Handle negative time and offset from Epoch
[babeltrace.git] / tests / lib / test_ctf_writer.c
index ec06a97b75f3c8880d1504544a03ed0fc894b9dc..2929d24e638167ccb43da1af2bff33ec2665be88 100644 (file)
@@ -19,7 +19,6 @@
  * 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-types.h>
 #include <babeltrace/ctf-writer/event-fields.h>
 #include <babeltrace/ctf-ir/stream-class.h>
+#include <babeltrace/ref.h>
 #include <babeltrace/ctf/events.h>
+#include <babeltrace/values.h>
 #include <unistd.h>
-#include <stdlib.h>
+#include <babeltrace/compat/stdlib.h>
 #include <stdio.h>
 #include <sys/utsname.h>
 #include <babeltrace/compat/limits.h>
+#include <babeltrace/compat/stdio.h>
 #include <string.h>
 #include <assert.h>
 #include <sys/wait.h>
 #include <fcntl.h>
-#include <dirent.h>
+#include <babeltrace/compat/dirent.h>
 #include "tap/tap.h"
 #include <math.h>
 #include <float.h>
+#include <sys/stat.h>
 
 #define METADATA_LINE_SIZE 512
 #define SEQUENCE_TEST_LENGTH 10
@@ -54,7 +57,9 @@
 #define DEFAULT_CLOCK_IS_ABSOLUTE 0
 #define DEFAULT_CLOCK_TIME 0
 
-static uint64_t current_time = 42;
+#define NR_TESTS 597
+
+static int64_t current_time = 42;
 
 /* Return 1 if uuids match, zero if different. */
 int uuid_match(const unsigned char *uuid_a, const unsigned char *uuid_b)
@@ -158,12 +163,12 @@ result:
                rewind(metadata_fp);
 
                /* Output the metadata and parser output as diagnostic */
-               while (getline(&line, &len, metadata_fp) > 0) {
+               while (bt_getline(&line, &len, metadata_fp) > 0) {
                        fprintf(stderr, "# %s", line);
                }
 
                rewind(parser_output_fp);
-               while (getline(&line, &len, parser_output_fp) > 0) {
+               while (bt_getline(&line, &len, parser_output_fp) > 0) {
                        fprintf(stderr, "# %s", line);
                }
 
@@ -255,7 +260,7 @@ result:
                        diag("malloc error");
                }
                rewind(babeltrace_output_fp);
-               while (getline(&line, &len, babeltrace_output_fp) > 0) {
+               while (bt_getline(&line, &len, babeltrace_output_fp) > 0) {
                        diag("%s", line);
                }
 
@@ -275,6 +280,89 @@ close_fp:
        }
 }
 
+void event_copy_tests(struct bt_ctf_event *event)
+{
+       struct bt_ctf_event *copy;
+       struct bt_ctf_event_class *orig_event_class;
+       struct bt_ctf_event_class *copy_event_class;
+       struct bt_ctf_stream *orig_stream;
+       struct bt_ctf_stream *copy_stream;
+       struct bt_ctf_field *orig_field;
+       struct bt_ctf_field *copy_field;
+
+       /* copy */
+       ok(!bt_ctf_event_copy(NULL),
+               "bt_ctf_event_copy handles NULL correctly");
+       copy = bt_ctf_event_copy(event);
+       ok(copy, "bt_ctf_event_copy returns a valid pointer");
+
+       /* validate event class */
+       orig_event_class = bt_ctf_event_get_class(event);
+       assert(orig_event_class);
+       copy_event_class = bt_ctf_event_get_class(copy);
+       ok(orig_event_class == copy_event_class,
+               "original and copied events share the same event class pointer");
+       bt_put(orig_event_class);
+       bt_put(copy_event_class);
+
+       /* validate stream */
+       orig_stream = bt_ctf_event_get_stream(event);
+       copy_stream = bt_ctf_event_get_stream(copy);
+
+       if (!orig_stream) {
+               ok(!copy_stream, "original and copied events have no stream");
+       } else {
+               ok(orig_stream == copy_stream,
+                       "original and copied events share the same stream pointer");
+       }
+       bt_put(orig_stream);
+       bt_put(copy_stream);
+
+       /* header */
+       orig_field = bt_ctf_event_get_header(event);
+       copy_field = bt_ctf_event_get_header(copy);
+
+       if (!orig_field) {
+               ok(!copy_field, "original and copied events have no header");
+       } else {
+               ok(orig_field != copy_field,
+                       "original and copied events headers are different pointers");
+       }
+
+       bt_put(orig_field);
+       bt_put(copy_field);
+
+       /* context */
+       orig_field = bt_ctf_event_get_event_context(event);
+       copy_field = bt_ctf_event_get_event_context(copy);
+
+       if (!orig_field) {
+               ok(!copy_field, "original and copied events have no context");
+       } else {
+               ok(orig_field != copy_field,
+                       "original and copied events contexts are different pointers");
+       }
+
+       bt_put(orig_field);
+       bt_put(copy_field);
+
+       /* payload */
+       orig_field = bt_ctf_event_get_payload_field(event);
+       copy_field = bt_ctf_event_get_payload_field(copy);
+
+       if (!orig_field) {
+               ok(!copy_field, "original and copied events have no payload");
+       } else {
+               ok(orig_field != copy_field,
+                       "original and copied events payloads are different pointers");
+       }
+
+       bt_put(orig_field);
+       bt_put(copy_field);
+
+       bt_put(copy);
+}
+
 void append_simple_event(struct bt_ctf_stream_class *stream_class,
                struct bt_ctf_stream *stream, struct bt_ctf_clock *clock)
 {
@@ -327,7 +415,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        ok(!bt_ctf_field_type_enumeration_get_container_type(NULL), "bt_ctf_field_type_enumeration_get_container_type handles NULL correctly");
        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,
@@ -475,7 +563,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        returned_type = bt_ctf_event_class_get_context_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_put(returned_type);
 
        bt_ctf_stream_class_add_event_class(stream_class, simple_event_class);
 
@@ -490,7 +578,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        ret_event_class = bt_ctf_stream_class_get_event_class(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);
+       bt_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");
        ok(!bt_ctf_stream_class_get_event_class_by_id(stream_class, 2),
@@ -499,7 +587,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_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);
+       bt_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");
@@ -510,7 +598,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        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,
@@ -521,7 +609,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        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);
+       bt_put(clock);
 
        integer_field = bt_ctf_field_create(uint_12_type);
        bt_ctf_field_unsigned_integer_set_value(integer_field, 42);
@@ -565,7 +653,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        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(!strcmp(ret_char, mapping_name_test),
+       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");
 
        ok(bt_ctf_clock_set_time(clock, current_time) == 0, "Set clock time");
@@ -598,6 +686,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        ok(!bt_ctf_event_set_event_context(simple_event, event_context),
                "Set an event context successfully");
 
