trace correctly");
-       ok(!bt_ctf_trace_get_environment_field_value_by_name(trace, NULL),
-               "bt_ctf_trace_get_environment_field_value_by_name handles a NULL name correctly");
        ok(!bt_ctf_trace_get_environment_field_value_by_name(trace, "oh oh"),
                "bt_ctf_trace_get_environment_field_value_by_name returns NULL or an unknown field name");
        obj = bt_ctf_trace_get_environment_field_value_by_name(trace,
                "test_env_str");
-       ret = bt_object_string_get(obj, &ret_string);
+       ret = bt_value_string_get(obj, &ret_string);
        ok(!ret && ret_string && !strcmp(ret_string, "oh yeah"),
                "bt_ctf_trace_get_environment_field_value_by_name succeeds in getting an existing field");
-       BT_OBJECT_PUT(obj);
+       BT_PUT(obj);
 
        /* Test environment field replacement */
        ok(!bt_ctf_trace_set_environment_field_integer(trace, "test_env_int",
@@ -1993,16 +1757,11 @@ int main(int argc, char **argv)
                "bt_ctf_trace_set_environment_field_integer succeeds with an existing name");
        ok(bt_ctf_trace_get_environment_field_count(trace) == 5,
                "bt_ctf_trace_set_environment_field_integer with an existing key does not increase the environment size");
-       obj = bt_ctf_trace_get_environment_field_value(trace, 3);
-       ret = bt_object_integer_get(obj, &ret_int64_t);
+       obj = bt_ctf_trace_get_environment_field_value_by_index(trace, 3);
+       ret = bt_value_integer_get(obj, &ret_int64_t);
        ok(!ret && ret_int64_t == 654321,
                "bt_ctf_trace_get_environment_field_value successfully replaces an existing field");
-       BT_OBJECT_PUT(obj);
-
-       if (uname(&name)) {
-               perror("uname");
-               return -1;
-       }
+       BT_PUT(obj);
 
        ok(bt_ctf_writer_add_environment_field(writer, "sysname", name.sysname)
                == 0, "Add sysname (%s) environment field to writer instance",
@@ -2024,7 +1783,6 @@ int main(int argc, char **argv)
        /* Define a clock and add it to the trace */
        ok(bt_ctf_clock_create("signed") == NULL,
                "Illegal clock name rejected");
-       ok(bt_ctf_clock_create(NULL) == NULL, "NULL clock name rejected");
        clock = bt_ctf_clock_create(clock_name);
        ok(clock, "Clock created sucessfully");
        returned_clock_name = bt_ctf_clock_get_name(clock);
@@ -2051,18 +1809,26 @@ int main(int argc, char **argv)
        ok(bt_ctf_clock_get_frequency(clock) == frequency,
                "bt_ctf_clock_get_frequency returns the correct frequency once it is set");
 
-       ok(bt_ctf_clock_get_offset_s(clock) == DEFAULT_CLOCK_OFFSET_S,
+       ok(bt_ctf_clock_get_offset_s(clock, &get_offset_s) == 0,
+               "bt_ctf_clock_get_offset_s succeeds");
+       ok(get_offset_s == DEFAULT_CLOCK_OFFSET_S,
                "bt_ctf_clock_get_offset_s returns the correct default offset (in seconds)");
        ok(bt_ctf_clock_set_offset_s(clock, offset_s) == 0,
                "Set clock offset (seconds)");
-       ok(bt_ctf_clock_get_offset_s(clock) == offset_s,
+       ok(bt_ctf_clock_get_offset_s(clock, &get_offset_s) == 0,
+               "bt_ctf_clock_get_offset_s succeeds");
+       ok(get_offset_s == offset_s,
                "bt_ctf_clock_get_offset_s returns the correct default offset (in seconds) once it is set");
 
