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 <fcntl.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 *TEST_DIR = "testdata";
  25   constexpr const char *TEST_FILE = "testdata/fchdir.test";
  26   constexpr const char *TEST_FILE_BASE = "fchdir.test";
  27   libc_errno = 0;
  28
  29   int dir_fd = LIBC_NAMESPACE::open(TEST_DIR, O_DIRECTORY);
  30   ASSERT_GT(dir_fd, 0);
  31   ASSERT_EQ(libc_errno, 0);
  32   int file_fd = LIBC_NAMESPACE::open(TEST_FILE, O_PATH);
  33   ASSERT_GT(file_fd, 0);
  34   ASSERT_EQ(libc_errno, 0);
  35   ASSERT_THAT(LIBC_NAMESPACE::close(file_fd), Succeeds(0));
  36
  37   ASSERT_THAT(LIBC_NAMESPACE::fchdir(dir_fd), Succeeds(0));
  38   file_fd = LIBC_NAMESPACE::open(TEST_FILE_BASE, O_PATH);
  39   ASSERT_GT(file_fd, 0);
  40   ASSERT_EQ(libc_errno, 0);
  41   ASSERT_THAT(LIBC_NAMESPACE::close(file_fd), Succeeds(0));
  42   ASSERT_THAT(LIBC_NAMESPACE::close(dir_fd), Succeeds(0));
  43 }
  44
  45 TEST(LlvmLibcChdirTest, ChangeToNonExistentDir) {
  46   using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
  47   libc_errno = 0;
  48   ASSERT_EQ(LIBC_NAMESPACE::fchdir(0), -1);
  49   ASSERT_NE(libc_errno, 0);
  50   libc_errno = 0;
  51 }