+       event_copy_tests(simple_event);
        ok(bt_ctf_stream_append_event(stream, simple_event) == 0,
                "Append simple event to trace stream");
 
@@ -611,7 +700,7 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
                "packet_size");
        ok(packet_context_field,
                "Packet context contains the default packet_size field.");
-       bt_ctf_field_put(packet_context_field);
+       bt_put(packet_context_field);
        packet_context_field = bt_ctf_field_structure_get_field(packet_context,
                "custom_packet_context_field");
        ok(bt_ctf_field_unsigned_integer_set_value(packet_context_field, 8) == 0,
@@ -627,35 +716,50 @@ void append_simple_event(struct bt_ctf_stream_class *stream_class,
        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);
 }
 
 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 = "Test string";
+       const char *test_string_1 = "Test ";
+       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 abcdeabcd";
        struct bt_ctf_field_type *uint_35_type =
                bt_ctf_field_type_integer_create(35);
        struct bt_ctf_field_type *int_16_type =
@@ -688,7 +792,16 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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_value *obj;
+
+       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)");
        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,
@@ -704,7 +817,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                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_put(ret_field_type);
 
        ok(bt_ctf_field_type_array_get_length(NULL) < 0,
                "bt_ctf_field_type_array_get_length handles NULL correctly");
@@ -756,12 +869,12 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        ret_field_type = bt_ctf_field_type_variant_get_tag_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_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,
@@ -773,7 +886,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                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");
@@ -782,9 +895,10 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
 
        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(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(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");
@@ -794,7 +908,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                "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_put(ret_field_type);
 
        bt_ctf_field_type_structure_add_field(complex_structure_type,
                enum_variant_type, "variant_selector");
@@ -841,6 +955,116 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        ok(bt_ctf_event_class_get_id(event_class) == 42,
                "bt_ctf_event_class_get_id returns the correct value");
 
+       /* Test event class attributes */
+       obj = bt_value_integer_create_init(15);
+       assert(obj);
+       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_value_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_value_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_PUT(obj);
+
+       obj = bt_value_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_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_value_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_PUT(obj);
+
+       obj = bt_value_string_create_init("nu name");
+       assert(obj);
+       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_PUT(obj);
+       obj = bt_value_string_create_init("http://kernel.org/");
+       assert(obj);
+       assert(!bt_ctf_event_class_set_attribute(event_class, "model.emf.uri", obj));
+       BT_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_value_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_value_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_value_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_value_is_string(obj),
+                               "bt_ctf_event_class_get_attribute_value returns the correct type (\"%s\")",
+                               ret_string);
+               } else {
+                       attrs_count.unknown++;
+               }
+
+               BT_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");
+
        /* Add event class to the stream class */
        ok(bt_ctf_stream_class_add_event_class(stream_class, NULL),
                "Reject addition of NULL event class to a stream class");
@@ -852,7 +1076,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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);
+       bt_put(ret_stream_class);
 
        ok(bt_ctf_event_class_get_field_count(NULL) < 0,
                "bt_ctf_event_class_get_field_count handles NULL correctly");
@@ -863,10 +1087,11 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                &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,
+               &ret_field_type, 0) == 0,
                "bt_ctf_event_class_get_field handles a NULL field name correctly");
+       bt_put(ret_field_type);
        ok(bt_ctf_event_class_get_field(event_class, &ret_string,
-               NULL, 0) < 0,
+               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,
@@ -876,7 +1101,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                "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);
+       bt_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,
@@ -889,7 +1114,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_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");
@@ -899,7 +1124,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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) {
@@ -920,7 +1145,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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_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);
@@ -936,7 +1161,7 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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_put(int_16_field);
 
        complex_structure_field = bt_ctf_event_get_payload(event,
                "complex_structure");
@@ -948,10 +1173,10 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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);
+       bt_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(ret_field_type);
 
        inner_structure_field = bt_ctf_field_structure_get_field(
                complex_structure_field, "inner_structure");
@@ -974,16 +1199,35 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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);
+       bt_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_string_set_value(a_string_field,
-               test_string);
+               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(NULL, "oh noes", 3),
+               "bt_ctf_field_string_append_len correctly handles a NULL string field");
+       ok(bt_ctf_field_string_append_len(a_string_field, NULL, 3),
+               "bt_ctf_field_string_append_len correctly handles a NULL string value");
+       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, 10),
+               "bt_ctf_field_string_append_len succeeds (append 4 characters)");
+       ok(!bt_ctf_field_string_append_len(a_string_field, &test_string_4[4], 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) : 0,
+       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,
                SEQUENCE_TEST_LENGTH);
@@ -1013,14 +1257,14 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
                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_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_put(int_16_field);
        }
 
