values_equivalent_unittest.cc 3.0 KB

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  1. // Copyright 2022 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4. #include "base/memory/values_equivalent.h"
  5. #include "base/memory/raw_ptr.h"
  6. #include "base/memory/ref_counted.h"
  7. #include "base/memory/scoped_refptr.h"
  8. #include "testing/gtest/include/gtest/gtest.h"
  9. namespace base {
  10. TEST(ValuesEquivalentTest, Comparisons) {
  11. int a = 1234;
  12. int b1 = 5678;
  13. int b2 = 5678;
  14. EXPECT_TRUE(ValuesEquivalent<int>(nullptr, nullptr));
  15. EXPECT_FALSE(ValuesEquivalent<int>(&a, nullptr));
  16. EXPECT_FALSE(ValuesEquivalent<int>(nullptr, &a));
  17. EXPECT_FALSE(ValuesEquivalent(&a, &b1));
  18. EXPECT_TRUE(ValuesEquivalent(&a, &a));
  19. EXPECT_TRUE(ValuesEquivalent(&b1, &b2));
  20. }
  21. TEST(ValuesEquivalentTest, UniquePtr) {
  22. auto a = std::make_unique<int>(1234);
  23. auto b1 = std::make_unique<int>(5678);
  24. auto b2 = std::make_unique<int>(5678);
  25. EXPECT_TRUE(ValuesEquivalent(std::unique_ptr<int>(), std::unique_ptr<int>()));
  26. EXPECT_FALSE(ValuesEquivalent(a, std::unique_ptr<int>()));
  27. EXPECT_FALSE(ValuesEquivalent(std::unique_ptr<int>(), a));
  28. EXPECT_FALSE(ValuesEquivalent(a, b1));
  29. EXPECT_TRUE(ValuesEquivalent(a, a));
  30. EXPECT_TRUE(ValuesEquivalent(b1, b2));
  31. }
  32. TEST(ValuesEquivalentTest, ScopedRefPtr) {
  33. struct Wrapper : public RefCounted<Wrapper> {
  34. explicit Wrapper(int value) : value(value) {}
  35. int value;
  36. bool operator==(const Wrapper& other) const { return value == other.value; }
  37. protected:
  38. friend class RefCounted<Wrapper>;
  39. virtual ~Wrapper() = default;
  40. };
  41. auto a = MakeRefCounted<Wrapper>(1234);
  42. auto b1 = MakeRefCounted<Wrapper>(5678);
  43. auto b2 = MakeRefCounted<Wrapper>(5678);
  44. EXPECT_TRUE(
  45. ValuesEquivalent(scoped_refptr<Wrapper>(), scoped_refptr<Wrapper>()));
  46. EXPECT_FALSE(ValuesEquivalent(a, scoped_refptr<Wrapper>()));
  47. EXPECT_FALSE(ValuesEquivalent(scoped_refptr<Wrapper>(), a));
  48. EXPECT_FALSE(ValuesEquivalent(a, b1));
  49. EXPECT_TRUE(ValuesEquivalent(a, a));
  50. EXPECT_TRUE(ValuesEquivalent(b1, b2));
  51. }
  52. TEST(ValuesEquivalentTest, CapitalGetPtr) {
  53. class IntPointer {
  54. public:
  55. explicit IntPointer(int* pointer) : pointer_(pointer) {}
  56. const int* Get() const { return pointer_; }
  57. private:
  58. raw_ptr<int> pointer_ = nullptr;
  59. };
  60. auto a = 1234;
  61. auto b1 = 5678;
  62. auto b2 = 5678;
  63. EXPECT_TRUE(ValuesEquivalent(IntPointer(nullptr), IntPointer(nullptr)));
  64. EXPECT_FALSE(ValuesEquivalent(IntPointer(&a), IntPointer(nullptr)));
  65. EXPECT_FALSE(ValuesEquivalent(IntPointer(nullptr), IntPointer(&a)));
  66. EXPECT_FALSE(ValuesEquivalent(IntPointer(&a), IntPointer(&b1)));
  67. EXPECT_TRUE(ValuesEquivalent(IntPointer(&a), IntPointer(&a)));
  68. EXPECT_TRUE(ValuesEquivalent(IntPointer(&b1), IntPointer(&b2)));
  69. }
  70. TEST(ValuesEquivalentTest, BypassEqualsOperator) {
  71. struct NeverEqual {
  72. bool operator==(const NeverEqual& other) const { return false; }
  73. } a, b;
  74. ASSERT_FALSE(a == a);
  75. ASSERT_FALSE(a == b);
  76. EXPECT_TRUE(ValuesEquivalent(&a, &a));
  77. EXPECT_FALSE(ValuesEquivalent(&a, &b));
  78. }
  79. } // namespace base