-       ok(bt_ctf_clock_get_offset(clock) == DEFAULT_CLOCK_OFFSET,
-               "bt_ctf_clock_get_frequency returns the correct default offset (in ticks)");
+       ok(bt_ctf_clock_get_offset(clock, &get_offset) == 0,
+               "bt_ctf_clock_get_offset succeeds");
+       ok(get_offset == DEFAULT_CLOCK_OFFSET,
+               "bt_ctf_clock_get_offset returns the correct default offset (in ticks)");
        ok(bt_ctf_clock_set_offset(clock, offset) == 0, "Set clock offset");
-       ok(bt_ctf_clock_get_offset(clock) == offset,
-               "bt_ctf_clock_get_frequency returns the correct default offset (in ticks) once it is set");
+       ok(bt_ctf_clock_get_offset(clock, &get_offset) == 0,
+               "bt_ctf_clock_get_offset succeeds");
+       ok(get_offset == offset,
+               "bt_ctf_clock_get_offset returns the correct default offset (in ticks) once it is set");
 
        ok(bt_ctf_clock_get_precision(clock) == DEFAULT_CLOCK_PRECISION,
                "bt_ctf_clock_get_precision returns the correct default precision");
@@ -2077,79 +1843,8 @@ int main(int argc, char **argv)
                "Set clock absolute property");
        ok(bt_ctf_clock_get_is_absolute(clock) == !!is_absolute,
                "bt_ctf_clock_get_precision returns the correct is_absolute attribute once it is set");
-
-       ok(bt_ctf_clock_get_time(clock) == DEFAULT_CLOCK_TIME,
-               "bt_ctf_clock_get_time returns the correct default time");
        ok(bt_ctf_clock_set_time(clock, current_time) == 0,
                "Set clock time");
-       ok(bt_ctf_clock_get_time(clock) == current_time,
-               "bt_ctf_clock_get_time returns the correct time once it is set");
-
-       ok(bt_ctf_writer_add_clock(writer, clock) == 0,
-               "Add clock to writer instance");
-       ok(bt_ctf_writer_add_clock(writer, clock),
-               "Verify a clock can't be added twice to a writer instance");
-
-       ok(bt_ctf_trace_get_clock_count(NULL) < 0,
-               "bt_ctf_trace_get_clock_count correctly handles NULL");
-       ok(bt_ctf_trace_get_clock_count(trace) == 1,
-               "bt_ctf_trace_get_clock_count returns the correct number of clocks");
-       ok(!bt_ctf_trace_get_clock(NULL, 0),
-               "bt_ctf_trace_get_clock correctly handles NULL");
-       ok(!bt_ctf_trace_get_clock(trace, -1),
-               "bt_ctf_trace_get_clock correctly handles negative indexes");
-       ok(!bt_ctf_trace_get_clock(trace, 1),
-               "bt_ctf_trace_get_clock correctly handles out of bound accesses");
-       ret_clock = bt_ctf_trace_get_clock(trace, 0);
-       ok(ret_clock == clock,
-               "bt_ctf_trace_get_clock returns the right clock instance");
-       bt_ctf_clock_put(ret_clock);
-       ok(!bt_ctf_trace_get_clock_by_name(trace, NULL),
-               "bt_ctf_trace_get_clock_by_name correctly handles NULL (trace)");
-       ok(!bt_ctf_trace_get_clock_by_name(NULL, clock_name),
-               "bt_ctf_trace_get_clock_by_name correctly handles NULL (clock name)");
-       ok(!bt_ctf_trace_get_clock_by_name(NULL, NULL),
-               "bt_ctf_trace_get_clock_by_name correctly handles NULL (both)");
-       ret_clock = bt_ctf_trace_get_clock_by_name(trace, clock_name);
-       ok(ret_clock == clock,
-               "bt_ctf_trace_get_clock_by_name returns the right clock instance");
-       bt_ctf_clock_put(ret_clock);
-       ok(!bt_ctf_trace_get_clock_by_name(trace, "random"),
-               "bt_ctf_trace_get_clock_by_name fails when the requested clock doesn't exist");
-
-       ok(!bt_ctf_clock_get_name(NULL),
-               "bt_ctf_clock_get_name correctly handles NULL");
-       ok(!bt_ctf_clock_get_description(NULL),
-               "bt_ctf_clock_get_description correctly handles NULL");
-       ok(bt_ctf_clock_get_frequency(NULL) == -1ULL,
-               "bt_ctf_clock_get_frequency correctly handles NULL");
-       ok(bt_ctf_clock_get_precision(NULL) == -1ULL,
-               "bt_ctf_clock_get_precision correctly handles NULL");
-       ok(bt_ctf_clock_get_offset_s(NULL) == -1ULL,
-               "bt_ctf_clock_get_offset_s correctly handles NULL");
-       ok(bt_ctf_clock_get_offset(NULL) == -1ULL,
-               "bt_ctf_clock_get_offset correctly handles NULL");
-       ok(bt_ctf_clock_get_is_absolute(NULL) < 0,
-               "bt_ctf_clock_get_is_absolute correctly handles NULL");
-       ok(bt_ctf_clock_get_time(NULL) == -1ULL,
-               "bt_ctf_clock_get_time correctly handles NULL");
-
-       ok(bt_ctf_clock_set_description(NULL, NULL) < 0,
-               "bt_ctf_clock_set_description correctly handles NULL clock");
-       ok(bt_ctf_clock_set_frequency(NULL, frequency) < 0,
-               "bt_ctf_clock_set_frequency correctly handles NULL clock");
-       ok(bt_ctf_clock_set_precision(NULL, precision) < 0,
-               "bt_ctf_clock_get_precision correctly handles NULL clock");
-       ok(bt_ctf_clock_set_offset_s(NULL, offset_s) < 0,
-               "bt_ctf_clock_set_offset_s correctly handles NULL clock");
-       ok(bt_ctf_clock_set_offset(NULL, offset) < 0,
-               "bt_ctf_clock_set_offset correctly handles NULL clock");
-       ok(bt_ctf_clock_set_is_absolute(NULL, is_absolute) < 0,
-               "bt_ctf_clock_set_is_absolute correctly handles NULL clock");
-       ok(bt_ctf_clock_set_time(NULL, current_time) < 0,
-               "bt_ctf_clock_set_time correctly handles NULL clock");
-       ok(bt_ctf_clock_get_uuid(NULL) == NULL,
-               "bt_ctf_clock_get_uuid correctly handles NULL clock");
        ret_uuid = bt_ctf_clock_get_uuid(clock);
        ok(ret_uuid,
                "bt_ctf_clock_get_uuid returns a UUID");
@@ -2159,12 +1854,8 @@ int main(int argc, char **argv)
                tmp_uuid[sizeof(tmp_uuid) - 1]++;
        }
 
