97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
// Copyright 2017 The Chromium Authors
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "base/metrics/histogram_samples.h"
|
|
|
|
#include <limits>
|
|
|
|
#include "base/test/gtest_util.h"
|
|
#include "testing/gtest/include/gtest/gtest.h"
|
|
|
|
namespace base {
|
|
|
|
using SingleSample = HistogramSamples::SingleSample;
|
|
using AtomicSingleSample = HistogramSamples::AtomicSingleSample;
|
|
|
|
TEST(SingleSampleTest, Load) {
|
|
AtomicSingleSample sample;
|
|
ASSERT_TRUE(sample.Accumulate(9, 1));
|
|
|
|
SingleSample s = sample.Load();
|
|
EXPECT_EQ(9U, s.bucket);
|
|
EXPECT_EQ(1U, s.count);
|
|
|
|
s = sample.Load();
|
|
EXPECT_EQ(9U, s.bucket);
|
|
EXPECT_EQ(1U, s.count);
|
|
|
|
ASSERT_TRUE(sample.Accumulate(9, 1));
|
|
s = sample.Load();
|
|
EXPECT_EQ(9U, s.bucket);
|
|
EXPECT_EQ(2U, s.count);
|
|
}
|
|
|
|
TEST(SingleSampleTest, Extract) {
|
|
AtomicSingleSample sample;
|
|
ASSERT_TRUE(sample.Accumulate(9, 1));
|
|
|
|
SingleSample s = sample.Extract();
|
|
EXPECT_EQ(9U, s.bucket);
|
|
EXPECT_EQ(1U, s.count);
|
|
|
|
s = sample.Extract();
|
|
EXPECT_EQ(0U, s.bucket);
|
|
EXPECT_EQ(0U, s.count);
|
|
|
|
ASSERT_TRUE(sample.Accumulate(1, 2));
|
|
s = sample.Extract();
|
|
EXPECT_EQ(1U, s.bucket);
|
|
EXPECT_EQ(2U, s.count);
|
|
}
|
|
|
|
TEST(SingleSampleTest, Disable) {
|
|
AtomicSingleSample sample;
|
|
EXPECT_EQ(0U, sample.Extract().count);
|
|
EXPECT_FALSE(sample.IsDisabled());
|
|
|
|
ASSERT_TRUE(sample.Accumulate(9, 1));
|
|
EXPECT_EQ(1U, sample.ExtractAndDisable().count);
|
|
EXPECT_TRUE(sample.IsDisabled());
|
|
|
|
ASSERT_FALSE(sample.Accumulate(9, 1));
|
|
EXPECT_EQ(0U, sample.Extract().count);
|
|
// The sample should still be disabled.
|
|
EXPECT_TRUE(sample.IsDisabled());
|
|
}
|
|
|
|
TEST(SingleSampleTest, Accumulate) {
|
|
AtomicSingleSample sample;
|
|
|
|
ASSERT_TRUE(sample.Accumulate(9, 1));
|
|
ASSERT_TRUE(sample.Accumulate(9, 2));
|
|
ASSERT_TRUE(sample.Accumulate(9, 4));
|
|
ASSERT_FALSE(sample.Accumulate(10, 1));
|
|
EXPECT_EQ(7U, sample.Extract().count);
|
|
|
|
ASSERT_TRUE(sample.Accumulate(9, 4));
|
|
ASSERT_TRUE(sample.Accumulate(9, -2));
|
|
ASSERT_TRUE(sample.Accumulate(9, 1));
|
|
ASSERT_FALSE(sample.Accumulate(10, 1));
|
|
EXPECT_EQ(3U, sample.Extract().count);
|
|
}
|
|
|
|
TEST(SingleSampleTest, Overflow) {
|
|
AtomicSingleSample sample;
|
|
|
|
ASSERT_TRUE(sample.Accumulate(9, 1));
|
|
ASSERT_FALSE(sample.Accumulate(9, -2));
|
|
EXPECT_EQ(1U, sample.Extract().count);
|
|
|
|
ASSERT_TRUE(sample.Accumulate(9, std::numeric_limits<uint16_t>::max()));
|
|
ASSERT_FALSE(sample.Accumulate(9, 1));
|
|
EXPECT_EQ(std::numeric_limits<uint16_t>::max(), sample.Extract().count);
|
|
}
|
|
|
|
} // namespace base
|