//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Unittests for fstatfs.
///
//===----------------------------------------------------------------------===//

#include "hdr/fcntl_macros.h"
#include "hdr/sys_stat_macros.h"
#include "src/__support/libc_errno.h"
#include "src/__support/macros/config.h"
#include "src/fcntl/open.h"
#include "src/sys/stat/mkdirat.h"
#include "src/sys/statfs/fstatfs.h"
#include "src/unistd/close.h"
#include "src/unistd/rmdir.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"

using namespace LIBC_NAMESPACE::testing::ErrnoSetterMatcher;
using LlvmLibcSysFStatfsTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;

TEST_F(LlvmLibcSysFStatfsTest, FStatfsBasic) {
  struct statfs buf;

  int fd = LIBC_NAMESPACE::open("/", O_PATH);
  ASSERT_ERRNO_SUCCESS();
  ASSERT_GT(fd, 0);

  // The root of the file directory must always exist
  ASSERT_THAT(LIBC_NAMESPACE::fstatfs(fd, &buf), Succeeds());
  ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
}

TEST_F(LlvmLibcSysFStatfsTest, FStatfsInvalidPath) {
  struct statfs buf;

  constexpr const char *FILENAME = "fstatfs.testdir";
  auto TEST_DIR = libc_make_test_file_path(FILENAME);

  // Always delete the folder so that we start in a consistent state.
  LIBC_NAMESPACE::rmdir(TEST_DIR);
  libc_errno = 0; // Reset errno

  ASSERT_THAT(LIBC_NAMESPACE::mkdirat(AT_FDCWD, TEST_DIR, S_IRWXU),
              Succeeds(0));

  int fd = LIBC_NAMESPACE::open(TEST_DIR, O_PATH);
  ASSERT_ERRNO_SUCCESS();
  ASSERT_GT(fd, 0);

  ASSERT_THAT(LIBC_NAMESPACE::fstatfs(fd, &buf), Succeeds());
  ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));

  ASSERT_THAT(LIBC_NAMESPACE::rmdir(TEST_DIR), Succeeds(0));

  ASSERT_THAT(LIBC_NAMESPACE::fstatfs(fd, &buf), Fails(EBADF));
}