-       ok(bt_ctf_clock_set_uuid(NULL, tmp_uuid) < 0,
-               "bt_ctf_clock_set_uuid correctly handles a NULL clock");
-       ok(bt_ctf_clock_set_uuid(clock, NULL) < 0,
-               "bt_ctf_clock_set_uuid correctly handles a NULL UUID");
        ok(bt_ctf_clock_set_uuid(clock, tmp_uuid) == 0,
-               "bt_ctf_clock_set_uuid sets a new uuid succesfully");
+               "bt_ctf_clock_set_uuid sets a new uuid successfully");
        ret_uuid = bt_ctf_clock_get_uuid(clock);
        ok(ret_uuid,
                "bt_ctf_clock_get_uuid returns a UUID after setting a new one");
@@ -2173,9 +1864,6 @@ int main(int argc, char **argv)
 
        /* Define a stream class */
        stream_class = bt_ctf_stream_class_create("test_stream");
-
-       ok(bt_ctf_stream_class_get_name(NULL) == NULL,
-               "bt_ctf_stream_class_get_name handles NULL correctly");
        ret_string = bt_ctf_stream_class_get_name(stream_class);
        ok(ret_string && !strcmp(ret_string, "test_stream"),
                "bt_ctf_stream_class_get_name returns a correct stream class name");
@@ -2191,15 +1879,13 @@ int main(int argc, char **argv)
        ret_clock = bt_ctf_stream_class_get_clock(stream_class);
        ok(ret_clock == clock,
                "bt_ctf_stream_class_get_clock returns a correct clock");
-       bt_ctf_clock_put(ret_clock);
+       bt_put(ret_clock);
 
