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// Copyright 2014 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "brillo/file_utils.h"
#include <sys/stat.h>
#include <unistd.h>
#include <string>
#include <base/files/file_util.h>
#include <base/files/scoped_temp_dir.h>
#include <gtest/gtest.h>
namespace brillo {
class FileUtilsTest : public testing::Test {
public:
FileUtilsTest() {
CHECK(temp_dir_.CreateUniqueTempDir());
file_path_ = temp_dir_.path().Append("test.temp");
}
protected:
base::FilePath file_path_;
base::ScopedTempDir temp_dir_;
// Writes |contents| to |file_path_|. Pulled into a separate function just
// to improve readability of tests.
void WriteFile(const std::string& contents) {
EXPECT_EQ(contents.length(),
base::WriteFile(file_path_, contents.c_str(), contents.length()));
}
// Verifies that the file at |file_path_| exists and contains |contents|.
void ExpectFileContains(const std::string& contents) {
EXPECT_TRUE(base::PathExists(file_path_));
std::string new_contents;
EXPECT_TRUE(base::ReadFileToString(file_path_, &new_contents));
EXPECT_EQ(contents, new_contents);
}
// Verifies that the file at |file_path_| has |permissions|.
void ExpectFilePermissions(int permissions) {
int actual_permissions;
EXPECT_TRUE(base::GetPosixFilePermissions(file_path_, &actual_permissions));
EXPECT_EQ(permissions, actual_permissions);
}
};
namespace {
enum {
kPermissions600 =
base::FILE_PERMISSION_READ_BY_USER | base::FILE_PERMISSION_WRITE_BY_USER,
kPermissions700 = base::FILE_PERMISSION_USER_MASK,
kPermissions777 = base::FILE_PERMISSION_MASK
};
} // namespace
TEST_F(FileUtilsTest, TouchFileCreate) {
EXPECT_TRUE(TouchFile(file_path_));
ExpectFileContains("");
ExpectFilePermissions(kPermissions600);
}
TEST_F(FileUtilsTest, TouchFileCreateThroughUmask) {
mode_t old_umask = umask(kPermissions777);
EXPECT_TRUE(TouchFile(file_path_));
umask(old_umask);
ExpectFileContains("");
ExpectFilePermissions(kPermissions600);
}
TEST_F(FileUtilsTest, TouchFileCreateDirectoryStructure) {
file_path_ = temp_dir_.path().Append("foo/bar/baz/test.temp");
EXPECT_TRUE(TouchFile(file_path_));
ExpectFileContains("");
}
TEST_F(FileUtilsTest, TouchFileExisting) {
WriteFile("abcd");
EXPECT_TRUE(TouchFile(file_path_));
ExpectFileContains("abcd");
}
TEST_F(FileUtilsTest, TouchFileReplaceDirectory) {
EXPECT_TRUE(base::CreateDirectory(file_path_));
EXPECT_TRUE(TouchFile(file_path_));
EXPECT_FALSE(base::DirectoryExists(file_path_));
ExpectFileContains("");
}
TEST_F(FileUtilsTest, TouchFileReplaceSymlink) {
base::FilePath symlink_target = temp_dir_.path().Append("target.temp");
EXPECT_TRUE(base::CreateSymbolicLink(symlink_target, file_path_));
EXPECT_TRUE(TouchFile(file_path_));
EXPECT_FALSE(base::IsLink(file_path_));
ExpectFileContains("");
}
TEST_F(FileUtilsTest, TouchFileReplaceOtherUser) {
WriteFile("abcd");
EXPECT_TRUE(TouchFile(file_path_, kPermissions777, geteuid() + 1, getegid()));
ExpectFileContains("");
}
TEST_F(FileUtilsTest, TouchFileReplaceOtherGroup) {
WriteFile("abcd");
EXPECT_TRUE(TouchFile(file_path_, kPermissions777, geteuid(), getegid() + 1));
ExpectFileContains("");
}
TEST_F(FileUtilsTest, TouchFileCreateWithAllPermissions) {
EXPECT_TRUE(TouchFile(file_path_, kPermissions777, geteuid(), getegid()));
ExpectFileContains("");
ExpectFilePermissions(kPermissions777);
}
TEST_F(FileUtilsTest, TouchFileCreateWithOwnerPermissions) {
EXPECT_TRUE(TouchFile(file_path_, kPermissions700, geteuid(), getegid()));
ExpectFileContains("");
ExpectFilePermissions(kPermissions700);
}
TEST_F(FileUtilsTest, TouchFileExistingPermissionsUnchanged) {
EXPECT_TRUE(TouchFile(file_path_, kPermissions777, geteuid(), getegid()));
EXPECT_TRUE(TouchFile(file_path_, kPermissions700, geteuid(), getegid()));
ExpectFileContains("");
ExpectFilePermissions(kPermissions777);
}
} // namespace brillo
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