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#include <gtest/gtest.h>
#include "io.hh"
#include <cstdlib>
#include <cerrno>
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
namespace {
bool remove_recursive(int fd) {
auto* dir = fdopendir(fd);
if (!dir) return false;
while (auto* ent = readdir(dir)) {
if (ent->d_name[0] == '.') {
if (ent->d_name[1] == '\0') continue;
if (ent->d_name[1] == '.' && ent->d_name[2] == '\0') continue;
}
bool is_dir;
if (ent->d_type == DT_DIR) {
is_dir = true;
} else if (ent->d_type == DT_UNKNOWN) {
struct stat buf;
if (fstatat(dirfd(dir), ent->d_name, &buf, AT_SYMLINK_NOFOLLOW) == 0) {
is_dir = S_ISDIR(buf.st_mode);
} else {
if (errno != ENOENT) {
closedir(dir);
return false;
}
is_dir = false;
}
} else {
is_dir = false;
}
if (is_dir) {
int fd2 = openat(dirfd(dir), ent->d_name, O_RDONLY | O_DIRECTORY);
if (fd2 == -1) {
if (errno != ENOENT) {
closedir(dir);
return false;
}
} else {
if (!remove_recursive(fd2)) {
closedir(dir);
return false;
}
}
}
if (unlinkat(dirfd(dir), ent->d_name, is_dir ? AT_REMOVEDIR : 0)) {
if (errno != ENOENT) {
closedir(dir);
return false;
}
}
}
closedir(dir);
return true;
}
class IoTest : public testing::Test {
protected:
void SetUp() override {
// NOLINTNEXTLINE(misc-include-cleaner)
tmpdir_ = P_tmpdir "/jkc-test-io-XXXXXX";
// NOLINTNEXTLINE(misc-include-cleaner)
auto* ret = mkdtemp(tmpdir_.data());
ASSERT_EQ(ret, tmpdir_.data());
dirfd_ = open(tmpdir_.c_str(), O_PATH | O_DIRECTORY);
ASSERT_NE(-1, dirfd_);
}
void TearDown() override {
int fd = openat(dirfd_, ".", O_RDONLY | O_DIRECTORY);
EXPECT_NE(-1, fd);
if (fd != -1) {
EXPECT_TRUE(remove_recursive(fd));
}
close(dirfd_);
rmdir(tmpdir_.c_str());
}
[[nodiscard]] int dirfd() const {
return dirfd_;
}
void touch(const std::string& name, const std::string& value = "") {
auto fd = openat(dirfd(), name.c_str(), O_CREAT | O_WRONLY | O_TRUNC, 0700);
EXPECT_NE(-1, fd);
if (fd == -1) return;
size_t offset = 0;
while (offset < value.size()) {
auto ret = write(fd, value.data() + offset, value.size() - offset);
EXPECT_LT(0, ret);
if (ret <= 0) {
break;
}
offset += ret;
}
close(fd);
}
private:
int dirfd_;
std::string tmpdir_;
};
} // namespace
TEST_F(IoTest, no_such_file) {
auto ret = io::openat(dirfd(), "no-such-file");
ASSERT_FALSE(ret.has_value());
EXPECT_EQ(io::OpenError::NoSuchFile, ret.error());
}
TEST_F(IoTest, read_empty) {
touch("test");
auto ret = io::openat(dirfd(), "test");
ASSERT_TRUE(ret.has_value());
std::string tmp(10, ' ');
auto ret2 = ret.value()->read(tmp);
ASSERT_TRUE(ret2.has_value());
EXPECT_EQ(0, ret2.value());
}
TEST_F(IoTest, read) {
touch("test", "hello world");
auto ret = io::openat(dirfd(), "test");
ASSERT_TRUE(ret.has_value());
std::string tmp(12, ' ');
auto ret2 = ret.value()->repeat_read(tmp);
ASSERT_TRUE(ret2.has_value());
EXPECT_EQ(11, ret2.value());
tmp.resize(ret2.value());
EXPECT_EQ("hello world", tmp);
}
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