        /* Test the event fields and event types APIs */
        type_field_tests();
 
        ok(bt_ctf_stream_class_get_id(stream_class) < 0,
                "bt_ctf_stream_class_get_id returns an error when no id is set");
-       ok(bt_ctf_stream_class_get_id(NULL) < 0,
-               "bt_ctf_stream_class_get_id handles NULL correctly");
        ok(bt_ctf_stream_class_set_id(NULL, 123) < 0,
                "bt_ctf_stream_class_set_id handles NULL correctly");
        ok(bt_ctf_stream_class_set_id(stream_class, 123) == 0,
@@ -2208,13 +1894,11 @@ int main(int argc, char **argv)
                "bt_ctf_stream_class_get_id returns the correct value");
 
        /* Validate default event header fields */
-       ok(bt_ctf_stream_class_get_event_header_type(NULL) == NULL,
-               "bt_ctf_stream_class_get_event_header_type handles NULL correctly");
        ret_field_type = bt_ctf_stream_class_get_event_header_type(
                stream_class);
        ok(ret_field_type,
                "bt_ctf_stream_class_get_event_header_type returns an event header type");
-       ok(bt_ctf_field_type_get_type_id(ret_field_type) == CTF_TYPE_STRUCT,
+       ok(bt_ctf_field_type_get_type_id(ret_field_type) == BT_CTF_FIELD_TYPE_ID_STRUCT,
                "Default event header type is a structure");
        event_header_field_type =
                bt_ctf_field_type_structure_get_field_type_by_name(
@@ -2222,72 +1906,65 @@ int main(int argc, char **argv)
        ok(event_header_field_type,
                "Default event header type contains an \"id\" field");
        ok(bt_ctf_field_type_get_type_id(
-               event_header_field_type) == CTF_TYPE_INTEGER,
+               event_header_field_type) == BT_CTF_FIELD_TYPE_ID_INTEGER,
                "Default event header \"id\" field is an integer");
-       bt_ctf_field_type_put(event_header_field_type);
+       bt_put(event_header_field_type);
        event_header_field_type =
                bt_ctf_field_type_structure_get_field_type_by_name(
                ret_field_type, "timestamp");
        ok(event_header_field_type,
                "Default event header type contains a \"timestamp\" field");
        ok(bt_ctf_field_type_get_type_id(
-               event_header_field_type) == CTF_TYPE_INTEGER,
+               event_header_field_type) == BT_CTF_FIELD_TYPE_ID_INTEGER,
                "Default event header \"timestamp\" field is an integer");
-       bt_ctf_field_type_put(event_header_field_type);
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(event_header_field_type);
+       bt_put(ret_field_type);
 
        /* Add a custom trace packet header field */
-       ok(bt_ctf_trace_get_packet_header_type(NULL) == NULL,
-               "bt_ctf_trace_get_packet_header_type handles NULL correctly");
-       packet_header_type = bt_ctf_trace_get_packet_header_type(trace);
+       packet_header_type = bt_ctf_trace_get_packet_header_field_type(trace);
        ok(packet_header_type,
-               "bt_ctf_trace_get_packet_header_type returns a packet header");
-       ok(bt_ctf_field_type_get_type_id(packet_header_type) == CTF_TYPE_STRUCT,
-               "bt_ctf_trace_get_packet_header_type returns a packet header of type struct");
+               "bt_ctf_trace_get_packet_header_field_type returns a packet header");
+       ok(bt_ctf_field_type_get_type_id(packet_header_type) == BT_CTF_FIELD_TYPE_ID_STRUCT,
+               "bt_ctf_trace_get_packet_header_field_type returns a packet header of type struct");
        ret_field_type = bt_ctf_field_type_structure_get_field_type_by_name(
                packet_header_type, "magic");
        ok(ret_field_type, "Default packet header type contains a \"magic\" field");
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(ret_field_type);
        ret_field_type = bt_ctf_field_type_structure_get_field_type_by_name(
                packet_header_type, "uuid");
        ok(ret_field_type, "Default packet header type contains a \"uuid\" field");
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(ret_field_type);
        ret_field_type = bt_ctf_field_type_structure_get_field_type_by_name(
                packet_header_type, "stream_id");
        ok(ret_field_type, "Default packet header type contains a \"stream_id\" field");
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(ret_field_type);
 
        packet_header_field_type = bt_ctf_field_type_integer_create(22);
        ok(!bt_ctf_field_type_structure_add_field(packet_header_type,
                packet_header_field_type, "custom_trace_packet_header_field"),
                "Added a custom trace packet header field successfully");
 
