1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
// Copyright 2016 The Chromium Authors
// 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/instrumentation/histogram.h"
#include "base/metrics/histogram_samples.h"
#include "base/test/test_mock_time_task_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
class TestCustomCountHistogram : public CustomCountHistogram {
public:
TestCustomCountHistogram(const char* name,
base::HistogramBase::Sample32 min,
base::HistogramBase::Sample32 max,
int32_t bucket_count)
: CustomCountHistogram(name, min, max, bucket_count) {}
base::HistogramBase* Histogram() { return histogram_; }
};
class ScopedUsHistogramTimerTest : public testing::Test {
public:
void SetUp() override {
test_task_runner_ = base::MakeRefCounted<base::TestMockTimeTaskRunner>();
}
protected:
scoped_refptr<base::TestMockTimeTaskRunner> test_task_runner_;
};
TEST_F(ScopedUsHistogramTimerTest, Basic) {
TestCustomCountHistogram scoped_us_counter(
"ScopedUsHistogramTimerTest.Basic", kTimeBasedHistogramMinSample,
kTimeBasedHistogramMaxSample, kTimeBasedHistogramBucketCount);
{
ScopedUsHistogramTimer timer(scoped_us_counter,
test_task_runner_->GetMockTickClock());
test_task_runner_->FastForwardBy(base::Milliseconds(500));
}
// 500ms == 500000us
EXPECT_EQ(500000, scoped_us_counter.Histogram()->SnapshotSamples()->sum());
}
TEST_F(ScopedUsHistogramTimerTest, BasicHighRes) {
TestCustomCountHistogram scoped_us_counter(
"ScopedHighResUsHistogramTimerTest.Basic", kTimeBasedHistogramMinSample,
kTimeBasedHistogramMaxSample, kTimeBasedHistogramBucketCount);
{
ScopedHighResUsHistogramTimer timer(scoped_us_counter,
test_task_runner_->GetMockTickClock());
test_task_runner_->FastForwardBy(base::Milliseconds(500));
}
int64_t expected = base::TimeTicks::IsHighResolution() ? 500000 : 0;
EXPECT_EQ(expected, scoped_us_counter.Histogram()->SnapshotSamples()->sum());
}
} // namespace blink
|