        bt_ctf_clock_set_time(clock, ++current_time);
@@ -1039,31 +1283,558 @@ void append_complex_event(struct bt_ctf_stream_class *stream_class,
        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(ret_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 field_copy_tests_validate_same_type(struct bt_ctf_field *field,
+       struct bt_ctf_field_type *expected_type, const char *name)
+{
+       struct bt_ctf_field_type *copy_type;
+
+       copy_type = bt_ctf_field_get_type(field);
+       ok(copy_type == expected_type,
+               "bt_ctf_field_copy does not copy the type (%s)", name);
+       bt_put(copy_type);
+}
+
+static void field_copy_tests_validate_diff_ptrs(struct bt_ctf_field *field_a,
+       struct bt_ctf_field *field_b, const char *name)
+{
+       ok(field_a != field_b,
+               "bt_ctf_field_copy creates different pointers (%s)", name);
+}
+
+void field_copy_tests()
+{
+       struct bt_ctf_field_type *len_type = NULL;
+       struct bt_ctf_field_type *fp_type = NULL;
+       struct bt_ctf_field_type *s_type = NULL;
+       struct bt_ctf_field_type *e_int_type = NULL;
+       struct bt_ctf_field_type *e_type = NULL;
+       struct bt_ctf_field_type *v_type = NULL;
+       struct bt_ctf_field_type *v_label1_type = NULL;
+       struct bt_ctf_field_type *v_label1_array_type = NULL;
+       struct bt_ctf_field_type *v_label2_type = NULL;
+       struct bt_ctf_field_type *v_label2_seq_type = NULL;
+       struct bt_ctf_field_type *strct_type = NULL;
+       struct bt_ctf_field *len = NULL;
+       struct bt_ctf_field *fp = NULL;
+       struct bt_ctf_field *s = NULL;
+       struct bt_ctf_field *e_int = NULL;
+       struct bt_ctf_field *e = NULL;
+       struct bt_ctf_field *v = NULL;
+       struct bt_ctf_field *v_selected = NULL;
+       struct bt_ctf_field *v_selected_cur = NULL;
+       struct bt_ctf_field *v_selected_0 = NULL;
+       struct bt_ctf_field *v_selected_1 = NULL;
+       struct bt_ctf_field *v_selected_2 = NULL;
+       struct bt_ctf_field *v_selected_3 = NULL;
+       struct bt_ctf_field *v_selected_4 = NULL;
+       struct bt_ctf_field *v_selected_5 = NULL;
+       struct bt_ctf_field *v_selected_6 = NULL;
+       struct bt_ctf_field *a = NULL;
+       struct bt_ctf_field *a_0 = NULL;
+       struct bt_ctf_field *a_1 = NULL;
+       struct bt_ctf_field *a_2 = NULL;
+       struct bt_ctf_field *a_3 = NULL;
+       struct bt_ctf_field *a_4 = NULL;
+       struct bt_ctf_field *strct = NULL;
+       struct bt_ctf_field *len_copy = NULL;
+       struct bt_ctf_field *fp_copy = NULL;
+       struct bt_ctf_field *s_copy = NULL;
+       struct bt_ctf_field *e_int_copy = NULL;
+       struct bt_ctf_field *e_copy = NULL;
+       struct bt_ctf_field *v_copy = NULL;
+       struct bt_ctf_field *v_selected_copy = NULL;
+       struct bt_ctf_field *v_selected_copy_len = NULL;
+       struct bt_ctf_field *v_selected_0_copy = NULL;
+       struct bt_ctf_field *v_selected_1_copy = NULL;
+       struct bt_ctf_field *v_selected_2_copy = NULL;
+       struct bt_ctf_field *v_selected_3_copy = NULL;
+       struct bt_ctf_field *v_selected_4_copy = NULL;
+       struct bt_ctf_field *v_selected_5_copy = NULL;
+       struct bt_ctf_field *v_selected_6_copy = NULL;
+       struct bt_ctf_field *a_copy = NULL;
+       struct bt_ctf_field *a_0_copy = NULL;
+       struct bt_ctf_field *a_1_copy = NULL;
+       struct bt_ctf_field *a_2_copy = NULL;
+       struct bt_ctf_field *a_3_copy = NULL;
+       struct bt_ctf_field *a_4_copy = NULL;
+       struct bt_ctf_field *strct_copy = NULL;
+       uint64_t uint64_t_val;
+       const char *str_val;
+       double double_val;
+       int ret;
+
+       /* create len type */
+       len_type = bt_ctf_field_type_integer_create(32);
+       assert(len_type);
+
+       /* create fp type */
+       fp_type = bt_ctf_field_type_floating_point_create();
+       assert(fp_type);
+
+       /* create s type */
+       s_type = bt_ctf_field_type_string_create();
+       assert(s_type);
+
+       /* create e_int type */
+       e_int_type = bt_ctf_field_type_integer_create(8);
+       assert(e_int_type);
+
+       /* create e type */
+       e_type = bt_ctf_field_type_enumeration_create(e_int_type);
+       assert(e_type);
+       ret = bt_ctf_field_type_enumeration_add_mapping(e_type, "LABEL1",
+               10, 15);
+       assert(!ret);
+       ret = bt_ctf_field_type_enumeration_add_mapping(e_type, "LABEL2",
+               23, 23);
+       assert(!ret);
+
+       /* create v_label1 type */
+       v_label1_type = bt_ctf_field_type_string_create();
+       assert(v_label1_type);
+
+       /* create v_label1_array type */
+       v_label1_array_type = bt_ctf_field_type_array_create(v_label1_type, 5);
+       assert(v_label1_array_type);
+
+       /* create v_label2 type */
+       v_label2_type = bt_ctf_field_type_integer_create(16);
+       assert(v_label2_type);
+
+       /* create v_label2_seq type */
+       v_label2_seq_type = bt_ctf_field_type_sequence_create(v_label2_type,
+               "len");
+       assert(v_label2_seq_type);
+
+       /* create v type */
+       v_type = bt_ctf_field_type_variant_create(e_type, "e");
+       assert(v_type);
+       ret = bt_ctf_field_type_variant_add_field(v_type, v_label1_array_type,
+               "LABEL1");
+       assert(!ret);
+       ret = bt_ctf_field_type_variant_add_field(v_type, v_label2_seq_type,
+               "LABEL2");
+       assert(!ret);
+
+       /* create strct type */
+       strct_type = bt_ctf_field_type_structure_create();
+       assert(strct_type);
+       ret = bt_ctf_field_type_structure_add_field(strct_type, len_type,
+               "len");
+       assert(!ret);
+       ret = bt_ctf_field_type_structure_add_field(strct_type, fp_type, "fp");
+       assert(!ret);
+       ret = bt_ctf_field_type_structure_add_field(strct_type, s_type, "s");
+       assert(!ret);
+       ret = bt_ctf_field_type_structure_add_field(strct_type, e_type, "e");
+       assert(!ret);
+       ret = bt_ctf_field_type_structure_add_field(strct_type, v_type, "v");
+       assert(!ret);
+       ret = bt_ctf_field_type_structure_add_field(strct_type,
+               v_label1_array_type, "a");
+       assert(!ret);
+
+       /* create strct */
+       strct = bt_ctf_field_create(strct_type);
+       assert(strct);
+
+       /* get len field */
+       len = bt_ctf_field_structure_get_field(strct, "len");
+       assert(len);
+
+       /* get fp field */
+       fp = bt_ctf_field_structure_get_field(strct, "fp");
+       assert(fp);
+
+       /* get s field */
+       s = bt_ctf_field_structure_get_field(strct, "s");
+       assert(s);
+
+       /* get e field */
+       e = bt_ctf_field_structure_get_field(strct, "e");
+       assert(e);
+
+       /* get e_int (underlying integer) */
+       e_int = bt_ctf_field_enumeration_get_container(e);
+       assert(e_int);
+
+       /* get v field */
+       v = bt_ctf_field_structure_get_field(strct, "v");
+       assert(v);
+
+       /* get a field */
+       a = bt_ctf_field_structure_get_field(strct, "a");
+       assert(a);
+
+       /* set len field */
+       ret = bt_ctf_field_unsigned_integer_set_value(len, 7);
+       assert(!ret);
+
+       /* set fp field */
+       ret = bt_ctf_field_floating_point_set_value(fp, 3.14);
+       assert(!ret);
+
+       /* set s field */
