libc/test/src/unistd/fchdir_test.cpp

   1 //===-- Unittests for fchdir ----------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/errno/libc_errno.h"
  10 #include "src/fcntl/open.h"
  11 #include "src/unistd/close.h"
  12 #include "src/unistd/fchdir.h"
  13 #include "test/UnitTest/ErrnoSetterMatcher.h"
  14 #include "test/UnitTest/Test.h"
  15
  16 #include "hdr/fcntl_macros.h"
  17
  18 TEST(LlvmLibcChdirTest, ChangeAndOpen) {
  19   // The idea of this test is that we will first open an existing test file
  20   // without changing the directory to make sure it exists. Next, we change
  21   // directory and open the same file to make sure that the "fchdir" operation
  22   // succeeded.
  23   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
  24   constexpr const char *FILENAME = "testdata";
  25   auto TEST_DIR = libc_make_test_file_path(FILENAME);
  26   constexpr const char *FILENAME2 = "testdata/fchdir.test";
  27   auto TEST_FILE = libc_make_test_file_path(FILENAME2);
  28   constexpr const char *FILENAME3 = "fchdir.test";
  29   auto TEST_FILE_BASE = libc_make_test_file_path(FILENAME3);
  30   LIBC_NAMESPACE::libc_errno = 0;
  31
  32   int dir_fd = LIBC_NAMESPACE::open(TEST_DIR, O_DIRECTORY);
  33   ASSERT_GT(dir_fd, 0);
  34   ASSERT_ERRNO_SUCCESS();
  35   int file_fd = LIBC_NAMESPACE::open(TEST_FILE, O_PATH);
  36   ASSERT_GT(file_fd, 0);
  37   ASSERT_ERRNO_SUCCESS();
  38   ASSERT_THAT(LIBC_NAMESPACE::close(file_fd), Succeeds(0));
  39
  40   ASSERT_THAT(LIBC_NAMESPACE::fchdir(dir_fd), Succeeds(0));
  41   file_fd = LIBC_NAMESPACE::open(TEST_FILE_BASE, O_PATH);
  42   ASSERT_GT(file_fd, 0);
  43   ASSERT_ERRNO_SUCCESS();
  44   ASSERT_THAT(LIBC_NAMESPACE::close(file_fd), Succeeds(0));
  45   ASSERT_THAT(LIBC_NAMESPACE::close(dir_fd), Succeeds(0));
  46 }
  47
  48 TEST(LlvmLibcChdirTest, ChangeToNonExistentDir) {
  49   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
  50   LIBC_NAMESPACE::libc_errno = 0;
  51   ASSERT_EQ(LIBC_NAMESPACE::fchdir(0), -1);
  52   ASSERT_ERRNO_FAILURE();
  53   LIBC_NAMESPACE::libc_errno = 0;
  54 }