libc/test/integration/src/unistd/getcwd_test.cpp

   1 //===-- Unittests for getcwd ----------------------------------------------===//
   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/__support/CPP/string_view.h"
  10 #include "src/errno/libc_errno.h"
  11 #include "src/stdlib/getenv.h"
  12 #include "src/unistd/getcwd.h"
  13
  14 #include "test/IntegrationTest/test.h"
  15
  16 #include <stdlib.h> // For malloc and free
  17
  18 using LIBC_NAMESPACE::cpp::string_view;
  19
  20 TEST_MAIN(int argc, char **argv, char **envp) {
  21   char buffer[1024];
  22   ASSERT_TRUE(string_view(LIBC_NAMESPACE::getenv("PWD")) ==
  23               LIBC_NAMESPACE::getcwd(buffer, 1024));
  24
  25   // nullptr buffer
  26   char *cwd = LIBC_NAMESPACE::getcwd(nullptr, 0);
  27   ASSERT_TRUE(string_view(LIBC_NAMESPACE::getenv("PWD")) == cwd);
  28   free(cwd);
  29
  30   // Bad size
  31   cwd = LIBC_NAMESPACE::getcwd(buffer, 0);
  32   ASSERT_TRUE(cwd == nullptr);
  33   ASSERT_EQ(libc_errno, EINVAL);
  34   libc_errno = 0;
  35
  36   // Insufficient size
  37   cwd = LIBC_NAMESPACE::getcwd(buffer, 2);
  38   ASSERT_TRUE(cwd == nullptr);
  39   int err = libc_errno;
  40   ASSERT_EQ(err, ERANGE);
  41
  42   return 0;
  43 }