tests/cpp-common/test-c-string-view.cpp

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0-only
   3  *
   4  * Copyright (C) 2024 EfficiOS, Inc.
   5  */
   6
   7 #include <string>
   8
   9 #include "cpp-common/bt2c/c-string-view.hpp"
  10
  11 #include "tap/tap.h"
  12
  13 namespace {
  14
  15 template <typename StrT>
  16 const char *asConstCharPtr(StrT&& val)
  17 {
  18     return val.data();
  19 }
  20
  21 const char *asConstCharPtr(const char * const val)
  22 {
  23     return val;
  24 }
  25
  26 const char *typeName(bt2c::CStringView)
  27 {
  28     return "bt2c::CStringView";
  29 }
  30
  31 const char *typeName(const char *)
  32 {
  33     return "const char *";
  34 }
  35
  36 const char *typeName(const std::string&)
  37 {
  38     return "std::string";
  39 }
  40
  41 template <typename Str1T, typename Str2T>
  42 void testEq(Str1T&& lhs, Str2T&& rhs)
  43 {
  44     BT_ASSERT(asConstCharPtr(lhs) != asConstCharPtr(rhs));
  45     ok(lhs == rhs, "`%s` == `%s`", typeName(lhs), typeName(rhs));
  46 }
  47
  48 template <typename Str1T, typename Str2T>
  49 void testNe(Str1T&& lhs, Str2T&& rhs)
  50 {
  51     BT_ASSERT(asConstCharPtr(lhs) != asConstCharPtr(rhs));
  52     ok(lhs != rhs, "`%s` != `%s`", typeName(lhs), typeName(rhs));
  53 }
  54
  55 void testEquality()
  56 {
  57     const std::string foo1 = "foo", foo2 = "foo";
  58     const std::string bar = "bar";
  59
  60     /* `CStringView` vs `CStringView` */
  61     testEq(bt2c::CStringView {foo1}, bt2c::CStringView {foo2});
  62     testNe(bt2c::CStringView {foo1}, bt2c::CStringView {bar});
  63
  64     /* `CStringView` vs `const char *` */
  65     testEq(bt2c::CStringView {foo1}, foo2.c_str());
  66     testNe(bt2c::CStringView {foo1}, bar.c_str());
  67     testEq(foo1.c_str(), bt2c::CStringView {foo2});
  68     testNe(foo1.c_str(), bt2c::CStringView {bar});
  69
  70     /* `StringView` vs `std::string` */
  71     testEq(bt2c::CStringView {foo1}, foo2);
  72     testNe(bt2c::CStringView {foo1}, bar);
  73     testEq(foo1, bt2c::CStringView {foo2});
  74     testNe(foo1, bt2c::CStringView {bar});
  75 }
  76
  77 void testStartsWith()
  78 {
  79     ok(bt2c::CStringView {"Moutarde choux"}.startsWith("Moutarde"),
  80        "\"Moutarde Choux\" starts with \"Moutarde\"");
  81     ok(!bt2c::CStringView {"Moutarde choux"}.startsWith("Choux"),
  82        "\"Moutarde Choux\" does not start with \"Choux\"");
  83     ok(bt2c::CStringView {"Moutarde choux"}.startsWith(""), "\"Moutarde Choux\" starts with \"\"");
  84     ok(bt2c::CStringView {"Moutarde choux"}.startsWith("Moutarde choux"),
  85        "\"Moutarde Choux\" starts with \"Moutarde choux\"");
  86     ok(!bt2c::CStringView {"Moutarde"}.startsWith("Moutarde choux"),
  87        "\"Moutarde\" does not start with \"Moutarde choux\"");
  88     ok(bt2c::CStringView {""}.startsWith(""), "\"\" starts with \"\"");
  89 }
  90
  91 } /* namespace */
  92
  93 int main()
  94 {
  95     plan_tests(16);
  96     testEquality();
  97     testStartsWith();
  98     return exit_status();
  99 }