+       ret = bt_ctf_field_string_set_value(s, "btbt");
+       assert(!ret);
+
+       /* set e field (LABEL2) */
+       ret = bt_ctf_field_unsigned_integer_set_value(e_int, 23);
+       assert(!ret);
+
+       /* set v field */
+       v_selected = bt_ctf_field_variant_get_field(v, e);
+       assert(v_selected);
+       ok(!bt_ctf_field_variant_get_current_field(NULL),
+               "bt_ctf_field_variant_get_current_field handles NULL correctly");
+       v_selected_cur = bt_ctf_field_variant_get_current_field(v);
+       ok(v_selected_cur == v_selected,
+               "bt_ctf_field_variant_get_current_field returns the current field");
+       bt_put(v_selected_cur);
+
+       /* set selected v field */
+       ret = bt_ctf_field_sequence_set_length(v_selected, len);
+       assert(!ret);
+       v_selected_0 = bt_ctf_field_sequence_get_field(v_selected, 0);
+       assert(v_selected_0);
+       ret = bt_ctf_field_unsigned_integer_set_value(v_selected_0, 7);
+       assert(!ret);
+       v_selected_1 = bt_ctf_field_sequence_get_field(v_selected, 1);
+       assert(v_selected_1);
+       ret = bt_ctf_field_unsigned_integer_set_value(v_selected_1, 6);
+       assert(!ret);
+       v_selected_2 = bt_ctf_field_sequence_get_field(v_selected, 2);
+       assert(v_selected_2);
+       ret = bt_ctf_field_unsigned_integer_set_value(v_selected_2, 5);
+       assert(!ret);
+       v_selected_3 = bt_ctf_field_sequence_get_field(v_selected, 3);
+       assert(v_selected_3);
+       ret = bt_ctf_field_unsigned_integer_set_value(v_selected_3, 4);
+       assert(!ret);
+       v_selected_4 = bt_ctf_field_sequence_get_field(v_selected, 4);
+       assert(v_selected_4);
+       ret = bt_ctf_field_unsigned_integer_set_value(v_selected_4, 3);
+       assert(!ret);
+       v_selected_5 = bt_ctf_field_sequence_get_field(v_selected, 5);
+       assert(v_selected_5);
+       ret = bt_ctf_field_unsigned_integer_set_value(v_selected_5, 2);
+       assert(!ret);
+       v_selected_6 = bt_ctf_field_sequence_get_field(v_selected, 6);
+       assert(v_selected_6);
+       ret = bt_ctf_field_unsigned_integer_set_value(v_selected_6, 1);
+       assert(!ret);
+
+       /* set a field */
+       a_0 = bt_ctf_field_array_get_field(a, 0);
+       assert(a_0);
+       ret = bt_ctf_field_string_set_value(a_0, "a_0");
+       assert(!ret);
+       a_1 = bt_ctf_field_array_get_field(a, 1);
+       assert(a_1);
+       ret = bt_ctf_field_string_set_value(a_1, "a_1");
+       assert(!ret);
+       a_2 = bt_ctf_field_array_get_field(a, 2);
+       assert(a_2);
+       ret = bt_ctf_field_string_set_value(a_2, "a_2");
+       assert(!ret);
+       a_3 = bt_ctf_field_array_get_field(a, 3);
+       assert(a_3);
+       ret = bt_ctf_field_string_set_value(a_3, "a_3");
+       assert(!ret);
+       a_4 = bt_ctf_field_array_get_field(a, 4);
+       assert(a_4);
+       ret = bt_ctf_field_string_set_value(a_4, "a_4");
+       assert(!ret);
+
+       /* create copy of strct */
+       ok(!bt_ctf_field_copy(NULL),
+               "bt_ctf_field_copy handles NULL correctly");
+       strct_copy = bt_ctf_field_copy(strct);
+       ok(strct_copy,
+               "bt_ctf_field_copy returns a valid pointer");
+
+       /* get all copied fields */
+       len_copy = bt_ctf_field_structure_get_field(strct_copy, "len");
+       assert(len_copy);
+       fp_copy = bt_ctf_field_structure_get_field(strct_copy, "fp");
+       assert(fp_copy);
+       s_copy = bt_ctf_field_structure_get_field(strct_copy, "s");
+       assert(s_copy);
+       e_copy = bt_ctf_field_structure_get_field(strct_copy, "e");
+       assert(e_copy);
+       e_int_copy = bt_ctf_field_enumeration_get_container(e_copy);
+       assert(e_int_copy);
+       v_copy = bt_ctf_field_structure_get_field(strct_copy, "v");
+       assert(v_copy);
+       v_selected_copy = bt_ctf_field_variant_get_field(v_copy, e_copy);
+       assert(v_selected_copy);
+       v_selected_0_copy = bt_ctf_field_sequence_get_field(v_selected_copy, 0);
+       assert(v_selected_0_copy);
+       v_selected_1_copy = bt_ctf_field_sequence_get_field(v_selected_copy, 1);
+       assert(v_selected_1_copy);
+       v_selected_2_copy = bt_ctf_field_sequence_get_field(v_selected_copy, 2);
+       assert(v_selected_2_copy);
+       v_selected_3_copy = bt_ctf_field_sequence_get_field(v_selected_copy, 3);
+       assert(v_selected_3_copy);
+       v_selected_4_copy = bt_ctf_field_sequence_get_field(v_selected_copy, 4);
+       assert(v_selected_4_copy);
+       v_selected_5_copy = bt_ctf_field_sequence_get_field(v_selected_copy, 5);
+       assert(v_selected_5_copy);
+       v_selected_6_copy = bt_ctf_field_sequence_get_field(v_selected_copy, 6);
+       assert(v_selected_6_copy);
+       ok(!bt_ctf_field_sequence_get_field(v_selected_copy, 7),
+               "sequence field copy is not too large");
+       a_copy = bt_ctf_field_structure_get_field(strct_copy, "a");
+       assert(a_copy);
+       a_0_copy = bt_ctf_field_array_get_field(a_copy, 0);
+       assert(a_0_copy);
+       a_1_copy = bt_ctf_field_array_get_field(a_copy, 1);
+       assert(a_1_copy);
+       a_2_copy = bt_ctf_field_array_get_field(a_copy, 2);
+       assert(a_2_copy);
+       a_3_copy = bt_ctf_field_array_get_field(a_copy, 3);
+       assert(a_3_copy);
+       a_4_copy = bt_ctf_field_array_get_field(a_copy, 4);
+       assert(a_4_copy);
+       ok(!bt_ctf_field_array_get_field(v_selected_copy, 5),
+               "array field copy is not too large");
+
+       /* make sure copied fields are different pointers */
+       field_copy_tests_validate_diff_ptrs(strct_copy, strct, "strct");
+       field_copy_tests_validate_diff_ptrs(len_copy, len, "len");
+       field_copy_tests_validate_diff_ptrs(fp_copy, fp, "fp");
+       field_copy_tests_validate_diff_ptrs(s_copy, s, "s");
+       field_copy_tests_validate_diff_ptrs(e_int_copy, e_int, "e_int");
+       field_copy_tests_validate_diff_ptrs(e_copy, e, "e");
+       field_copy_tests_validate_diff_ptrs(v_copy, v, "v");
+       field_copy_tests_validate_diff_ptrs(v_selected_copy, v_selected,
+               "v_selected");
+       field_copy_tests_validate_diff_ptrs(v_selected_0_copy, v_selected_0,
+               "v_selected_0");
+       field_copy_tests_validate_diff_ptrs(v_selected_1_copy, v_selected_1,
+               "v_selected_1");
+       field_copy_tests_validate_diff_ptrs(v_selected_2_copy, v_selected_2,
+               "v_selected_2");
+       field_copy_tests_validate_diff_ptrs(v_selected_3_copy, v_selected_3,
+               "v_selected_3");
+       field_copy_tests_validate_diff_ptrs(v_selected_4_copy, v_selected_4,
+               "v_selected_4");
+       field_copy_tests_validate_diff_ptrs(v_selected_5_copy, v_selected_5,
+               "v_selected_5");
+       field_copy_tests_validate_diff_ptrs(v_selected_6_copy, v_selected_6,
+               "v_selected_6");
+       field_copy_tests_validate_diff_ptrs(a_copy, a, "a");
+       field_copy_tests_validate_diff_ptrs(a_0_copy, a_0, "a_0");
+       field_copy_tests_validate_diff_ptrs(a_1_copy, a_1, "a_1");
+       field_copy_tests_validate_diff_ptrs(a_2_copy, a_2, "a_2");
+       field_copy_tests_validate_diff_ptrs(a_3_copy, a_3, "a_3");
+       field_copy_tests_validate_diff_ptrs(a_4_copy, a_4, "a_4");
+
+       /* make sure copied fields share the same types */
