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#include "fcp/tensorflow/file_descriptor_filesystem.h"
#include <fcntl.h>
#include <memory>
#include <vector>
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "android-base/file.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "tensorflow/core/lib/core/status_test_util.h"
namespace tensorflow {
namespace fcp {
namespace {
using ::android::base::ReadFileToString;
using ::testing::TempDir;
static constexpr char kBadFdPath[] = "fd:///10000";
static constexpr char kFileContent[] = "abcdefgh";
static constexpr int kFileContentLen = 8;
class FileDescriptorFileSystemTest : public ::testing::Test {
protected:
void TearDown() override {
if (fd_ != -1) {
ASSERT_NE(-1, close(fd_));
}
}
// Writes contents to a temp file and sets fd_path_ to point to it. The opened
// file descriptor is closed automatically in TearDown(). To be called at most
// once per test.
void CreateAndOpenFdForTest(std::string contents) {
ASSERT_EQ(-1, fd_); // prevent accidental double-open
file_name_ = TempDir() + "/fdtest";
android::base::WriteStringToFile(contents, file_name_);
fd_ = open(file_name_.c_str(), O_RDONLY);
ASSERT_NE(-1, fd_);
fd_path_ = absl::StrCat("fd:///", fd_);
}
void CreateTempFdForTest() {
ASSERT_EQ(-1, fd_); // prevent accidental double-open
file_name_ = TempDir() + "/fdtest";
android::base::WriteStringToFile("", file_name_);
fd_ = open(file_name_.c_str(), O_WRONLY);
ASSERT_NE(-1, fd_);
fd_path_ = absl::StrCat("fd:///", fd_);
}
FileDescriptorFileSystem fd_fs_;
string fd_path_;
string file_name_;
private:
int fd_ = -1;
};
TEST_F(FileDescriptorFileSystemTest, WritableFile) {
CreateTempFdForTest();
std::unique_ptr<WritableFile> file;
TF_ASSERT_OK(fd_fs_.NewWritableFile(fd_path_, &file));
TF_ASSERT_OK(file->Append(kFileContent));
TF_ASSERT_OK(file->Close());
std::string actual_content;
ASSERT_TRUE(ReadFileToString(file_name_, &actual_content));
EXPECT_EQ(kFileContent, actual_content);
}
TEST_F(FileDescriptorFileSystemTest, WritableFileFailsOnInvalidFd) {
std::unique_ptr<WritableFile> file;
EXPECT_FALSE(fd_fs_.NewWritableFile(kBadFdPath, &file).ok());
}
TEST_F(FileDescriptorFileSystemTest, MalformedPathReturnsInvalidArgument) {
FileStatistics stats;
EXPECT_EQ(fd_fs_.Stat("fd://0", &stats).code(), error::INVALID_ARGUMENT);
EXPECT_EQ(fd_fs_.Stat("fd://authority/0", &stats).code(),
error::INVALID_ARGUMENT);
EXPECT_EQ(fd_fs_.Stat("fd:///not-a-number", &stats).code(),
error::INVALID_ARGUMENT);
}
TEST_F(FileDescriptorFileSystemTest, NewRandomAccessFile) {
CreateAndOpenFdForTest(kFileContent);
std::unique_ptr<RandomAccessFile> file;
TF_ASSERT_OK(fd_fs_.NewRandomAccessFile(fd_path_, &file));
StringPiece content;
char scratch[kFileContentLen];
TF_ASSERT_OK(file->Read(0, kFileContentLen, &content, scratch));
EXPECT_EQ(kFileContent, content);
}
