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PL286/system/update_engine/common/utils_unittest.cc

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//
// Copyright (C) 2012 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "update_engine/common/utils.h"
#include <fcntl.h>
#include <stdint.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <string>
#include <vector>
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <base/files/scoped_temp_dir.h>
#include <gtest/gtest.h>
#include "update_engine/common/test_utils.h"
using std::string;
using std::vector;
namespace chromeos_update_engine {
class UtilsTest : public ::testing::Test { };
TEST(UtilsTest, CanParseECVersion) {
// Should be able to parse and valid key value line.
EXPECT_EQ("12345", utils::ParseECVersion("fw_version=12345"));
EXPECT_EQ("123456", utils::ParseECVersion(
"b=1231a fw_version=123456 a=fasd2"));
EXPECT_EQ("12345", utils::ParseECVersion("fw_version=12345"));
EXPECT_EQ("00VFA616", utils::ParseECVersion(
"vendor=\"sam\" fw_version=\"00VFA616\""));
// For invalid entries, should return the empty string.
EXPECT_EQ("", utils::ParseECVersion("b=1231a fw_version a=fasd2"));
}
TEST(UtilsTest, WriteFileOpenFailure) {
EXPECT_FALSE(utils::WriteFile("/this/doesn't/exist", "hello", 5));
}
TEST(UtilsTest, WriteFileReadFile) {
base::FilePath file;
EXPECT_TRUE(base::CreateTemporaryFile(&file));
ScopedPathUnlinker unlinker(file.value());
EXPECT_TRUE(utils::WriteFile(file.value().c_str(), "hello", 5));
brillo::Blob readback;
EXPECT_TRUE(utils::ReadFile(file.value().c_str(), &readback));
EXPECT_EQ("hello", string(readback.begin(), readback.end()));
}
TEST(UtilsTest, ReadFileFailure) {
brillo::Blob empty;
EXPECT_FALSE(utils::ReadFile("/this/doesn't/exist", &empty));
}
TEST(UtilsTest, ReadFileChunk) {
base::FilePath file;
EXPECT_TRUE(base::CreateTemporaryFile(&file));
ScopedPathUnlinker unlinker(file.value());
brillo::Blob data;
const size_t kSize = 1024 * 1024;
for (size_t i = 0; i < kSize; i++) {
data.push_back(i % 255);
}
EXPECT_TRUE(utils::WriteFile(file.value().c_str(), data.data(), data.size()));
brillo::Blob in_data;
EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), kSize, 10, &in_data));
EXPECT_TRUE(in_data.empty());
EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), 0, -1, &in_data));
EXPECT_TRUE(data == in_data);
in_data.clear();
EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), 10, 20, &in_data));
EXPECT_TRUE(brillo::Blob(data.begin() + 10, data.begin() + 10 + 20) ==
in_data);
}
TEST(UtilsTest, ErrnoNumberAsStringTest) {
EXPECT_EQ("No such file or directory", utils::ErrnoNumberAsString(ENOENT));
}
TEST(UtilsTest, IsSymlinkTest) {
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
string temp_file = temp_dir.path().Append("temp-file").value();
EXPECT_TRUE(utils::WriteFile(temp_file.c_str(), "", 0));
string temp_symlink = temp_dir.path().Append("temp-symlink").value();
EXPECT_EQ(0, symlink(temp_file.c_str(), temp_symlink.c_str()));
EXPECT_FALSE(utils::IsSymlink(temp_dir.path().value().c_str()));
EXPECT_FALSE(utils::IsSymlink(temp_file.c_str()));
EXPECT_TRUE(utils::IsSymlink(temp_symlink.c_str()));
EXPECT_FALSE(utils::IsSymlink("/non/existent/path"));
}
TEST(UtilsTest, SplitPartitionNameTest) {
string disk;
int part_num;
EXPECT_TRUE(utils::SplitPartitionName("/dev/sda3", &disk, &part_num));
EXPECT_EQ("/dev/sda", disk);
EXPECT_EQ(3, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/sdp1234", &disk, &part_num));
EXPECT_EQ("/dev/sdp", disk);
