libc/test/src/unistd/isatty_test.cpp

   1 //===-- Unittests for isatty ----------------------------------------------===//
   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/isatty.h"
  13 #include "test/UnitTest/ErrnoSetterMatcher.h"
  14 #include "test/UnitTest/Test.h"
  15
  16 #include <sys/stat.h>
  17
  18 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
  19 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
  20
  21 TEST(LlvmLibcIsATTYTest, StdInOutTests) {
  22   // If stdin is connected to a terminal, assume that all of the standard i/o
  23   // fds are.
  24   LIBC_NAMESPACE::libc_errno = 0;
  25   if (LIBC_NAMESPACE::isatty(0)) {
  26     EXPECT_THAT(LIBC_NAMESPACE::isatty(0), Succeeds(1)); // stdin
  27     EXPECT_THAT(LIBC_NAMESPACE::isatty(1), Succeeds(1)); // stdout
  28     EXPECT_THAT(LIBC_NAMESPACE::isatty(2), Succeeds(1)); // stderr
  29   } else {
  30     EXPECT_THAT(LIBC_NAMESPACE::isatty(0), Fails(ENOTTY, 0)); // stdin
  31     EXPECT_THAT(LIBC_NAMESPACE::isatty(1), Fails(ENOTTY, 0)); // stdout
  32     EXPECT_THAT(LIBC_NAMESPACE::isatty(2), Fails(ENOTTY, 0)); // stderr
  33   }
  34 }
  35
  36 TEST(LlvmLibcIsATTYTest, BadFdTest) {
  37   LIBC_NAMESPACE::libc_errno = 0;
  38   EXPECT_THAT(LIBC_NAMESPACE::isatty(-1), Fails(EBADF, 0)); // invalid fd
  39 }
  40
  41 TEST(LlvmLibcIsATTYTest, DevTTYTest) {
  42   constexpr const char *FILENAME = "/dev/tty";
  43   auto TTY_FILE = libc_make_test_file_path(FILENAME);
  44   LIBC_NAMESPACE::libc_errno = 0;
  45   int fd = LIBC_NAMESPACE::open(TTY_FILE, O_RDONLY);
  46   if (fd > 0) {
  47     ASSERT_ERRNO_SUCCESS();
  48     EXPECT_THAT(LIBC_NAMESPACE::isatty(fd), Succeeds(1));
  49     ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
  50   }
  51 }
  52
  53 TEST(LlvmLibcIsATTYTest, FileTest) {
  54   constexpr const char *FILENAME = "isatty.test";
  55   auto TEST_FILE = libc_make_test_file_path(FILENAME);
  56   LIBC_NAMESPACE::libc_errno = 0;
  57   int fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);
  58   ASSERT_ERRNO_SUCCESS();
  59   ASSERT_GT(fd, 0);
  60   EXPECT_THAT(LIBC_NAMESPACE::isatty(fd), Fails(ENOTTY, 0));
  61   ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
  62 }