/* Basic test for the TEST_COMPARE_BLOB macro.

   Copyright (C) 2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <string.h>

#include <support/check.h>

#include <support/capture_subprocess.h>

static void

subprocess (void *closure)

{

  /* These tests should fail.  They were chosen to cover differences

     in length (with the same contents), single-bit mismatches, and

     mismatching null pointers.  */

  TEST_COMPARE_BLOB ("", 0, "", 1);    /* Line 29.  */

  TEST_COMPARE_BLOB ("X", 1, "", 1);   /* Line 30.  */

  TEST_COMPARE_BLOB ("abcd", 3, "abcd", 4); /* Line 31.  */

  TEST_COMPARE_BLOB ("abcd", 4, "abcD", 4); /* Line 32.  */

  TEST_COMPARE_BLOB ("abcd", 4, NULL, 0); /* Line 33.  */

  TEST_COMPARE_BLOB (NULL, 0, "abcd", 4); /* Line 34.  */

}

/* Same contents, different addresses.  */

char buffer_abc_1[] = "abc";

char buffer_abc_2[] = "abc";

static int

do_test (void)

{

  /* This should succeed.  Even if the pointers and array contents are

     different, zero-length inputs are not different.  */

  TEST_COMPARE_BLOB ("", 0, "", 0);

  TEST_COMPARE_BLOB ("", 0, buffer_abc_1, 0);

  TEST_COMPARE_BLOB (buffer_abc_1, 0, "", 0);

  TEST_COMPARE_BLOB (NULL, 0, "", 0);

  TEST_COMPARE_BLOB ("", 0, NULL, 0);

  TEST_COMPARE_BLOB (NULL, 0, NULL, 0);

  /* Check equality of blobs containing a single NUL byte.  */

  TEST_COMPARE_BLOB ("", 1, "", 1);

  TEST_COMPARE_BLOB ("", 1, &buffer_abc_1[3], 1);

  /* Check equality of blobs of varying lengths.  */

  for (size_t i = 0; i <= sizeof (buffer_abc_1); ++i)

    TEST_COMPARE_BLOB (buffer_abc_1, i, buffer_abc_2, i);

  struct support_capture_subprocess proc = support_capture_subprocess

    (&subprocess, NULL);

  /* Discard the reported error.  */

  support_record_failure_reset ();

  puts ("info: *** subprocess output starts ***");

  fputs (proc.out.buffer, stdout);

  puts ("info: *** subprocess output ends ***");

  TEST_VERIFY

    (strcmp (proc.out.buffer,

"tst-test_compare_blob.c:29: error: blob comparison failed\n"

"  left length:  0 bytes (from 0)\n"

"  right length: 1 bytes (from 1)\n"

"  right (evaluated from \"\"):\n"

"      \"\\000\"\n"

"      00\n"

"tst-test_compare_blob.c:30: error: blob comparison failed\n"

"  blob length: 1 bytes\n"

"  left (evaluated from \"X\"):\n"

"      \"X\"\n"

"      58\n"

"  right (evaluated from \"\"):\n"

"      \"\\000\"\n"

"      00\n"

"tst-test_compare_blob.c:31: error: blob comparison failed\n"

"  left length:  3 bytes (from 3)\n"

"  right length: 4 bytes (from 4)\n"

"  left (evaluated from \"abcd\"):\n"

"      \"abc\"\n"

"      61 62 63\n"

"  right (evaluated from \"abcd\"):\n"

"      \"abcd\"\n"

"      61 62 63 64\n"

"tst-test_compare_blob.c:32: error: blob comparison failed\n"

"  blob length: 4 bytes\n"

"  left (evaluated from \"abcd\"):\n"

"      \"abcd\"\n"

"      61 62 63 64\n"

"  right (evaluated from \"abcD\"):\n"

"      \"abcD\"\n"

"      61 62 63 44\n"

"tst-test_compare_blob.c:33: error: blob comparison failed\n"

"  left length:  4 bytes (from 4)\n"

"  right length: 0 bytes (from 0)\n"

"  left (evaluated from \"abcd\"):\n"

"      \"abcd\"\n"

"      61 62 63 64\n"

"tst-test_compare_blob.c:34: error: blob comparison failed\n"

"  left length:  0 bytes (from 0)\n"

"  right length: 4 bytes (from 4)\n"

"  right (evaluated from \"abcd\"):\n"

"      \"abcd\"\n"

"      61 62 63 64\n"

             ) == 0);

  /* Check that there is no output on standard error.  */

  support_capture_subprocess_check (&proc, "TEST_COMPARE_BLOB",

                                    0, sc_allow_stdout);

  return 0;

}

#include <support/test-driver.c>