EXPECT_EQ(1234, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/mmcblk0p3", &disk, &part_num));
EXPECT_EQ("/dev/mmcblk0", disk);
EXPECT_EQ(3, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/ubiblock3_2", &disk, &part_num));
EXPECT_EQ("/dev/ubiblock", disk);
EXPECT_EQ(3, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/loop10", &disk, &part_num));
EXPECT_EQ("/dev/loop", disk);
EXPECT_EQ(10, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/loop28p11", &disk, &part_num));
EXPECT_EQ("/dev/loop28", disk);
EXPECT_EQ(11, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/loop10_0", &disk, &part_num));
EXPECT_EQ("/dev/loop", disk);
EXPECT_EQ(10, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/loop28p11_0", &disk, &part_num));
EXPECT_EQ("/dev/loop28", disk);
EXPECT_EQ(11, part_num);
EXPECT_FALSE(utils::SplitPartitionName("/dev/mmcblk0p", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("/dev/sda", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("/dev/foo/bar", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("/", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("", &disk, &part_num));
}
TEST(UtilsTest, MakePartitionNameTest) {
EXPECT_EQ("/dev/sda4", utils::MakePartitionName("/dev/sda", 4));
EXPECT_EQ("/dev/sda123", utils::MakePartitionName("/dev/sda", 123));
EXPECT_EQ("/dev/mmcblk2", utils::MakePartitionName("/dev/mmcblk", 2));
EXPECT_EQ("/dev/mmcblk0p2", utils::MakePartitionName("/dev/mmcblk0", 2));
EXPECT_EQ("/dev/loop8", utils::MakePartitionName("/dev/loop", 8));
EXPECT_EQ("/dev/loop12p2", utils::MakePartitionName("/dev/loop12", 2));
EXPECT_EQ("/dev/ubi5_0", utils::MakePartitionName("/dev/ubiblock", 5));
EXPECT_EQ("/dev/mtd4", utils::MakePartitionName("/dev/ubiblock", 4));
EXPECT_EQ("/dev/ubi3_0", utils::MakePartitionName("/dev/ubiblock", 3));
EXPECT_EQ("/dev/mtd2", utils::MakePartitionName("/dev/ubiblock", 2));
EXPECT_EQ("/dev/ubi1_0", utils::MakePartitionName("/dev/ubiblock", 1));
}
TEST(UtilsTest, MakePartitionNameForMountTest) {
EXPECT_EQ("/dev/sda4", utils::MakePartitionNameForMount("/dev/sda4"));
EXPECT_EQ("/dev/sda123", utils::MakePartitionNameForMount("/dev/sda123"));
EXPECT_EQ("/dev/mmcblk2", utils::MakePartitionNameForMount("/dev/mmcblk2"));
EXPECT_EQ("/dev/mmcblk0p2",
utils::MakePartitionNameForMount("/dev/mmcblk0p2"));
EXPECT_EQ("/dev/loop0", utils::MakePartitionNameForMount("/dev/loop0"));
EXPECT_EQ("/dev/loop8", utils::MakePartitionNameForMount("/dev/loop8"));
EXPECT_EQ("/dev/loop12p2",
utils::MakePartitionNameForMount("/dev/loop12p2"));
EXPECT_EQ("/dev/ubiblock5_0",
utils::MakePartitionNameForMount("/dev/ubiblock5_0"));
EXPECT_EQ("/dev/mtd4",
utils::MakePartitionNameForMount("/dev/ubi4_0"));
EXPECT_EQ("/dev/ubiblock3_0",
utils::MakePartitionNameForMount("/dev/ubiblock3"));
EXPECT_EQ("/dev/mtd2", utils::MakePartitionNameForMount("/dev/ubi2"));
EXPECT_EQ("/dev/ubi1_0",
utils::MakePartitionNameForMount("/dev/ubiblock1"));
}
TEST(UtilsTest, FuzzIntTest) {
static const uint32_t kRanges[] = { 0, 1, 2, 20 };
for (uint32_t range : kRanges) {
const int kValue = 50;
for (int tries = 0; tries < 100; ++tries) {
uint32_t value = utils::FuzzInt(kValue, range);
EXPECT_GE(value, kValue - range / 2);
EXPECT_LE(value, kValue + range - range / 2);
}
}
}
namespace {
void GetFileFormatTester(const string& expected,
const vector<uint8_t>& contents) {
test_utils::ScopedTempFile file;
ASSERT_TRUE(utils::WriteFile(file.path().c_str(),
reinterpret_cast<const char*>(contents.data()),
contents.size()));
EXPECT_EQ(expected, utils::GetFileFormat(file.path()));
