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/*
* Copyright (C) 2013 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 "utils/file.h"
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <gtest/gtest.h>
class TemporaryFile {
public:
TemporaryFile() {
init("/data/local/tmp");
if (fd == -1) {
init("/tmp");
}
}
~TemporaryFile() {
close(fd);
unlink(filename);
}
int fd;
char filename[1024];
private:
void init(const char* tmp_dir) {
snprintf(filename, sizeof(filename), "%s/TemporaryFile-XXXXXX", tmp_dir);
fd = mkstemp(filename);
}
};
TEST(file, ReadFileToString_ENOENT) {
std::string s("hello");
errno = 0;
ASSERT_FALSE(android::ReadFileToString("/proc/does-not-exist", &s));
EXPECT_EQ(ENOENT, errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(file, ReadFileToString_success) {
std::string s("hello");
ASSERT_TRUE(android::ReadFileToString("/proc/version", &s)) << errno;
EXPECT_GT(s.length(), 6U);
EXPECT_EQ('\n', s[s.length() - 1]);
s[5] = 0;
EXPECT_STREQ("Linux", s.c_str());
}
TEST(file, WriteStringToFile) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(android::WriteStringToFile("abc", tf.filename)) << errno;
std::string s;
ASSERT_TRUE(android::ReadFileToString(tf.filename, &s)) << errno;
EXPECT_EQ("abc", s);
}
TEST(file, WriteStringToFd) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(android::WriteStringToFd("abc", tf.fd));
ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << errno;
std::string s;
ASSERT_TRUE(android::ReadFdToString(tf.fd, &s)) << errno;
EXPECT_EQ("abc", s);
}
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