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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// TODO(akalin): Change all users of this class to use SimpleTestClock
// or SimpleTestTickClock and remove this class.
// A helper class used to mock out calls to the static method base::Time::Now.
//
// Example usage:
//
// typedef base::Time(TimeProvider)();
// class StopWatch {
// public:
// StopWatch(TimeProvider* time_provider);
// void Start();
// base::TimeDelta Stop();
// private:
// TimeProvider* time_provider_;
// ...
// }
//
// Normally, you would instantiate a StopWatch with the real Now function:
//
// StopWatch watch(&base::Time::Now);
//
// But when testing, you want to instantiate it with
// MockTimeProvider::StaticNow, which calls an internally mocked out member.
// This allows you to set expectations on the Now method. For example:
//
// TEST_F(StopWatchTest, BasicTest) {
// InSequence s;
// StrictMock<MockTimeProvider> mock_time;
// EXPECT_CALL(mock_time, Now())
// .WillOnce(Return(Time::FromDoubleT(4)));
// EXPECT_CALL(mock_time, Now())
// .WillOnce(Return(Time::FromDoubleT(10)));
//
// StopWatch sw(&MockTimeProvider::StaticNow);
// sw.Start(); // First call to Now.
// TimeDelta elapsed = sw.stop(); // Second call to Now.
// ASSERT_EQ(elapsed, TimeDelta::FromSeconds(6));
// }
#ifndef BASE_TEST_MOCK_TIME_PROVIDER_H_
#define BASE_TEST_MOCK_TIME_PROVIDER_H_
#include "base/time/time.h"
#include "testing/gmock/include/gmock/gmock.h"
namespace base {
class MockTimeProvider {
public:
MockTimeProvider();
~MockTimeProvider();
MOCK_METHOD0(Now, Time());
static Time StaticNow();
private:
static MockTimeProvider* instance_;
DISALLOW_COPY_AND_ASSIGN(MockTimeProvider);
};
} // namespace base
#endif // BASE_TEST_MOCK_TIME_PROVIDER_H_
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