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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/metrics/pressure/pressure_metrics.h"
#include <optional>
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/test/metrics/histogram_tester.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/test/browser_task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
const char kCPUPressureHistogramName[] = "System.Pressure.CPU";
}
TEST(PressureMetricsTest, ParseInvalidPressureFile) {
base::ScopedTempDir tmp_dir;
ASSERT_TRUE(tmp_dir.CreateUniqueTempDir());
base::FilePath cpu_pressure_path = tmp_dir.GetPath().Append("cpu");
PressureMetrics cpu_pressure(kCPUPressureHistogramName, cpu_pressure_path);
struct {
const char* message;
const char* file_content;
} kTestCases[] = {
{"An empty file should not parse", ""},
{"Single line file should not parse",
"some avg10=27.12 avg60=20.01 avg300=10.42 total=13351656 full "
"avg10=7.52 avg60=4.01 avg300=0.42 total=168256"},
{"Incorrect prefix should not parse",
"S0M3 avg10=27.12 avg60=20.01 avg300=10.42 total=13351656\n"
"FU11 avg10=7.52 avg60=4.01 avg300=0.42 total=168256\n"},
{"Incomplete line should not parse", "some\nfull"},
{"Missing columns should not parse.",
"some avg10=27.12\nfull avg10=7.52"},
{"Invalid float values should not parse.",
"some avg10=XX.YY avg60=20.01 avg300=10.42 total=13351656\n"
"full avg10=7.52 avg60=4.01 avg300=0.42 total=168256\n"},
{"Flipped lines should not parse",
"full avg10=0.04 avg60=0.05 avg300=0.06 total=1\n"
"some avg10=0.01 avg60=0.02 avg300=0.03 total=1\n"}};
for (const auto& test_case : kTestCases) {
SCOPED_TRACE(::testing::Message() << test_case.message);
ASSERT_TRUE(base::WriteFile(cpu_pressure_path, test_case.file_content));
EXPECT_FALSE(cpu_pressure.CollectCurrentPressure().has_value());
}
}
TEST(PressureMetricsTest, ParseValidPressureFile) {
base::ScopedTempDir tmp_dir;
ASSERT_TRUE(tmp_dir.CreateUniqueTempDir());
base::FilePath cpu_pressure_path = tmp_dir.GetPath().Append("cpu");
PressureMetrics cpu_pressure(kCPUPressureHistogramName, cpu_pressure_path);
struct {
const char* message;
const char* file_content;
} kTestCases[] = {
{"No ending newline",
"some avg10=0.01 avg60=0.02 avg300=0.03 total=1\n"
"full avg10=0.04 avg60=0.05 avg300=0.06 total=1"},
{"One ending newline",
"some avg10=0.01 avg60=0.02 avg300=0.03 total=1\n"
"full avg10=0.04 avg60=0.05 avg300=0.06 total=1\n"},
{"Multiple ending newlines",
"some avg10=0.01 avg60=0.02 avg300=0.03 total=1\n"
"full avg10=0.04 avg60=0.05 avg300=0.06 total=1\n\n"},
};
for (const auto& test_case : kTestCases) {
SCOPED_TRACE(::testing::Message() << test_case.message);
ASSERT_TRUE(base::WriteFile(cpu_pressure_path, test_case.file_content));
EXPECT_TRUE(cpu_pressure.CollectCurrentPressure().has_value());
}
}
TEST(PressureMetricsTest, ParseValidPressureFileAndPressureValues) {
base::ScopedTempDir tmp_dir;
ASSERT_TRUE(tmp_dir.CreateUniqueTempDir());
base::FilePath cpu_pressure_path = tmp_dir.GetPath().Append("cpu");
PressureMetrics cpu_pressure(kCPUPressureHistogramName, cpu_pressure_path);
// Valid input should parse.
ASSERT_TRUE(
base::WriteFile(cpu_pressure_path,
"some avg10=0.01 avg60=0.02 avg300=0.03 total=1\n"
"full avg10=0.04 avg60=0.05 avg300=0.06 total=1\n"));
std::optional<PressureMetrics::Sample> sample =
cpu_pressure.CollectCurrentPressure();
EXPECT_TRUE(sample.has_value());
EXPECT_DOUBLE_EQ(sample->some_avg10, 0.01);
EXPECT_DOUBLE_EQ(sample->some_avg60, 0.02);
EXPECT_DOUBLE_EQ(sample->some_avg300, 0.03);
EXPECT_DOUBLE_EQ(sample->full_avg10, 0.04);
EXPECT_DOUBLE_EQ(sample->full_avg60, 0.05);
EXPECT_DOUBLE_EQ(sample->full_avg300, 0.06);
}
TEST(PressureMetricsTest, MetricsAreEmitted) {
base::ScopedTempDir tmp_dir;
ASSERT_TRUE(tmp_dir.CreateUniqueTempDir());
base::FilePath cpu_pressure_path = tmp_dir.GetPath().Append("cpu");
ASSERT_TRUE(base::WriteFile(
cpu_pressure_path,
"some avg10=27.12 avg60=20.01 avg300=10.42 total=13351656\nfull "
"avg10=7.52 avg60=4.01 avg300=0.42 total=168256\n"));
PressureMetrics cpu_pressure(kCPUPressureHistogramName, cpu_pressure_path);
std::optional<PressureMetrics::Sample> sample =
cpu_pressure.CollectCurrentPressure();
ASSERT_TRUE(sample.has_value());
base::HistogramTester histogram_tester;
cpu_pressure.ReportToUMA(sample.value());
constexpr int kExpectedPressure = 27;
histogram_tester.ExpectUniqueSample(kCPUPressureHistogramName,
kExpectedPressure, 1);
}
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