+       field_copy_tests_validate_same_type(strct_copy, strct_type, "strct");
+       field_copy_tests_validate_same_type(len_copy, len_type, "len");
+       field_copy_tests_validate_same_type(fp_copy, fp_type, "fp");
+       field_copy_tests_validate_same_type(e_int_copy, e_int_type, "e_int");
+       field_copy_tests_validate_same_type(e_copy, e_type, "e");
+       field_copy_tests_validate_same_type(v_copy, v_type, "v");
+       field_copy_tests_validate_same_type(v_selected_copy, v_label2_seq_type,
+               "v_selected");
+       field_copy_tests_validate_same_type(v_selected_0_copy, v_label2_type,
+               "v_selected_0");
+       field_copy_tests_validate_same_type(v_selected_1_copy, v_label2_type,
+               "v_selected_1");
+       field_copy_tests_validate_same_type(v_selected_2_copy, v_label2_type,
+               "v_selected_2");
+       field_copy_tests_validate_same_type(v_selected_3_copy, v_label2_type,
+               "v_selected_3");
+       field_copy_tests_validate_same_type(v_selected_4_copy, v_label2_type,
+               "v_selected_4");
+       field_copy_tests_validate_same_type(v_selected_5_copy, v_label2_type,
+               "v_selected_5");
+       field_copy_tests_validate_same_type(v_selected_6_copy, v_label2_type,
+               "v_selected_6");
+       field_copy_tests_validate_same_type(a_copy, v_label1_array_type, "a");
+       field_copy_tests_validate_same_type(a_0_copy, v_label1_type, "a_0");
+       field_copy_tests_validate_same_type(a_1_copy, v_label1_type, "a_1");
+       field_copy_tests_validate_same_type(a_2_copy, v_label1_type, "a_2");
+       field_copy_tests_validate_same_type(a_3_copy, v_label1_type, "a_3");
+       field_copy_tests_validate_same_type(a_4_copy, v_label1_type, "a_4");
+
+       /* validate len copy */
+       ret = bt_ctf_field_unsigned_integer_get_value(len_copy, &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 7,
+               "bt_ctf_field_copy creates a valid integer field copy");
+
+       /* validate fp copy */
+       ret = bt_ctf_field_floating_point_get_value(fp_copy, &double_val);
+       assert(!ret);
+       ok(double_val == 3.14,
+               "bt_ctf_field_copy creates a valid floating point number field copy");
+
+       /* validate s copy */
+       str_val = bt_ctf_field_string_get_value(s_copy);
+       ok(str_val && !strcmp(str_val, "btbt"),
+               "bt_ctf_field_copy creates a valid string field copy");
+
+       /* validate e_int copy */
+       ret = bt_ctf_field_unsigned_integer_get_value(e_int_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 23,
+               "bt_ctf_field_copy creates a valid enum's integer field copy");
+
+       /* validate e copy */
+       str_val = bt_ctf_field_enumeration_get_mapping_name(e_copy);
+       ok(str_val && !strcmp(str_val, "LABEL2"),
+               "bt_ctf_field_copy creates a valid enum field copy");
+
+       /* validate v_selected copy */
+       v_selected_copy_len = bt_ctf_field_sequence_get_length(v_selected);
+       assert(v_selected_copy_len);
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_copy_len,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 7,
+               "bt_ctf_field_copy creates a sequence field copy with the proper length");
+       bt_put(v_selected_copy_len);
+       v_selected_copy_len = NULL;
+
+       /* validate v_selected copy fields */
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_0_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 7,
+               "bt_ctf_field_copy creates a valid sequence field element copy (v_selected_0)");
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_1_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 6,
+               "bt_ctf_field_copy creates a valid sequence field element copy (v_selected_1)");
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_2_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 5,
+               "bt_ctf_field_copy creates a valid sequence field element copy (v_selected_2)");
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_3_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 4,
+               "bt_ctf_field_copy creates a valid sequence field element copy (v_selected_3)");
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_4_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 3,
+               "bt_ctf_field_copy creates a valid sequence field element copy (v_selected_4)");
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_5_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 2,
+               "bt_ctf_field_copy creates a valid sequence field element copy (v_selected_5)");
+       ret = bt_ctf_field_unsigned_integer_get_value(v_selected_6_copy,
+               &uint64_t_val);
+       assert(!ret);
+       ok(uint64_t_val == 1,
+               "bt_ctf_field_copy creates a valid sequence field element copy (v_selected_6)");
+
+       /* validate a copy fields */
+       str_val = bt_ctf_field_string_get_value(a_0_copy);
+       ok(str_val && !strcmp(str_val, "a_0"),
+               "bt_ctf_field_copy creates a valid array field element copy (a_0)");
+       str_val = bt_ctf_field_string_get_value(a_1_copy);
+       ok(str_val && !strcmp(str_val, "a_1"),
+               "bt_ctf_field_copy creates a valid array field element copy (a_1)");
+       str_val = bt_ctf_field_string_get_value(a_2_copy);
+       ok(str_val && !strcmp(str_val, "a_2"),
+               "bt_ctf_field_copy creates a valid array field element copy (a_2)");
+       str_val = bt_ctf_field_string_get_value(a_3_copy);
+       ok(str_val && !strcmp(str_val, "a_3"),
+               "bt_ctf_field_copy creates a valid array field element copy (a_3)");
+       str_val = bt_ctf_field_string_get_value(a_4_copy);
+       ok(str_val && !strcmp(str_val, "a_4"),
+               "bt_ctf_field_copy creates a valid array field element copy (a_4)");
+
+       /* put everything */
+       bt_put(len_type);
+       bt_put(fp_type);
+       bt_put(s_type);
+       bt_put(e_int_type);
+       bt_put(e_type);
+       bt_put(v_type);
+       bt_put(v_label1_type);
+       bt_put(v_label1_array_type);
+       bt_put(v_label2_type);
+       bt_put(v_label2_seq_type);
+       bt_put(strct_type);
+       bt_put(len);
+       bt_put(fp);
+       bt_put(s);
+       bt_put(e_int);
+       bt_put(e);
+       bt_put(v);
+       bt_put(v_selected);
+       bt_put(v_selected_0);
+       bt_put(v_selected_1);
+       bt_put(v_selected_2);
+       bt_put(v_selected_3);
+       bt_put(v_selected_4);
+       bt_put(v_selected_5);
+       bt_put(v_selected_6);
+       bt_put(a);
+       bt_put(a_0);
+       bt_put(a_1);
+       bt_put(a_2);
+       bt_put(a_3);
+       bt_put(a_4);
+       bt_put(strct);
+       bt_put(len_copy);
+       bt_put(fp_copy);
+       bt_put(s_copy);
+       bt_put(e_int_copy);
+       bt_put(e_copy);
+       bt_put(v_copy);
+       bt_put(v_selected_copy);
+       bt_put(v_selected_0_copy);
+       bt_put(v_selected_1_copy);
+       bt_put(v_selected_2_copy);
+       bt_put(v_selected_3_copy);
+       bt_put(v_selected_4_copy);
+       bt_put(v_selected_5_copy);
+       bt_put(v_selected_6_copy);
+       bt_put(a_copy);
+       bt_put(a_0_copy);
+       bt_put(a_1_copy);
+       bt_put(a_2_copy);
+       bt_put(a_3_copy);
+       bt_put(a_4_copy);
+       bt_put(strct_copy);
 }
 
