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// 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 "chromeos/system/cpu_temperature_reader.h"
#include <algorithm>
#include <string>
#include "base/files/file.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace chromeos {
namespace system {
class CPUTemperatureReaderTest : public ::testing::Test {
public:
CPUTemperatureReaderTest() {
CHECK(dir_.CreateUniqueTempDir());
hwmon_path_ = dir_.GetPath();
reader_.set_hwmon_dir_for_test(hwmon_path_);
}
~CPUTemperatureReaderTest() override = default;
protected:
using CPUTemperatureInfo = CPUTemperatureReader::CPUTemperatureInfo;
// Creates a subdirectory in |hwmon_path_| with name |name|. Returns the full
// path of the new subdirectory.
base::FilePath CreateHwmonSubdir(const std::string& name) {
base::FilePath subdir_path = hwmon_path_.Append(name);
CHECK(base::CreateDirectory(subdir_path));
return subdir_path;
}
// Creates a file at |path| containing data |contents|.
void CreateFileWithContents(const base::FilePath& path,
const std::string& contents) {
CHECK_EQ(WriteFile(path, contents.data(), contents.size()),
static_cast<int>(contents.size()));
}
// Creates a temporary dir to act as the hwmon directory passed to |reader_|.
base::ScopedTempDir dir_;
// Path of the temporary dir created by |dir_|.
base::FilePath hwmon_path_;
// Instance of the class under test
CPUTemperatureReader reader_;
};
TEST_F(CPUTemperatureReaderTest, EmptyDir) {
base::FilePath subdir_empty = CreateHwmonSubdir("hwmon0");
base::FilePath subdir_not_temp = CreateHwmonSubdir("hwmon1");
CreateFileWithContents(subdir_not_temp.Append("not_cpu_temp"), "garbage");
EXPECT_EQ(0U, reader_.GetCPUTemperatures().size());
}
TEST_F(CPUTemperatureReaderTest, SingleDir) {
base::FilePath subdir = CreateHwmonSubdir("hwmon0");
CreateFileWithContents(subdir.Append("temp1_input"), "10000\n");
std::vector<CPUTemperatureInfo> cpu_temp_readings =
reader_.GetCPUTemperatures();
ASSERT_EQ(1U, cpu_temp_readings.size());
EXPECT_EQ(10.0f, cpu_temp_readings[0].temp_celsius);
EXPECT_EQ(subdir.Append("temp1_label").value(), cpu_temp_readings[0].label);
}
TEST_F(CPUTemperatureReaderTest, SingleDirWithLabel) {
base::FilePath subdir = CreateHwmonSubdir("hwmon0");
CreateFileWithContents(subdir.Append("temp2_input"), "20000\n");
CreateFileWithContents(subdir.Append("temp2_label"), "t2\n");
std::vector<CPUTemperatureInfo> cpu_temp_readings =
reader_.GetCPUTemperatures();
ASSERT_EQ(1U, cpu_temp_readings.size());
EXPECT_EQ(20.0f, cpu_temp_readings[0].temp_celsius);
EXPECT_EQ("t2", cpu_temp_readings[0].label);
}
TEST_F(CPUTemperatureReaderTest, SingleDirWithName) {
base::FilePath subdir = CreateHwmonSubdir("hwmon0");
CreateFileWithContents(subdir.Append("temp3_input"), "30000\n");
CreateFileWithContents(subdir.Append("temp3_label"), "\n");
CreateFileWithContents(subdir.Append("name"), "t3\n");
std::vector<CPUTemperatureInfo> cpu_temp_readings =
reader_.GetCPUTemperatures();
ASSERT_EQ(1U, cpu_temp_readings.size());
EXPECT_EQ(30.0f, cpu_temp_readings[0].temp_celsius);
EXPECT_EQ("t3", cpu_temp_readings[0].label);
}
TEST_F(CPUTemperatureReaderTest, SingleDirWithDeviceSubdir) {
base::FilePath subdir = CreateHwmonSubdir("hwmon0");
CreateFileWithContents(subdir.Append("temp1_input"), "10000\n");
base::FilePath device_subdir = subdir.Append("device");
base::CreateDirectory(device_subdir);
CreateFileWithContents(device_subdir.Append("temp1_input"), "20000\n");
std::vector<CPUTemperatureInfo> cpu_temp_readings =
reader_.GetCPUTemperatures();
ASSERT_EQ(2U, cpu_temp_readings.size());
EXPECT_EQ(10.0f, cpu_temp_readings[0].temp_celsius);
EXPECT_EQ(subdir.Append("temp1_label").value(), cpu_temp_readings[0].label);
EXPECT_EQ(20.0f, cpu_temp_readings[1].temp_celsius);
EXPECT_EQ(device_subdir.Append("temp1_label").value(),
cpu_temp_readings[1].label);
}
TEST_F(CPUTemperatureReaderTest, MultipleDirs) {
base::FilePath subdir0 = CreateHwmonSubdir("hwmon0");
CreateFileWithContents(subdir0.Append("temp1_input"), "10000\n");
base::FilePath subdir1 = CreateHwmonSubdir("hwmon1");
CreateFileWithContents(subdir1.Append("temp2_input"), "20000\n");
CreateFileWithContents(subdir1.Append("temp2_label"), "t2\n");
// This should not result in a CPU temperature reading.
base::FilePath subdir2 = CreateHwmonSubdir("hwmon2");
CreateFileWithContents(subdir2.Append("not_cpu_temp"), "garbage");
base::FilePath subdir3 = CreateHwmonSubdir("hwmon3");
CreateFileWithContents(subdir3.Append("temp3_input"), "30000\n");
CreateFileWithContents(subdir3.Append("temp3_label"), "t3\n");
std::vector<CPUTemperatureInfo> cpu_temp_readings =
reader_.GetCPUTemperatures();
// The order in which these directories were read is not guaranteed. Sort them
// first.
std::sort(cpu_temp_readings.begin(), cpu_temp_readings.end());
ASSERT_EQ(3U, cpu_temp_readings.size());
EXPECT_EQ(10.0f, cpu_temp_readings[0].temp_celsius);
EXPECT_EQ(subdir0.Append("temp1_label").value(), cpu_temp_readings[0].label);
EXPECT_EQ(20.0f, cpu_temp_readings[1].temp_celsius);
EXPECT_EQ("t2", cpu_temp_readings[1].label);
EXPECT_EQ(30.0f, cpu_temp_readings[2].temp_celsius);
EXPECT_EQ("t3", cpu_temp_readings[2].label);
}
} // namespace system
} // namespace chromeos
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