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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 "third_party/blink/renderer/platform/histogram.h"
#include "base/metrics/histogram_samples.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/testing/wtf/scoped_mock_clock.h"
#include "third_party/blink/renderer/platform/wtf/time.h"
namespace blink {
class TestCustomCountHistogram : public CustomCountHistogram {
public:
TestCustomCountHistogram(const char* name,
base::HistogramBase::Sample min,
base::HistogramBase::Sample max,
int32_t bucket_count)
: CustomCountHistogram(name, min, max, bucket_count) {}
base::HistogramBase* Histogram() { return histogram_; }
};
TEST(ScopedUsHistogramTimerTest, Basic) {
TestCustomCountHistogram scoped_us_counter("ScopedUsHistogramTimerTest.Basic",
0, 10000000, 50);
{
WTF::ScopedMockClock clock;
ScopedUsHistogramTimer timer(scoped_us_counter);
clock.Advance(TimeDelta::FromMilliseconds(500));
}
// 500ms == 500000us
EXPECT_EQ(500000, scoped_us_counter.Histogram()->SnapshotSamples()->sum());
}
TEST(ScopedHighResUsHistogramTimerTest, Basic) {
TestCustomCountHistogram scoped_us_counter(
"ScopedHighResUsHistogramTimerTest.Basic", 0, 10000000, 50);
{
WTF::ScopedMockClock clock;
ScopedHighResUsHistogramTimer timer(scoped_us_counter);
clock.Advance(TimeDelta::FromMilliseconds(500));
}
int64_t expected = TimeTicks::IsHighResolution() ? 500000 : 0;
EXPECT_EQ(expected, scoped_us_counter.Histogram()->SnapshotSamples()->sum());
}
} // namespace blink
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