 void type_field_tests()
@@ -1190,7 +1961,7 @@ void type_field_tests()
                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_put(returned_type);
 
        string_type = bt_ctf_field_type_string_create();
        ok(string_type, "Create a string type");
@@ -1232,10 +2003,11 @@ void type_field_tests()
                &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,
@@ -1247,7 +2019,7 @@ 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");
@@ -1257,7 +2029,7 @@ void type_field_tests()
                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,
@@ -1277,7 +2049,7 @@ void type_field_tests()
                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");
@@ -1342,21 +2114,21 @@ void type_field_tests()
        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(enumeration);
+       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(enumeration_sequence_type);
+       bt_put(enumeration_array_type);
+       bt_put(returned_type);
 }
 
 void packet_resize_test(struct bt_ctf_stream_class *stream_class,
@@ -1398,14 +2170,14 @@ void packet_resize_test(struct bt_ctf_stream_class *stream_class,
        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);
+       bt_put(ret_field_type);
+       bt_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);
+       bt_put(event);
 
        ok(bt_ctf_stream_get_event_context(NULL) == NULL,
                "bt_ctf_stream_get_event_context handles NULL correctly");
@@ -1421,7 +2193,7 @@ void packet_resize_test(struct bt_ctf_stream_class *stream_class,
        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);
+       bt_put(ret_field);
 
        for (i = 0; i < PACKET_RESIZE_TEST_LENGTH; i++) {
                event = bt_ctf_event_create(event_class);
@@ -1434,21 +2206,21 @@ void packet_resize_test(struct bt_ctf_stream_class *stream_class,
                ret |= bt_ctf_field_unsigned_integer_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,
                        "common_event_context");
                ret |= bt_ctf_field_unsigned_integer_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;
@@ -1485,18 +2257,18 @@ end:
        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(event_context);
+       bt_put(event_class);
 }
 
 void test_empty_stream(struct bt_ctf_writer *writer)
 {
        int ret = 0;
-       struct bt_ctf_trace *trace = NULL;
+       struct bt_ctf_trace *trace = NULL, *ret_trace = NULL;
        struct bt_ctf_stream_class *stream_class = NULL;
        struct bt_ctf_stream *stream = NULL;
 
@@ -1514,18 +2286,233 @@ 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");
+       ok(bt_ctf_stream_class_get_trace(stream_class) == NULL,
+               "bt_ctf_stream_class_get_trace returns NULL when stream class is orphaned");
+
        stream = bt_ctf_writer_create_stream(writer, stream_class);
        if (!stream) {
                diag("Failed to create writer stream");
                ret = -1;
                goto end;
        }
+
+       ret_trace = bt_ctf_stream_class_get_trace(stream_class);
+       ok(ret_trace == trace,
+               "bt_ctf_stream_class_get_trace returns the correct trace after a stream has been created");
 end:
        ok(ret == 0,
                "Created a stream class with default attributes and an empty stream");
-       bt_ctf_trace_put(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_custom_event_header_stream(struct bt_ctf_writer *writer)
+{
+       int i, ret;
+       struct bt_ctf_trace *trace = NULL;
+       struct bt_ctf_clock *clock = NULL;
+       struct bt_ctf_stream_class *stream_class = 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;
+
+       trace = bt_ctf_writer_get_trace(writer);
+       if (!trace) {
+               fail("Failed to get trace from writer");
+               goto end;
+       }
+
+       clock = bt_ctf_trace_get_clock(trace, 0);
+       if (!clock) {
+               fail("Failed to get clock from trace");
+               goto end;
+       }
+
+       stream_class = bt_ctf_stream_class_create("custom_event_header_stream");
+       if (!stream_class) {
+               fail("Failed to create stream class");
+               goto end;
+       }
+
+       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(packet_header,
+               "custom_trace_packet_header_field");
+       if (!integer) {
+               fail("Failed to retrieve custom_trace_packet_header_field");
+               goto end;
+       }
+
+       ret = bt_ctf_field_unsigned_integer_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(event_header,
+               "seq_len");
+       if (!integer) {
+               fail("Failed to get seq_len field from event header");
+               goto end;
+       }
+
+       ret = bt_ctf_field_unsigned_integer_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_unsigned_integer_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(clock);
+       bt_put(trace);
+       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);
 }
 
