enum_variant_unittest.cc 3.9 KB

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  1. // Copyright (c) 2011 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/win/enum_variant.h"
  5. #include <wrl/client.h>
  6. #include <wrl/implements.h>
  7. #include "base/win/scoped_com_initializer.h"
  8. #include "base/win/scoped_variant.h"
  9. #include "testing/gtest/include/gtest/gtest.h"
  10. namespace base {
  11. namespace win {
  12. TEST(EnumVariantTest, EmptyEnumVariant) {
  13. ScopedCOMInitializer com_initializer;
  14. Microsoft::WRL::ComPtr<EnumVariant> ev = Microsoft::WRL::Make<EnumVariant>(0);
  15. Microsoft::WRL::ComPtr<IEnumVARIANT> ienumvariant;
  16. ASSERT_TRUE(SUCCEEDED(ev->QueryInterface(IID_PPV_ARGS(&ienumvariant))));
  17. {
  18. base::win::ScopedVariant out_element;
  19. ULONG out_received = 0;
  20. EXPECT_EQ(S_FALSE, ev->Next(1, out_element.Receive(), &out_received));
  21. EXPECT_EQ(0u, out_received);
  22. }
  23. EXPECT_EQ(S_FALSE, ev->Skip(1));
  24. EXPECT_EQ(S_OK, ev->Reset());
  25. Microsoft::WRL::ComPtr<IEnumVARIANT> ev2;
  26. EXPECT_EQ(S_OK, ev->Clone(&ev2));
  27. EXPECT_NE(nullptr, ev2);
  28. EXPECT_NE(ev, ev2);
  29. EXPECT_EQ(S_FALSE, ev2->Skip(1));
  30. EXPECT_EQ(S_OK, ev2->Reset());
  31. }
  32. TEST(EnumVariantTest, SimpleEnumVariant) {
  33. ScopedCOMInitializer com_initializer;
  34. Microsoft::WRL::ComPtr<EnumVariant> ev = Microsoft::WRL::Make<EnumVariant>(3);
  35. ev->ItemAt(0)->vt = VT_I4;
  36. ev->ItemAt(0)->lVal = 10;
  37. ev->ItemAt(1)->vt = VT_I4;
  38. ev->ItemAt(1)->lVal = 20;
  39. ev->ItemAt(2)->vt = VT_I4;
  40. ev->ItemAt(2)->lVal = 30;
  41. // Get elements one at a time from index 0 and 2.
  42. base::win::ScopedVariant out_element_0;
  43. ULONG out_received_0 = 0;
  44. EXPECT_EQ(S_OK, ev->Next(1, out_element_0.Receive(), &out_received_0));
  45. EXPECT_EQ(1u, out_received_0);
  46. EXPECT_EQ(VT_I4, out_element_0.ptr()->vt);
  47. EXPECT_EQ(10, out_element_0.ptr()->lVal);
  48. EXPECT_EQ(S_OK, ev->Skip(1));
  49. base::win::ScopedVariant out_element_2;
  50. ULONG out_received_2 = 0;
  51. EXPECT_EQ(S_OK, ev->Next(1, out_element_2.Receive(), &out_received_2));
  52. EXPECT_EQ(1u, out_received_2);
  53. EXPECT_EQ(VT_I4, out_element_2.ptr()->vt);
  54. EXPECT_EQ(30, out_element_2.ptr()->lVal);
  55. base::win::ScopedVariant placeholder_variant;
  56. EXPECT_EQ(S_FALSE, ev->Next(1, placeholder_variant.Receive(), nullptr));
  57. // Verify the reset works for the next step.
  58. ASSERT_EQ(S_OK, ev->Reset());
  59. // Get all elements at once.
  60. VARIANT out_elements[3];
  61. ULONG out_received_multiple;
  62. for (int i = 0; i < 3; ++i)
  63. ::VariantInit(&out_elements[i]);
  64. EXPECT_EQ(S_OK, ev->Next(3, out_elements, &out_received_multiple));
  65. EXPECT_EQ(3u, out_received_multiple);
  66. EXPECT_EQ(VT_I4, out_elements[0].vt);
  67. EXPECT_EQ(10, out_elements[0].lVal);
  68. EXPECT_EQ(VT_I4, out_elements[1].vt);
  69. EXPECT_EQ(20, out_elements[1].lVal);
  70. EXPECT_EQ(VT_I4, out_elements[2].vt);
  71. EXPECT_EQ(30, out_elements[2].lVal);
  72. for (int i = 0; i < 3; ++i)
  73. ::VariantClear(&out_elements[i]);
  74. base::win::ScopedVariant placeholder_variant_multiple;
  75. EXPECT_EQ(S_FALSE,
  76. ev->Next(1, placeholder_variant_multiple.Receive(), nullptr));
  77. }
  78. TEST(EnumVariantTest, Clone) {
  79. ScopedCOMInitializer com_initializer;
  80. Microsoft::WRL::ComPtr<EnumVariant> ev = Microsoft::WRL::Make<EnumVariant>(3);
  81. ev->ItemAt(0)->vt = VT_I4;
  82. ev->ItemAt(0)->lVal = 10;
  83. ev->ItemAt(1)->vt = VT_I4;
  84. ev->ItemAt(1)->lVal = 20;
  85. ev->ItemAt(2)->vt = VT_I4;
  86. ev->ItemAt(2)->lVal = 30;
  87. // Clone it.
  88. Microsoft::WRL::ComPtr<IEnumVARIANT> ev2;
  89. EXPECT_EQ(S_OK, ev->Clone(&ev2));
  90. EXPECT_TRUE(ev2 != nullptr);
  91. VARIANT out_elements[3];
  92. for (int i = 0; i < 3; ++i)
  93. ::VariantInit(&out_elements[i]);
  94. EXPECT_EQ(S_OK, ev2->Next(3, out_elements, nullptr));
  95. EXPECT_EQ(VT_I4, out_elements[0].vt);
  96. EXPECT_EQ(10, out_elements[0].lVal);
  97. EXPECT_EQ(VT_I4, out_elements[1].vt);
  98. EXPECT_EQ(20, out_elements[1].lVal);
  99. EXPECT_EQ(VT_I4, out_elements[2].vt);
  100. EXPECT_EQ(30, out_elements[2].lVal);
  101. for (int i = 0; i < 3; ++i)
  102. ::VariantClear(&out_elements[i]);
  103. }
  104. } // namespace win
  105. } // namespace base