}
} // namespace
TEST(UtilsTest, GetFileFormatTest) {
EXPECT_EQ("File not found.", utils::GetFileFormat("/path/to/nowhere"));
GetFileFormatTester("data", vector<uint8_t>{1, 2, 3, 4, 5, 6, 7, 8});
GetFileFormatTester("ELF", vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46});
// Real tests from cros_installer on different boards.
// ELF 32-bit LSB executable, Intel 80386
GetFileFormatTester(
"ELF 32-bit little-endian x86",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00,
0x90, 0x83, 0x04, 0x08, 0x34, 0x00, 0x00, 0x00});
// ELF 32-bit LSB executable, MIPS
GetFileFormatTester(
"ELF 32-bit little-endian mips",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x00, 0x08, 0x00, 0x01, 0x00, 0x00, 0x00,
0xc0, 0x12, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00});
// ELF 32-bit LSB executable, ARM
GetFileFormatTester(
"ELF 32-bit little-endian arm",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x28, 0x00, 0x01, 0x00, 0x00, 0x00,
0x85, 0x8b, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00});
// ELF 64-bit LSB executable, x86-64
GetFileFormatTester(
"ELF 64-bit little-endian x86-64",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x02, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x3e, 0x00, 0x01, 0x00, 0x00, 0x00,
0xb0, 0x04, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00});
}
TEST(UtilsTest, FormatTimeDeltaTest) {
// utils::FormatTimeDelta() is not locale-aware (it's only used for logging
// which is not localized) so we only need to test the C locale
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromMilliseconds(100)),
"0.1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(0)),
"0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(1)),
"1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(59)),
"59s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(60)),
"1m0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(61)),
"1m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(90)),
"1m30s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(1205)),
"20m5s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3600)),
"1h0m0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3601)),
"1h0m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3661)),
"1h1m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(7261)),
"2h1m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(86400)),
"1d0h0m0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(86401)),
"1d0h0m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(200000)),
"2d7h33m20s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(200000) +
base::TimeDelta::FromMilliseconds(1)),
"2d7h33m20.001s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(-1)),
"-1s");
}
TEST(UtilsTest, TimeFromStructTimespecTest) {
struct timespec ts;
// Unix epoch (Thursday 00:00:00 UTC on Jan 1, 1970)
ts = (struct timespec) {.tv_sec = 0, .tv_nsec = 0};
EXPECT_EQ(base::Time::UnixEpoch(), utils::TimeFromStructTimespec(&ts));
// 42 ms after the Unix billennium (Sunday 01:46:40 UTC on September 9, 2001)
ts = (struct timespec) {.tv_sec = 1000 * 1000 * 1000,
.tv_nsec = 42 * 1000 * 1000};
base::Time::Exploded exploded = (base::Time::Exploded) {
.year = 2001, .month = 9, .day_of_week = 0, .day_of_month = 9,
.hour = 1, .minute = 46, .second = 40, .millisecond = 42};
EXPECT_EQ(base::Time::FromUTCExploded(exploded),
utils::TimeFromStructTimespec(&ts));
}
TEST(UtilsTest, DecodeAndStoreBase64String) {
base::FilePath path;
// Ensure we return false on empty strings or invalid base64.
