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136 lines
3.9 KiB
136 lines
3.9 KiB
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// This test is a simple sanity check to make sure gmock is able to build/link
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// correctly. It just instantiates a mock object and runs through a couple of
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// the basic mock features.
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#include "testing/gmock/include/gmock/gmock.h"
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#include "testing/gtest/include/gtest/gtest.h"
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// Gmock matchers and actions that we use below.
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using testing::AnyOf;
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using testing::Eq;
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using testing::Return;
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using testing::SetArgPointee;
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using testing::WithArg;
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using testing::_;
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namespace {
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// Simple class that we can mock out the behavior for. Everything is virtual
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// for easy mocking.
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class SampleClass {
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public:
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SampleClass() = default;
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virtual ~SampleClass() = default;
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virtual int ReturnSomething() {
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return -1;
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}
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virtual void ReturnNothingConstly() const {
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}
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virtual void OutputParam(int* a) {
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}
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virtual int ReturnSecond(int a, int b) {
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return b;
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}
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};
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// Declare a mock for the class.
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class MockSampleClass : public SampleClass {
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public:
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MOCK_METHOD0(ReturnSomething, int());
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MOCK_CONST_METHOD0(ReturnNothingConstly, void());
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MOCK_METHOD1(OutputParam, void(int* a));
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MOCK_METHOD2(ReturnSecond, int(int a, int b));
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};
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// Create a couple of custom actions. Custom actions can be used for adding
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// more complex behavior into your mock...though if you start needing these, ask
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// if you're asking your mock to do too much.
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ACTION(ReturnVal) {
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// Return the first argument received.
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return arg0;
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}
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ACTION(ReturnSecond) {
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// Returns the second argument. This basically implemetns ReturnSecond.
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return arg1;
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}
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TEST(GmockTest, SimpleMatchAndActions) {
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// Basic test of some simple gmock matchers, actions, and cardinality
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// expectations.
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MockSampleClass mock;
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EXPECT_CALL(mock, ReturnSomething())
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.WillOnce(Return(1))
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.WillOnce(Return(2))
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.WillOnce(Return(3));
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EXPECT_EQ(1, mock.ReturnSomething());
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EXPECT_EQ(2, mock.ReturnSomething());
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EXPECT_EQ(3, mock.ReturnSomething());
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EXPECT_CALL(mock, ReturnNothingConstly()).Times(2);
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mock.ReturnNothingConstly();
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mock.ReturnNothingConstly();
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}
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TEST(GmockTest, AssignArgument) {
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// Capture an argument for examination.
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MockSampleClass mock;
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EXPECT_CALL(mock, OutputParam(_)).WillRepeatedly(SetArgPointee<0>(5));
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int arg = 0;
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mock.OutputParam(&arg);
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EXPECT_EQ(5, arg);
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}
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TEST(GmockTest, SideEffects) {
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// Capture an argument for examination.
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MockSampleClass mock;
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EXPECT_CALL(mock, OutputParam(_)).WillRepeatedly(SetArgPointee<0>(5));
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int arg = 0;
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mock.OutputParam(&arg);
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EXPECT_EQ(5, arg);
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}
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TEST(GmockTest, CustomAction_ReturnSecond) {
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// Test a mock of the ReturnSecond behavior using an action that provides an
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// alternate implementation of the function. Danger here though, this is
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// starting to add too much behavior of the mock, which means the mock
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// implementation might start to have bugs itself.
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MockSampleClass mock;
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EXPECT_CALL(mock, ReturnSecond(_, AnyOf(Eq(4), Eq(5))))
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.WillRepeatedly(ReturnSecond());
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EXPECT_EQ(4, mock.ReturnSecond(-1, 4));
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EXPECT_EQ(5, mock.ReturnSecond(0, 5));
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EXPECT_EQ(4, mock.ReturnSecond(0xdeadbeef, 4));
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EXPECT_EQ(4, mock.ReturnSecond(112358, 4));
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EXPECT_EQ(5, mock.ReturnSecond(1337, 5));
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}
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TEST(GmockTest, CustomAction_ReturnVal) {
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// Alternate implemention of ReturnSecond using a more general custom action,
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// and a WithArg adapter to bridge the interfaces.
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MockSampleClass mock;
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EXPECT_CALL(mock, ReturnSecond(_, AnyOf(Eq(4), Eq(5))))
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.WillRepeatedly(WithArg<1>(ReturnVal()));
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EXPECT_EQ(4, mock.ReturnSecond(-1, 4));
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EXPECT_EQ(5, mock.ReturnSecond(0, 5));
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EXPECT_EQ(4, mock.ReturnSecond(0xdeadbeef, 4));
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EXPECT_EQ(4, mock.ReturnSecond(112358, 4));
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EXPECT_EQ(5, mock.ReturnSecond(1337, 5));
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}
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} // namespace
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