-       ok(bt_ctf_trace_set_packet_header_type(NULL, packet_header_type) < 0,
-               "bt_ctf_trace_set_packet_header_type handles a NULL trace correctly");
-       ok(bt_ctf_trace_set_packet_header_type(trace, NULL) < 0,
-               "bt_ctf_trace_set_packet_header_type handles a NULL packet_header_type correctly");
-       ok(!bt_ctf_trace_set_packet_header_type(trace, packet_header_type),
+       ok(bt_ctf_trace_set_packet_header_field_type(NULL, packet_header_type) < 0,
+               "bt_ctf_trace_set_packet_header_field_type handles a NULL trace correctly");
+       ok(!bt_ctf_trace_set_packet_header_field_type(trace, packet_header_type),
                "Set a trace packet_header_type successfully");
 
-       ok(bt_ctf_stream_class_get_packet_context_type(NULL) == NULL,
-               "bt_ctf_stream_class_get_packet_context_type handles NULL correctly");
-
        /* Add a custom field to the stream class' packet context */
        packet_context_type = bt_ctf_stream_class_get_packet_context_type(stream_class);
        ok(packet_context_type,
                "bt_ctf_stream_class_get_packet_context_type returns a packet context type.");
-       ok(bt_ctf_field_type_get_type_id(packet_context_type) == CTF_TYPE_STRUCT,
+       ok(bt_ctf_field_type_get_type_id(packet_context_type) == BT_CTF_FIELD_TYPE_ID_STRUCT,
                "Packet context is a structure");
 
        ok(bt_ctf_stream_class_set_packet_context_type(NULL, packet_context_type),
                "bt_ctf_stream_class_set_packet_context_type handles a NULL stream class correctly");
-       ok(bt_ctf_stream_class_set_packet_context_type(stream_class, NULL),
-               "bt_ctf_stream_class_set_packet_context_type handles a NULL packet context type correctly");
 
        integer_type = bt_ctf_field_type_integer_create(32);
+
        ok(bt_ctf_stream_class_set_packet_context_type(stream_class,
                integer_type) < 0,
                "bt_ctf_stream_class_set_packet_context_type rejects a packet context that is not a structure");
+
        /* Create a "uint5_t" equivalent custom packet context field */
        packet_context_field_type = bt_ctf_field_type_integer_create(5);
 
@@ -2296,11 +1973,6 @@ int main(int argc, char **argv)
        ok(ret == 0, "Packet context field added successfully");
 
        /* Define a stream event context containing a my_integer field. */
-       ok(bt_ctf_stream_class_get_event_context_type(NULL) == NULL,
-               "bt_ctf_stream_class_get_event_context_type handles NULL correctly");
-       ok(bt_ctf_stream_class_get_event_context_type(
-               stream_class) == NULL,
-               "bt_ctf_stream_class_get_event_context_type returns NULL when no stream event context type was set.");
        stream_event_context_type = bt_ctf_field_type_structure_create();
        bt_ctf_field_type_structure_add_field(stream_event_context_type,
                integer_type, "common_event_context");
@@ -2308,9 +1980,6 @@ int main(int argc, char **argv)
        ok(bt_ctf_stream_class_set_event_context_type(NULL,
                stream_event_context_type) < 0,
                "bt_ctf_stream_class_set_event_context_type handles a NULL stream_class correctly");
-       ok(bt_ctf_stream_class_set_event_context_type(stream_class,
-               NULL) < 0,
-               "bt_ctf_stream_class_set_event_context_type handles a NULL event_context correctly");
        ok(bt_ctf_stream_class_set_event_context_type(stream_class,
                integer_type) < 0,
                "bt_ctf_stream_class_set_event_context_type validates that the event context os a structure");
@@ -2318,24 +1987,72 @@ int main(int argc, char **argv)
        ok(bt_ctf_stream_class_set_event_context_type(
                stream_class, stream_event_context_type) == 0,
                "Set a new stream event context type");
+
        ret_field_type = bt_ctf_stream_class_get_event_context_type(
                stream_class);
        ok(ret_field_type == stream_event_context_type,
                "bt_ctf_stream_class_get_event_context_type returns the correct field type.");
-       bt_ctf_field_type_put(ret_field_type);
+       bt_put(ret_field_type);
+
 
