/* Copyright libuv contributors. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

#include "uv.h"

#include "task.h"

#include <string.h>

#define BUF_SIZE 10

TEST_IMPL(env_vars) {

  const char* name = "UV_TEST_FOO";

  char buf[BUF_SIZE];

  size_t size;

  int r;

  /* Reject invalid inputs when setting an environment variable */

  r = uv_os_setenv(NULL, "foo");

  ASSERT(r == UV_EINVAL);

  r = uv_os_setenv(name, NULL);

  ASSERT(r == UV_EINVAL);

  r = uv_os_setenv(NULL, NULL);

  ASSERT(r == UV_EINVAL);

  /* Reject invalid inputs when retrieving an environment variable */

  size = BUF_SIZE;

  r = uv_os_getenv(NULL, buf, &size);

  ASSERT(r == UV_EINVAL);

  r = uv_os_getenv(name, NULL, &size);

  ASSERT(r == UV_EINVAL);

  r = uv_os_getenv(name, buf, NULL);

  ASSERT(r == UV_EINVAL);

  size = 0;

  r = uv_os_getenv(name, buf, &size);

  ASSERT(r == UV_EINVAL);

  /* Reject invalid inputs when deleting an environment variable */

  r = uv_os_unsetenv(NULL);

  ASSERT(r == UV_EINVAL);

  /* Successfully set an environment variable */

  r = uv_os_setenv(name, "123456789");

  ASSERT(r == 0);

  /* Successfully read an environment variable */

  size = BUF_SIZE;

  buf[0] = '\0';

  r = uv_os_getenv(name, buf, &size);

  ASSERT(r == 0);

  ASSERT(strcmp(buf, "123456789") == 0);

  ASSERT(size == BUF_SIZE - 1);

  /* Return UV_ENOBUFS if the buffer cannot hold the environment variable */

  size = BUF_SIZE - 1;

  buf[0] = '\0';

  r = uv_os_getenv(name, buf, &size);

  ASSERT(r == UV_ENOBUFS);

  ASSERT(size == BUF_SIZE);

  /* Successfully delete an environment variable */

  r = uv_os_unsetenv(name);

  ASSERT(r == 0);

  /* Return UV_ENOENT retrieving an environment variable that does not exist */

  r = uv_os_getenv(name, buf, &size);

  ASSERT(r == UV_ENOENT);

  /* Successfully delete an environment variable that does not exist */

  r = uv_os_unsetenv(name);

  ASSERT(r == 0);

  return 0;

}