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// Copyright 2016 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.
#include "platform/Histogram.h"
#include "base/metrics/histogram_samples.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
class ScopedUsHistogramTimerTest : public ::testing::Test {
public:
static void advanceClock(double microseconds) {
s_timeElapsed += microseconds;
}
protected:
static double returnMockTime() { return s_timeElapsed; }
virtual void SetUp() {
s_timeElapsed = 0.0;
m_originalTimeFunction = setTimeFunctionsForTesting(returnMockTime);
}
virtual void TearDown() {
setTimeFunctionsForTesting(m_originalTimeFunction);
}
private:
static double s_timeElapsed;
TimeFunction m_originalTimeFunction;
};
double ScopedUsHistogramTimerTest::s_timeElapsed;
class TestCustomCountHistogram : public CustomCountHistogram {
public:
TestCustomCountHistogram(const char* name,
base::HistogramBase::Sample min,
base::HistogramBase::Sample max,
int32_t bucketCount)
: CustomCountHistogram(name, min, max, bucketCount) {}
base::HistogramBase* histogram() { return m_histogram; }
};
TEST_F(ScopedUsHistogramTimerTest, Basic) {
TestCustomCountHistogram scopedUsCounter("test", 0, 10000000, 50);
{
ScopedUsHistogramTimer timer(scopedUsCounter);
advanceClock(0.5);
}
// 0.5s == 500000us
EXPECT_EQ(500000, scopedUsCounter.histogram()->SnapshotSamples()->sum());
}
} // namespace blink
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