EXPECT_FALSE(utils::DecodeAndStoreBase64String("", &path));
EXPECT_FALSE(utils::DecodeAndStoreBase64String("not valid base64", &path));
// Pass known base64 and check that it matches. This string was generated
// the following way:
//
// $ echo "Update Engine" | base64
// VXBkYXRlIEVuZ2luZQo=
EXPECT_TRUE(utils::DecodeAndStoreBase64String("VXBkYXRlIEVuZ2luZQo=",
&path));
ScopedPathUnlinker unlinker(path.value());
string expected_contents = "Update Engine\n";
string contents;
EXPECT_TRUE(utils::ReadFile(path.value(), &contents));
EXPECT_EQ(contents, expected_contents);
EXPECT_EQ(static_cast<off_t>(expected_contents.size()),
utils::FileSize(path.value()));
}
TEST(UtilsTest, ConvertToOmahaInstallDate) {
// The Omaha Epoch starts at Jan 1, 2007 0:00 PST which is a
// Monday. In Unix time, this point in time is easily obtained via
// the date(1) command like this:
//
// $ date +"%s" --date="Jan 1, 2007 0:00 PST"
const time_t omaha_epoch = 1167638400;
int value;
// Points in time *on and after* the Omaha epoch should not fail.
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch), &value));
EXPECT_GE(value, 0);
// Anything before the Omaha epoch should fail. We test it for two points.
EXPECT_FALSE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch - 1), &value));
EXPECT_FALSE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch - 100*24*3600), &value));
// Check that we jump from 0 to 7 exactly on the one-week mark, e.g.
// on Jan 8, 2007 0:00 PST.
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 7*24*3600 - 1), &value));
EXPECT_EQ(value, 0);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 7*24*3600), &value));
EXPECT_EQ(value, 7);
// Check a couple of more values.
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 10*24*3600), &value));
EXPECT_EQ(value, 7);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 20*24*3600), &value));
EXPECT_EQ(value, 14);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 26*24*3600), &value));
EXPECT_EQ(value, 21);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 29*24*3600), &value));
EXPECT_EQ(value, 28);
// The date Jun 4, 2007 0:00 PDT is a Monday and is hence a point
// where the Omaha InstallDate jumps 7 days. Its unix time is
// 1180940400. Notably, this is a point in time where Daylight
// Savings Time (DST) was is in effect (e.g. it's PDT, not PST).
//
// Note that as utils::ConvertToOmahaInstallDate() _deliberately_
// ignores DST (as it's hard to implement in a thread-safe way using
// glibc, see comments in utils.h) we have to fudge by the DST
// offset which is one hour. Conveniently, if the function were
// someday modified to be DST aware, this test would have to be
// modified as well.
const time_t dst_time = 1180940400; // Jun 4, 2007 0:00 PDT.
const time_t fudge = 3600;
int value1, value2;
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(dst_time + fudge - 1), &value1));
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(dst_time + fudge), &value2));
EXPECT_EQ(value1, value2 - 7);
}
TEST(UtilsTest, GetMinorVersion) {
// Test GetMinorVersion by verifying that it parses the conf file and returns
// the correct value.
