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| 1 // Copyright (c) 2009 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 // |
| 5 // This test is a simple sanity check to make sure gmock is able to build/link |
| 6 // correctly. It just instantiates a mock object and runs through a couple of |
| 7 // the basic mock features. |
| 8 |
| 9 #include "testing/gmock/include/gmock/gmock.h" |
| 10 #include "testing/gtest/include/gtest/gtest.h" |
| 11 |
| 12 // Gmock matchers and actions that we use below. |
| 13 using testing::AnyOf; |
| 14 using testing::Eq; |
| 15 using testing::Return; |
| 16 using testing::SetArgumentPointee; |
| 17 using testing::WithArg; |
| 18 using testing::_; |
| 19 |
| 20 namespace { |
| 21 |
| 22 // Simple class that we can mock out the behavior for. Everything is virtual |
| 23 // for easy mocking. |
| 24 class SampleClass { |
| 25 public: |
| 26 SampleClass() {} |
| 27 virtual ~SampleClass() {} |
| 28 |
| 29 virtual int ReturnSomething() { |
| 30 return -1; |
| 31 } |
| 32 |
| 33 virtual void ReturnNothingConstly() const { |
| 34 } |
| 35 |
| 36 virtual void OutputParam(int* a) { |
| 37 } |
| 38 |
| 39 virtual int ReturnSecond(int a, int b) { |
| 40 return b; |
| 41 } |
| 42 }; |
| 43 |
| 44 // Declare a mock for the class. |
| 45 class MockSampleClass : public SampleClass { |
| 46 public: |
| 47 MOCK_METHOD0(ReturnSomething, int()); |
| 48 MOCK_CONST_METHOD0(ReturnNothingConstly, void()); |
| 49 MOCK_METHOD1(OutputParam, void(int* a)); |
| 50 MOCK_METHOD2(ReturnSecond, int(int a, int b)); |
| 51 }; |
| 52 |
| 53 // Create a couple of custom actions. Custom actions can be used for adding |
| 54 // more complex behavior into your mock...though if you start needing these, ask |
| 55 // if you're asking your mock to do too much. |
| 56 ACTION(ReturnVal) { |
| 57 // Return the first argument received. |
| 58 return arg0; |
| 59 } |
| 60 ACTION(ReturnSecond) { |
| 61 // Returns the second argument. This basically implemetns ReturnSecond. |
| 62 return arg1; |
| 63 } |
| 64 |
| 65 TEST(GmockTest, SimpleMatchAndActions) { |
| 66 // Basic test of some simple gmock matchers, actions, and cardinality |
| 67 // expectations. |
| 68 MockSampleClass mock; |
| 69 |
| 70 EXPECT_CALL(mock, ReturnSomething()) |
| 71 .WillOnce(Return(1)) |
| 72 .WillOnce(Return(2)) |
| 73 .WillOnce(Return(3)); |
| 74 EXPECT_EQ(1, mock.ReturnSomething()); |
| 75 EXPECT_EQ(2, mock.ReturnSomething()); |
| 76 EXPECT_EQ(3, mock.ReturnSomething()); |
| 77 |
| 78 EXPECT_CALL(mock, ReturnNothingConstly()).Times(2); |
| 79 mock.ReturnNothingConstly(); |
| 80 mock.ReturnNothingConstly(); |
| 81 } |
| 82 |
| 83 TEST(GmockTest, AssignArgument) { |
| 84 // Capture an argument for examination. |
| 85 MockSampleClass mock; |
| 86 |
| 87 EXPECT_CALL(mock, OutputParam(_)) |
| 88 .WillRepeatedly(SetArgumentPointee<0>(5)); |
| 89 |
| 90 int arg = 0; |
| 91 mock.OutputParam(&arg); |
| 92 EXPECT_EQ(5, arg); |
| 93 } |
| 94 |
| 95 TEST(GmockTest, SideEffects) { |
| 96 // Capture an argument for examination. |
| 97 MockSampleClass mock; |
| 98 |
| 99 EXPECT_CALL(mock, OutputParam(_)) |
| 100 .WillRepeatedly(SetArgumentPointee<0>(5)); |
| 101 |
| 102 int arg = 0; |
| 103 mock.OutputParam(&arg); |
| 104 EXPECT_EQ(5, arg); |
| 105 } |
| 106 |
| 107 TEST(GmockTest, CustomAction_ReturnSecond) { |
| 108 // Test a mock of the ReturnSecond behavior using an action that provides an |
| 109 // alternate implementation of the function. Danger here though, this is |
| 110 // starting to add too much behavior of the mock, which means the mock |
| 111 // implementation might start to have bugs itself. |
| 112 MockSampleClass mock; |
| 113 |
| 114 EXPECT_CALL(mock, ReturnSecond(_, AnyOf(Eq(4), Eq(5)))) |
| 115 .WillRepeatedly(ReturnSecond()); |
| 116 EXPECT_EQ(4, mock.ReturnSecond(-1, 4)); |
| 117 EXPECT_EQ(5, mock.ReturnSecond(0, 5)); |
| 118 EXPECT_EQ(4, mock.ReturnSecond(0xdeadbeef, 4)); |
| 119 EXPECT_EQ(4, mock.ReturnSecond(112358, 4)); |
| 120 EXPECT_EQ(5, mock.ReturnSecond(1337, 5)); |
| 121 } |
| 122 |
| 123 TEST(GmockTest, CustomAction_ReturnVal) { |
| 124 // Alternate implemention of ReturnSecond using a more general custom action, |
| 125 // and a WithArg adapter to bridge the interfaces. |
| 126 MockSampleClass mock; |
| 127 |
| 128 EXPECT_CALL(mock, ReturnSecond(_, AnyOf(Eq(4), Eq(5)))) |
| 129 .WillRepeatedly(WithArg<1>(ReturnVal())); |
| 130 EXPECT_EQ(4, mock.ReturnSecond(-1, 4)); |
| 131 EXPECT_EQ(5, mock.ReturnSecond(0, 5)); |
| 132 EXPECT_EQ(4, mock.ReturnSecond(0xdeadbeef, 4)); |
| 133 EXPECT_EQ(4, mock.ReturnSecond(112358, 4)); |
| 134 EXPECT_EQ(5, mock.ReturnSecond(1337, 5)); |
| 135 } |
| 136 |
| 137 } // namespace |
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