TEST_F(FileDescriptorFileSystemTest,
NewRandomAccessFileFailsOnRequestMoreBytes) {
CreateAndOpenFdForTest(kFileContent);
std::unique_ptr<RandomAccessFile> file;
TF_ASSERT_OK(fd_fs_.NewRandomAccessFile(fd_path_, &file));
StringPiece content;
char scratch[kFileContentLen];
auto status = file->Read(0, kFileContentLen + 2, &content, scratch);
EXPECT_EQ(status.code(), error::OUT_OF_RANGE);
EXPECT_EQ(status.error_message(),
"Read fewer bytes than requested. Total read bytes 8");
}
TEST_F(FileDescriptorFileSystemTest, NewRandomAccessFileFailsOnInvalidFd) {
std::unique_ptr<RandomAccessFile> file;
EXPECT_FALSE(fd_fs_.NewRandomAccessFile(kBadFdPath, &file).ok());
}
TEST_F(FileDescriptorFileSystemTest, NewRandomAccessFileFailsOnDirectoryFd) {
int dir_fd = open(TempDir().c_str(), O_RDONLY | O_DIRECTORY);
ASSERT_NE(-1, dir_fd);
string dir_fd_path = absl::StrCat("fd:///", dir_fd);
std::unique_ptr<RandomAccessFile> file;
EXPECT_FALSE(fd_fs_.NewRandomAccessFile(dir_fd_path, &file).ok());
close(dir_fd);
}
TEST_F(FileDescriptorFileSystemTest, GetMatchingPaths) {
CreateAndOpenFdForTest(kFileContent);
std::vector<string> paths;
TF_EXPECT_OK(fd_fs_.GetMatchingPaths(fd_path_, &paths));
ASSERT_EQ(1, paths.size());
EXPECT_EQ(fd_path_, paths.at(0));
}
TEST_F(FileDescriptorFileSystemTest, GetMatchingPathsReturnsEmptyOnBadFd) {
std::vector<string> paths;
TF_EXPECT_OK(fd_fs_.GetMatchingPaths(kBadFdPath, &paths));
EXPECT_TRUE(paths.empty());
}
TEST_F(FileDescriptorFileSystemTest, Stat) {
CreateAndOpenFdForTest(kFileContent);
FileStatistics stats;
TF_EXPECT_OK(fd_fs_.Stat(fd_path_, &stats));
EXPECT_EQ(kFileContentLen, stats.length);
EXPECT_GT(stats.mtime_nsec, 0);
EXPECT_FALSE(stats.is_directory);
}
TEST_F(FileDescriptorFileSystemTest, StatFailsOnBadFd) {
FileStatistics stats;
EXPECT_FALSE(fd_fs_.Stat(kBadFdPath, &stats).ok());
}
TEST_F(FileDescriptorFileSystemTest, GetFileSize) {
CreateAndOpenFdForTest(kFileContent);
uint64 size;
TF_EXPECT_OK(fd_fs_.GetFileSize(fd_path_, &size));
EXPECT_EQ(kFileContentLen, size);
}
TEST_F(FileDescriptorFileSystemTest, GetFileSizeFailsOnBadFd) {
uint64 size;
EXPECT_FALSE(fd_fs_.GetFileSize(kBadFdPath, &size).ok());
}
TEST_F(FileDescriptorFileSystemTest,
NewReadOnlyMemoryRegionFromFileReturnsUnimplemented) {
std::unique_ptr<ReadOnlyMemoryRegion> region;
EXPECT_EQ(fd_fs_.NewReadOnlyMemoryRegionFromFile(kBadFdPath, ®ion).code(),
error::UNIMPLEMENTED);
}
TEST_F(FileDescriptorFileSystemTest, FileExistsReturnsUnimplemented) {
EXPECT_EQ(fd_fs_.FileExists(kBadFdPath).code(), error::UNIMPLEMENTED);
}
TEST_F(FileDescriptorFileSystemTest, GetChildrenReturnsUnimplemented) {
std::vector<string> paths;
EXPECT_EQ(fd_fs_.GetChildren(kBadFdPath, &paths).code(),
error::UNIMPLEMENTED);
}
} // anonymous namespace
} // namespace fcp
} // namespace tensorflow
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