uint32_t minor_version;
brillo::KeyValueStore store;
EXPECT_FALSE(utils::GetMinorVersion(store, &minor_version));
EXPECT_TRUE(store.LoadFromString("PAYLOAD_MINOR_VERSION=one-two-three\n"));
EXPECT_FALSE(utils::GetMinorVersion(store, &minor_version));
EXPECT_TRUE(store.LoadFromString("PAYLOAD_MINOR_VERSION=123\n"));
EXPECT_TRUE(utils::GetMinorVersion(store, &minor_version));
EXPECT_EQ(123U, minor_version);
}
static bool BoolMacroTestHelper() {
int i = 1;
unsigned int ui = 1;
bool b = 1;
std::unique_ptr<char> cptr(new char);
TEST_AND_RETURN_FALSE(i);
TEST_AND_RETURN_FALSE(ui);
TEST_AND_RETURN_FALSE(b);
TEST_AND_RETURN_FALSE(cptr);
TEST_AND_RETURN_FALSE_ERRNO(i);
TEST_AND_RETURN_FALSE_ERRNO(ui);
TEST_AND_RETURN_FALSE_ERRNO(b);
TEST_AND_RETURN_FALSE_ERRNO(cptr);
return true;
}
static void VoidMacroTestHelper(bool* ret) {
int i = 1;
unsigned int ui = 1;
bool b = 1;
std::unique_ptr<char> cptr(new char);
*ret = false;
TEST_AND_RETURN(i);
TEST_AND_RETURN(ui);
TEST_AND_RETURN(b);
TEST_AND_RETURN(cptr);
TEST_AND_RETURN_ERRNO(i);
TEST_AND_RETURN_ERRNO(ui);
TEST_AND_RETURN_ERRNO(b);
TEST_AND_RETURN_ERRNO(cptr);
*ret = true;
}
TEST(UtilsTest, TestMacros) {
bool void_test = false;
VoidMacroTestHelper(&void_test);
EXPECT_TRUE(void_test);
EXPECT_TRUE(BoolMacroTestHelper());
}
TEST(UtilsTest, RunAsRootUnmountFilesystemFailureTest) {
EXPECT_FALSE(utils::UnmountFilesystem("/path/to/non-existing-dir"));
}
TEST(UtilsTest, RunAsRootUnmountFilesystemBusyFailureTest) {
string tmp_image;
EXPECT_TRUE(utils::MakeTempFile("img.XXXXXX", &tmp_image, nullptr));
ScopedPathUnlinker tmp_image_unlinker(tmp_image);
EXPECT_TRUE(base::CopyFile(
test_utils::GetBuildArtifactsPath().Append("gen/disk_ext2_4k.img"),
base::FilePath(tmp_image)));
base::ScopedTempDir mnt_dir;
EXPECT_TRUE(mnt_dir.CreateUniqueTempDir());
string loop_dev;
test_utils::ScopedLoopbackDeviceBinder loop_binder(
tmp_image, true, &loop_dev);
EXPECT_FALSE(utils::IsMountpoint(mnt_dir.path().value()));
// This is the actual test part. While we hold a file descriptor open for the
// mounted filesystem, umount should still succeed.
EXPECT_TRUE(utils::MountFilesystem(
loop_dev, mnt_dir.path().value(), MS_RDONLY, "ext4", ""));
// Verify the directory is a mount point now.
EXPECT_TRUE(utils::IsMountpoint(mnt_dir.path().value()));
string target_file = mnt_dir.path().Append("empty-file").value();
int fd = HANDLE_EINTR(open(target_file.c_str(), O_RDONLY));
EXPECT_GE(fd, 0);
EXPECT_TRUE(utils::UnmountFilesystem(mnt_dir.path().value()));
// The filesystem should be already unmounted at this point.
EXPECT_FALSE(utils::IsMountpoint(mnt_dir.path().value()));
IGNORE_EINTR(close(fd));
// The filesystem was already unmounted so this call should fail.
EXPECT_FALSE(utils::UnmountFilesystem(mnt_dir.path().value()));
}
TEST(UtilsTest, IsMountpointTest) {
EXPECT_TRUE(utils::IsMountpoint("/"));
EXPECT_FALSE(utils::IsMountpoint("/path/to/nowhere"));
base::ScopedTempDir mnt_dir;
EXPECT_TRUE(mnt_dir.CreateUniqueTempDir());
EXPECT_FALSE(utils::IsMountpoint(mnt_dir.path().value()));
base::FilePath file;
EXPECT_TRUE(base::CreateTemporaryFile(&file));
ScopedPathUnlinker unlinker(file.value());
EXPECT_FALSE(utils::IsMountpoint(file.value()));
}
} // namespace chromeos_update_engine