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