 void test_instanciate_event_before_stream(struct bt_ctf_writer *writer)
@@ -1534,7 +2521,8 @@ void test_instanciate_event_before_stream(struct bt_ctf_writer *writer)
        struct bt_ctf_trace *trace = NULL;
        struct bt_ctf_clock *clock = NULL;
        struct bt_ctf_stream_class *stream_class = NULL;
-       struct bt_ctf_stream *stream = 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;
@@ -1615,22 +2603,50 @@ 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");
                goto end;
        }
+
+       ret_stream = bt_ctf_event_get_stream(event);
+       ok(ret_stream == stream,
+               "bt_ctf_event_get_stream returns an event's stream after it has been appended");
 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_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(trace);
+       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(clock);
+}
+
+void append_existing_event_class(struct bt_ctf_stream_class *stream_class)
+{
+       struct bt_ctf_event_class *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),
+               "two event classes with the same name cannot 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));
+       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_put(event_class);
 }
 
 int main(int argc, char **argv)
@@ -1642,8 +2658,11 @@ int main(int argc, char **argv)
        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 = 1351530929945824323;
+       const int64_t offset = 1234567;
+       int64_t get_offset_s,
+               get_offset,
+               get_time;
        const uint64_t precision = 10;
        const int is_absolute = 0xFF;
        char *metadata_string;
@@ -1668,15 +2687,16 @@ int main(int argc, char **argv)
        struct bt_ctf_trace *trace;
        int ret;
        int64_t ret_int64_t;
+       struct bt_value *obj;
 
        if (argc < 3) {
                printf("Usage: tests-ctf-writer path_to_ctf_parser_test path_to_babeltrace\n");
                return -1;
        }
 
-       plan_no_plan();
+       plan_tests(NR_TESTS);
 
-       if (!mkdtemp(trace_path)) {
+       if (!bt_mkdtemp(trace_path)) {
                perror("# perror");
        }
 
@@ -1713,66 +2733,126 @@ int main(int argc, char **argv)
        ok(bt_ctf_writer_add_environment_field(writer, "test_field",
                NULL),
                "bt_ctf_writer_add_environment_field error with NULL field value");
-       ok(bt_ctf_trace_add_environment_field_integer(NULL, "test_env", 0),
-               "bt_ctf_trace_add_environment_field_integer handles a NULL trace correctly");
-       ok(bt_ctf_trace_add_environment_field_integer(trace, NULL, 0),
-               "bt_ctf_trace_add_environment_field_integer handles a NULL environment field name");
-       ok(!bt_ctf_trace_add_environment_field_integer(trace, "test_env",
-               123456),
-               "Add an integer environment field to a trace instance");
+
+       /* Test bt_ctf_trace_set_environment_field with an integer object */
+       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");
+       ok(bt_ctf_trace_set_environment_field(trace, NULL, obj),
+               "bt_ctf_trace_set_environment_field handles a NULL name correctly");
+       ok(bt_ctf_trace_set_environment_field(trace, "test_env_int_obj", NULL),
+               "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_PUT(obj);
+
+       /* Test bt_ctf_trace_set_environment_field with a string object */
+       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_PUT(obj);
+
+       /* Test bt_ctf_trace_set_environment_field_integer */
+       ok(bt_ctf_trace_set_environment_field_integer(NULL, "test_env_int",
+               -194875),
+               "bt_ctf_trace_set_environment_field_integer handles a NULL trace correctly");
+       ok(bt_ctf_trace_set_environment_field_integer(trace, NULL, -194875),
+               "bt_ctf_trace_set_environment_field_integer handles a NULL name correctly");
+       ok(!bt_ctf_trace_set_environment_field_integer(trace, "test_env_int",
+               -164973),
+               "bt_ctf_trace_set_environment_field_integer succeeds");
+
+       /* Test bt_ctf_trace_set_environment_field_string */
+       ok(bt_ctf_trace_set_environment_field_string(NULL, "test_env_str",
+               "yeah"),
+               "bt_ctf_trace_set_environment_field_string handles a NULL trace correctly");
+       ok(bt_ctf_trace_set_environment_field_string(trace, NULL, "yeah"),
+               "bt_ctf_trace_set_environment_field_string handles a NULL name correctly");
+       ok(bt_ctf_trace_set_environment_field_string(trace, "test_env_str",
+               NULL),
+               "bt_ctf_trace_set_environment_field_string handles a NULL value correctly");
+       ok(!bt_ctf_trace_set_environment_field_string(trace, "test_env_str",
+               "oh yeah"),
+               "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) == 2,
+       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_type */
-       ok(bt_ctf_trace_get_environment_field_type(trace, 2) ==
-               BT_ENVIRONMENT_FIELD_TYPE_UNKNOWN,
-               "bt_ctf_trace_get_environment_field_type handles an invalid index correctly");
-       ok(bt_ctf_trace_get_environment_field_type(NULL, 0) ==
-               BT_ENVIRONMENT_FIELD_TYPE_UNKNOWN,
-               "bt_ctf_trace_get_environment_field_type handles a NULL trace correctly");
-       ok(bt_ctf_trace_get_environment_field_type(trace, 1) ==
-               BT_ENVIRONMENT_FIELD_TYPE_INTEGER,
-               "bt_ctf_trace_get_environment_field_type the correct type of environment field");
-
        /* 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");
+               "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);
        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);
+       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);
+       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);
+       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);
+       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_string */
-       ok(bt_ctf_trace_get_environment_field_value_string(NULL, 0) == NULL,
-               "bt_ctf_trace_get_environment_field_value_string handles a NULL trace correctly");
-       ok(bt_ctf_trace_get_environment_field_value_string(trace, -1) == NULL,
-               "bt_ctf_trace_get_environment_field_value_string handles an invalid index correctly");
-       ok(bt_ctf_trace_get_environment_field_value_string(trace, 1) == NULL,
-               "bt_ctf_trace_get_environment_field_value_string validates environment field type");
-       ret_string = bt_ctf_trace_get_environment_field_value_string(trace, 0);
-       ok(ret_string && !strcmp(ret_string, hostname),
-               "bt_ctf_trace_get_environment_field_value_string returns a correct value");
-
-       /* Test bt_ctf_trace_get_environment_field_value_integer */
-       ok(bt_ctf_trace_get_environment_field_value_integer(NULL, 0, &ret_int64_t) < 0,
-               "bt_ctf_trace_get_environment_field_value_integer handles a NULL trace correctly");
-       ok(bt_ctf_trace_get_environment_field_value_integer(trace, 42, &ret_int64_t) < 0,
-               "bt_ctf_trace_get_environment_field_value_integer handles an invalid index correctly");
-       ok(bt_ctf_trace_get_environment_field_value_integer(trace, 1, NULL) < 0,
-               "bt_ctf_trace_get_environment_field_value_integer handles a NULL value argument correctly");
-       ok(bt_ctf_trace_get_environment_field_value_integer(trace, 0, &ret_int64_t) < 0,
-               "bt_ctf_trace_get_environment_field_value_integer validates environment field type");
-       ok(!bt_ctf_trace_get_environment_field_value_integer(trace, 1, &ret_int64_t),
-               "bt_ctf_trace_get_environment_field_value_integer returns a value");
-       ok(ret_int64_t == 123456,
-               "bt_ctf_trace_get_environment_field_value_integer returned a correct value");
-
-       if (uname(&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_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_PUT(obj);
+       obj = bt_ctf_trace_get_environment_field_value(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_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_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_PUT(obj);
+
+       /* Test environment field replacement */
+       ok(!bt_ctf_trace_set_environment_field_integer(trace, "test_env_int",
+               654321),
+               "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_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_PUT(obj);
+
+       /* On Solaris, uname() can return any positive value on success */
+       if (uname(&name) < 0) {
                perror("uname");
                return -1;
        }
@@ -1824,18 +2904,26 @@ 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");
@@ -1851,11 +2939,15 @@ int main(int argc, char **argv)
        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,
+       ok(bt_ctf_clock_get_time(clock, &get_time) == 0,
+               "bt_ctf_clock_get_time succeeds");
+       ok(get_time == 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,
+       ok(bt_ctf_clock_get_time(clock, &get_time) == 0,
+               "bt_ctf_clock_get_time succeeds");
+       ok(get_time == current_time,
                "bt_ctf_clock_get_time returns the correct time once it is set");
 
