139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "android-base/file.h"
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#include <gtest/gtest.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string>
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#include "android-base/test_utils.h"
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TEST(file, ReadFileToString_ENOENT) {
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std::string s("hello");
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errno = 0;
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ASSERT_FALSE(android::base::ReadFileToString("/proc/does-not-exist", &s));
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EXPECT_EQ(ENOENT, errno);
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EXPECT_EQ("", s); // s was cleared.
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}
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TEST(file, ReadFileToString_WriteStringToFile) {
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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ASSERT_TRUE(android::base::WriteStringToFile("abc", tf.path))
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<< strerror(errno);
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std::string s;
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ASSERT_TRUE(android::base::ReadFileToString(tf.path, &s))
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<< strerror(errno);
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EXPECT_EQ("abc", s);
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}
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// WriteStringToFile2 is explicitly for setting Unix permissions, which make no
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// sense on Windows.
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#if !defined(_WIN32)
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TEST(file, WriteStringToFile2) {
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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ASSERT_TRUE(android::base::WriteStringToFile("abc", tf.path, 0660,
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getuid(), getgid()))
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<< strerror(errno);
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struct stat sb;
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ASSERT_EQ(0, stat(tf.path, &sb));
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ASSERT_EQ(0660U, static_cast<unsigned int>(sb.st_mode & ~S_IFMT));
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ASSERT_EQ(getuid(), sb.st_uid);
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ASSERT_EQ(getgid(), sb.st_gid);
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std::string s;
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ASSERT_TRUE(android::base::ReadFileToString(tf.path, &s))
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<< strerror(errno);
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EXPECT_EQ("abc", s);
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}
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#endif
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TEST(file, WriteStringToFd) {
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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ASSERT_TRUE(android::base::WriteStringToFd("abc", tf.fd));
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ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
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std::string s;
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ASSERT_TRUE(android::base::ReadFdToString(tf.fd, &s)) << strerror(errno);
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EXPECT_EQ("abc", s);
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}
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TEST(file, WriteFully) {
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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ASSERT_TRUE(android::base::WriteFully(tf.fd, "abc", 3));
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ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
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std::string s;
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s.resize(3);
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ASSERT_TRUE(android::base::ReadFully(tf.fd, &s[0], s.size()))
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<< strerror(errno);
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EXPECT_EQ("abc", s);
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ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
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s.resize(1024);
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ASSERT_FALSE(android::base::ReadFully(tf.fd, &s[0], s.size()));
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}
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TEST(file, RemoveFileIfExist) {
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TemporaryFile tf;
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ASSERT_TRUE(tf.fd != -1);
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close(tf.fd);
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tf.fd = -1;
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std::string err;
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ASSERT_TRUE(android::base::RemoveFileIfExists(tf.path, &err)) << err;
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ASSERT_TRUE(android::base::RemoveFileIfExists(tf.path));
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TemporaryDir td;
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ASSERT_FALSE(android::base::RemoveFileIfExists(td.path));
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ASSERT_FALSE(android::base::RemoveFileIfExists(td.path, &err));
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ASSERT_EQ("is not a regular or symbol link file", err);
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}
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TEST(file, Readlink) {
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#if !defined(_WIN32)
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// Linux doesn't allow empty symbolic links.
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std::string min("x");
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// ext2 and ext4 both have PAGE_SIZE limits.
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std::string max(static_cast<size_t>(4096 - 1), 'x');
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TemporaryDir td;
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std::string min_path{std::string(td.path) + "/" + "min"};
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std::string max_path{std::string(td.path) + "/" + "max"};
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ASSERT_EQ(0, symlink(min.c_str(), min_path.c_str()));
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ASSERT_EQ(0, symlink(max.c_str(), max_path.c_str()));
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std::string result;
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result = "wrong";
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ASSERT_TRUE(android::base::Readlink(min_path, &result));
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ASSERT_EQ(min, result);
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result = "wrong";
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ASSERT_TRUE(android::base::Readlink(max_path, &result));
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ASSERT_EQ(max, result);
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#endif
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}
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