        /* Instantiate a stream and append events */
+       ret = bt_ctf_writer_add_clock(writer, clock);
+       assert(ret == 0);
+
+       ok(bt_ctf_trace_get_stream_count(trace) == 0,
+               "bt_ctf_trace_get_stream_count() succeeds and returns the correct value (0)");
        stream1 = bt_ctf_writer_create_stream(writer, stream_class);
        ok(stream1, "Instanciate a stream class from writer");
+       ok(bt_ctf_trace_get_stream_count(trace) == 1,
+               "bt_ctf_trace_get_stream_count() succeeds and returns the correct value (1)");
+       stream = bt_ctf_trace_get_stream_by_index(trace, 0);
+       ok(stream == stream1,
+               "bt_ctf_trace_get_stream_by_index() succeeds and returns the correct value");
+       BT_PUT(stream);
+
+       /*
+        * Creating a stream through a writer adds the given stream
+        * class to the writer's trace, thus registering the stream
+        * class's clock to the trace.
+        */
+       ok(bt_ctf_trace_get_clock_class_count(trace) == 1,
+               "bt_ctf_trace_get_clock_class_count returns the correct number of clocks");
+       ret_clock_class = bt_ctf_trace_get_clock_class_by_index(trace, 0);
+       ok(strcmp(bt_ctf_clock_class_get_name(ret_clock_class),
+               bt_ctf_clock_get_name(clock)) == 0,
+               "bt_ctf_trace_get_clock_class returns the right clock instance");
+       bt_put(ret_clock_class);
+       ret_clock_class = bt_ctf_trace_get_clock_class_by_name(trace, clock_name);
+       ok(strcmp(bt_ctf_clock_class_get_name(ret_clock_class),
+               bt_ctf_clock_get_name(clock)) == 0,
+               "bt_ctf_trace_get_clock_class returns the right clock instance");
+       bt_put(ret_clock_class);
+       ok(!bt_ctf_trace_get_clock_class_by_name(trace, "random"),
+               "bt_ctf_trace_get_clock_by_name fails when the requested clock doesn't exist");
 
-       ok(bt_ctf_stream_get_class(NULL) == NULL,
-               "bt_ctf_stream_get_class correctly handles NULL");
        ret_stream_class = bt_ctf_stream_get_class(stream1);
        ok(ret_stream_class,
                "bt_ctf_stream_get_class returns a stream class");
        ok(ret_stream_class == stream_class,
                "Returned stream class is of the correct type");
 
