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/* Basic test for the TEST_COMPARE_BLOB macro.
Copyright (C) 2018-2023 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
<https://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>
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