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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/metrics/psi_memory_parser.h"
#include <memory>
#include "base/files/file_util.h"
#include "base/metrics/statistics_recorder.h"
#include "base/test/metrics/histogram_tester.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace metrics {
namespace {
// Just as the kernel outputs.
const char kFileContents1[] =
"some avg10=23.10 avg60=5.06 avg300=15.10 total=417963\n"
"full avg10=9.00 avg60=19.20 avg300=3.23 total=205933\n";
// Number of decimals not consistent, slightly malformed - but acceptable.
const char kFileContents2[] =
"some avg10=24 avg60=5.06 avg300=15.10 total=417963\n"
"full avg10=9.2 avg60=19.20 avg300=3.23 total=205933\n";
} // namespace
class PSIMemoryParserTest : public testing::Test {
public:
PSIMemoryParserTest() = default;
~PSIMemoryParserTest() override = default;
void Init(uint32_t period) {
cit_ = std::make_unique<PSIMemoryParser>(period);
}
uint32_t GetPeriod() { return cit_->GetPeriod(); }
base::HistogramTester& Histograms() { return histogram_tester_; }
std::unique_ptr<PSIMemoryParser>& Cit() { return cit_; }
const std::string& GetMetricPrefix() { return cit_->metric_prefix_; }
void KillCit() { cit_.reset(); }
private:
std::unique_ptr<PSIMemoryParser> cit_;
base::HistogramTester histogram_tester_;
};
TEST_F(PSIMemoryParserTest, CustomInterval) {
Init(60u);
EXPECT_EQ(60u, GetPeriod());
}
TEST_F(PSIMemoryParserTest, InvalidInterval) {
Init(15u);
EXPECT_EQ(10u, GetPeriod());
}
TEST_F(PSIMemoryParserTest, InternalsA) {
Init(10u);
std::string testContent1 = "prefix" + GetMetricPrefix() + "9.37 suffix";
EXPECT_EQ(10u, GetPeriod());
size_t s = 0;
size_t e = 0;
EXPECT_EQ(false, internal::FindMiddleString(testContent1, 0, "nothere",
"suffix", &s, &e));
EXPECT_EQ(false, internal::FindMiddleString(testContent1, 0, "prefix",
"notthere", &s, &e));
EXPECT_EQ(true, internal::FindMiddleString(testContent1, 0, "prefix",
"suffix", &s, &e));
EXPECT_EQ(6u, s);
EXPECT_EQ(17u, e);
EXPECT_EQ(937, Cit()->GetMetricValue(testContent1, s, e));
std::string testContent2 = "extra " + testContent1;
EXPECT_EQ(true, internal::FindMiddleString(testContent2, 0, "prefix",
"suffix", &s, &e));
EXPECT_EQ(12u, s);
EXPECT_EQ(23u, e);
EXPECT_EQ(937, Cit()->GetMetricValue(testContent2, s, e));
}
TEST_F(PSIMemoryParserTest, InternalsB) {
Init(300);
int msome;
int mfull;
ParsePSIMemStatus stat;
stat = Cit()->ParseMetrics(kFileContents1, &msome, &mfull);
EXPECT_EQ(ParsePSIMemStatus::kSuccess, stat);
EXPECT_EQ(1510, msome);
EXPECT_EQ(323, mfull);
}
TEST_F(PSIMemoryParserTest, InternalsC) {
Init(60);
int msome;
int mfull;
ParsePSIMemStatus stat;
stat = Cit()->ParseMetrics(kFileContents1, &msome, &mfull);
EXPECT_EQ(ParsePSIMemStatus::kSuccess, stat);
EXPECT_EQ(506, msome);
EXPECT_EQ(1920, mfull);
}
TEST_F(PSIMemoryParserTest, InternalsD) {
Init(10);
int msome;
int mfull;
ParsePSIMemStatus stat;
stat = Cit()->ParseMetrics(kFileContents1, &msome, &mfull);
EXPECT_EQ(ParsePSIMemStatus::kSuccess, stat);
EXPECT_EQ(2310, msome);
EXPECT_EQ(900, mfull);
}
TEST_F(PSIMemoryParserTest, InternalsE) {
Init(10);
int msome;
int mfull;
ParsePSIMemStatus stat;
stat = Cit()->ParseMetrics(kFileContents2, &msome, &mfull);
EXPECT_EQ(ParsePSIMemStatus::kSuccess, stat);
EXPECT_EQ(2400, msome);
EXPECT_EQ(920, mfull);
}
TEST_F(PSIMemoryParserTest, ParseResultCounter) {
Init(10);
Cit()->LogParseStatus(ParsePSIMemStatus::kSuccess);
Cit()->LogParseStatus(ParsePSIMemStatus::kInvalidMetricFormat);
Cit()->LogParseStatus(ParsePSIMemStatus::kInvalidMetricFormat);
Histograms().ExpectBucketCount("ChromeOS.CWP.ParsePSIMemory",
ParsePSIMemStatus::kSuccess, 1);
Histograms().ExpectBucketCount("ChromeOS.CWP.ParsePSIMemory",
ParsePSIMemStatus::kInvalidMetricFormat, 2);
}
} // namespace metrics
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