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// Copyright 2018 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/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/strings/string_number_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "chrome/browser/ash/system/procfs_util.h"
namespace ash {
namespace system {
class ProcfsUtilTest : public testing::Test {
public:
ProcfsUtilTest() {
CHECK(temp_dir_.CreateUniqueTempDir());
slash_proc_ = temp_dir_.GetPath().Append("proc");
CHECK(base::CreateDirectory(slash_proc_));
}
ProcfsUtilTest(const ProcfsUtilTest&) = delete;
ProcfsUtilTest& operator=(const ProcfsUtilTest&) = delete;
~ProcfsUtilTest() override = default;
// Write |contents| to file |file_name| under /proc.
void WriteContentsToFile(const std::string& contents,
const std::string& file_name) {
base::FilePath file_path = slash_proc_.Append(file_name);
EXPECT_TRUE(base::WriteFile(file_path, contents));
}
// Create a directory |dir_name| under /proc and write |contents| to file
// |file_name| under this directory.
void WriteContentsToFileUnderSubdir(const std::string& contents,
const std::string& dir_name,
const std::string& file_name) {
base::FilePath dir = slash_proc_.Append(dir_name);
CHECK(base::CreateDirectory(dir));
base::FilePath file = dir.Append(file_name);
EXPECT_TRUE(base::WriteFile(file, contents));
}
protected:
base::FilePath slash_proc_;
private:
base::ScopedTempDir temp_dir_;
};
TEST_F(ProcfsUtilTest, GetSingleProcStatSuccess) {
pid_t pid = 201664;
std::string stat_contents =
"201664 (cinnamon) R 8052 7598 7598 0 -1 4194304 534106 9235 13 7 466410 "
"80831 119 33 20 0 6 0 51830217 2267480064 130441 184467440737095 "
"51615 93909892808704 93909892818200 140737448703360 0 0 0 0 16781312 "
"16384 0 0 0 17 17 0 0 1 0 0 93909894917032 93909894918272 939099184 "
"98816 140737448704343 140737448704372 140737448704372 140737448706022 0";
SingleProcStat expected = {.pid = pid,
.name = "cinnamon",
.ppid = 8052,
.utime = 466410,
.stime = 80831,
.rss = 130441};
WriteContentsToFileUnderSubdir(stat_contents, base::NumberToString(pid),
"stat");
EXPECT_EQ(expected,
GetSingleProcStat(
slash_proc_.Append(base::NumberToString(pid)).Append("stat"))
.value());
}
TEST_F(ProcfsUtilTest, GetCpuTimeJiffiesSuccess) {
std::string contents =
"cpu 107994940 2443611 104428507 5684138545 584527 0 738084 0 0 0\n"
"cpu0 18429992 58198 36166540 67167135 4456 0 301562 0 0 0\n"
"cpu1 1703401 63770 633494 119688031 10157 0 231948 0 0 0\n"
"cpu2 1663060 53891 869722 120301343 6427 0 36396 0 0 0\n"
"cpu3 1589143 42113 800045 120506135 10204 0 10237 0 0 0\n"
"cpu4 1520958 51244 723693 120652995 11833 0 5132 0 0 0\n";
int64_t expected =
107994940 + 2443611 + 104428507 + 5684138545 + 584527 + 0 + 738084 + 0;
WriteContentsToFile(contents, "stat");
EXPECT_EQ(expected, GetCpuTimeJiffies(slash_proc_.Append("stat")).value());
}
} // namespace system
} // namespace ash
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