        ok(bt_ctf_writer_add_clock(writer, clock) == 0,
@@ -1876,7 +2968,7 @@ int main(int argc, char **argv)
        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);
+       bt_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),
@@ -1886,7 +2978,7 @@ int main(int argc, char **argv)
        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);
+       bt_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");
 
@@ -1898,14 +2990,20 @@ int main(int argc, char **argv)
                "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_offset_s(NULL, &get_offset_s) < 0,
+               "bt_ctf_clock_get_offset_s correctly handles NULL clock");
+       ok(bt_ctf_clock_get_offset_s(clock, NULL) < 0,
+               "bt_ctf_clock_get_offset_s correctly handles NULL output");
+       ok(bt_ctf_clock_get_offset(NULL, &get_offset) < 0,
+               "bt_ctf_clock_get_offset correctly handles NULL clock");
+       ok(bt_ctf_clock_get_offset(clock, NULL) < 0,
+               "bt_ctf_clock_get_offset correctly handles NULL output");
        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_get_time(NULL, &get_time) < 0,
+               "bt_ctf_clock_get_time correctly handles NULL clock");
+       ok(bt_ctf_clock_get_time(clock, NULL) < 0,
+               "bt_ctf_clock_get_time correctly handles NULL output");
 
        ok(bt_ctf_clock_set_description(NULL, NULL) < 0,
                "bt_ctf_clock_set_description correctly handles NULL clock");
@@ -1964,11 +3062,14 @@ 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();
 
+       /* Test fields copying */
+       field_copy_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,
@@ -1997,7 +3098,7 @@ int main(int argc, char **argv)
        ok(bt_ctf_field_type_get_type_id(
                event_header_field_type) == CTF_TYPE_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");
@@ -2006,8 +3107,8 @@ int main(int argc, char **argv)
        ok(bt_ctf_field_type_get_type_id(
                event_header_field_type) == CTF_TYPE_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,
@@ -2020,15 +3121,15 @@ int main(int argc, char **argv)
        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,
@@ -2095,7 +3196,7 @@ int main(int argc, char **argv)
                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 */
        stream1 = bt_ctf_writer_create_stream(writer, stream_class);
@@ -2149,7 +3250,7 @@ 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);
+       bt_put(ret_field_type);
        packet_header_field = bt_ctf_field_structure_get_field(packet_header,
                "custom_trace_packet_header_field");
        ok(packet_header_field,
@@ -2168,6 +3269,9 @@ int main(int argc, char **argv)
        ok(!bt_ctf_stream_set_packet_header(stream1, packet_header),
                "Successfully set a stream's packet header");
 
+       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);
 
        append_simple_event(stream_class, stream1, clock);
@@ -2176,8 +3280,12 @@ int main(int argc, char **argv)
 
        append_complex_event(stream_class, stream1, clock);
 
+       append_existing_event_class(stream_class);
+
        test_empty_stream(writer);
 
+       test_custom_event_header_stream(writer);
+
        metadata_string = bt_ctf_writer_get_metadata_string(writer);
        ok(metadata_string, "Get metadata string");
 
@@ -2185,22 +3293,22 @@ int main(int argc, char **argv)
        validate_metadata(argv[1], metadata_path);
        validate_trace(argv[2], trace_path);
 
-       bt_ctf_clock_put(clock);
-       bt_ctf_stream_class_put(stream_class);
-       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);
+       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);
@@ -2211,8 +3319,20 @@ int main(int argc, char **argv)
 
        struct dirent *entry;
        while ((entry = readdir(trace_dir))) {
-               if (entry->d_type == DT_REG) {
-                       unlinkat(dirfd(trace_dir), entry->d_name, 0);
+               struct stat st;
+               char filename[PATH_MAX];
+
+               if (snprintf(filename, sizeof(filename), "%s/%s",
+                                       trace_path, entry->d_name) <= 0) {
+                       continue;
+               }
+
+               if (stat(entry->d_name, &st)) {
+                       continue;
+               }
+
+               if (S_ISREG(st.st_mode)) {
+                       unlinkat(bt_dirfd(trace_dir), entry->d_name, 0);
                }
        }
 
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