+       /*
+        * Packet header, packet context, event header, and stream
+        * event context types were copied for the resolving
+        * process
+        */
+       BT_PUT(packet_header_type);
+       BT_PUT(packet_context_type);
+       BT_PUT(stream_event_context_type);
+       packet_header_type = bt_ctf_trace_get_packet_header_field_type(trace);
+       assert(packet_header_type);
+       packet_context_type =
+               bt_ctf_stream_class_get_packet_context_type(stream_class);
+       assert(packet_context_type);
+       stream_event_context_type =
+               bt_ctf_stream_class_get_event_context_type(stream_class);
+       assert(stream_event_context_type);
+
        /*
         * Try to modify the packet context type after a stream has been
         * created.
@@ -2376,15 +2093,13 @@ int main(int argc, char **argv)
        ret_field_type = bt_ctf_field_get_type(packet_header);
        ok(ret_field_type == packet_header_type,
                "Stream returns a packet header of the appropriate type");
-       bt_ctf_field_type_put(ret_field_type);
-       packet_header_field = bt_ctf_field_structure_get_field(packet_header,
+       bt_put(ret_field_type);
+       packet_header_field = bt_ctf_field_structure_get_field_by_name(packet_header,
                "custom_trace_packet_header_field");
        ok(packet_header_field,
                "Packet header structure contains a custom field with the appropriate name");
        ret_field_type = bt_ctf_field_get_type(packet_header_field);
-       ok(ret_field_type == packet_header_field_type,
-               "Custom packet header field is of the expected type");
-       ok(!bt_ctf_field_unsigned_integer_set_value(packet_header_field,
+       ok(!bt_ctf_field_integer_unsigned_set_value(packet_header_field,
                54321), "Set custom packet header value successfully");
        ok(bt_ctf_stream_set_packet_header(stream1, NULL) < 0,
                "bt_ctf_stream_set_packet_header handles a NULL packet header correctly");
@@ -2398,7 +2113,9 @@ int main(int argc, char **argv)
        ok(bt_ctf_writer_add_environment_field(writer, "new_field", "test") == 0,
                "Add environment field to writer after stream creation");
 
-       test_instanciate_event_before_stream(writer);
+       test_clock_utils();
+
+       test_instanciate_event_before_stream(writer, clock);
 
        append_simple_event(stream_class, stream1, clock);
 
@@ -2410,48 +2127,35 @@ int main(int argc, char **argv)
 
        test_empty_stream(writer);
 
+       test_custom_event_header_stream(writer, clock);
+
        metadata_string = bt_ctf_writer_get_metadata_string(writer);
        ok(metadata_string, "Get metadata string");
 
        bt_ctf_writer_flush_metadata(writer);
-       validate_metadata(argv[1], metadata_path);
-       validate_trace(argv[2], trace_path);
-
-       bt_ctf_clock_put(clock);
-       bt_ctf_stream_class_put(ret_stream_class);
-       bt_ctf_writer_put(writer);
-       bt_ctf_stream_put(stream1);
-       bt_ctf_field_type_put(packet_context_type);
-       bt_ctf_field_type_put(packet_context_field_type);
-       bt_ctf_field_type_put(integer_type);
-       bt_ctf_field_type_put(stream_event_context_type);
-       bt_ctf_field_type_put(ret_field_type);
-       bt_ctf_field_type_put(packet_header_type);
-       bt_ctf_field_type_put(packet_header_field_type);
-       bt_ctf_field_put(packet_header);
-       bt_ctf_field_put(packet_header_field);
-       bt_ctf_trace_put(trace);
-       free(metadata_string);
 
-       ok(bt_ctf_stream_class_get_trace(stream_class) == NULL,
-               "bt_ctf_stream_class_get_trace returns NULL after its trace has been reclaimed");
-       bt_ctf_stream_class_put(stream_class);
+       bt_put(clock);
+       bt_put(ret_stream_class);
+       bt_put(writer);
+       bt_put(stream1);
+       bt_put(packet_context_type);
+       bt_put(packet_context_field_type);
+       bt_put(integer_type);
+       bt_put(stream_event_context_type);
+       bt_put(ret_field_type);
+       bt_put(packet_header_type);
+       bt_put(packet_header_field_type);
+       bt_put(packet_header);
+       bt_put(packet_header_field);
+       bt_put(trace);
+       free(metadata_string);
+       bt_put(stream_class);
 
-       /* Remove all trace files and delete temporary trace directory */
-       DIR *trace_dir = opendir(trace_path);
-       if (!trace_dir) {
-               perror("# opendir");
-               return -1;
-       }
+       validate_trace(argv[1], trace_path);
 
-       struct dirent *entry;
-       while ((entry = readdir(trace_dir))) {
-               if (entry->d_type == DT_REG) {
-                       unlinkat(dirfd(trace_dir), entry->d_name, 0);
-               }
-       }
+       recursive_rmdir(trace_path);
+       g_free(trace_path);
+       g_free(metadata_path);
 
-       rmdir(trace_path);
-       closedir(trace_dir);
        return 0;
 }
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