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/* Basic test for the TEST_COMPARE_STRING macro.
Copyright (C) 2018-2022 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_STRING ("", NULL); /* Line 29. */
TEST_COMPARE_STRING ("X", ""); /* Line 30. */
TEST_COMPARE_STRING (NULL, "X"); /* Line 31. */
TEST_COMPARE_STRING ("abcd", "abcD"); /* Line 32. */
TEST_COMPARE_STRING ("abcd", NULL); /* Line 33. */
TEST_COMPARE_STRING (NULL, "abcd"); /* 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_STRING (NULL, NULL);
TEST_COMPARE_STRING ("", "");
TEST_COMPARE_STRING (buffer_abc_1, buffer_abc_2);
TEST_COMPARE_STRING (buffer_abc_1, "abc");
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_string.c:29: error: string comparison failed\n"
" left string: 0 bytes\n"
" right string: NULL\n"
"tst-test_compare_string.c:30: error: string comparison failed\n"
" left string: 1 bytes\n"
" right string: 0 bytes\n"
" left (evaluated from \"X\"):\n"
" \"X\"\n"
" 58\n"
"tst-test_compare_string.c:31: error: string comparison failed\n"
" left string: NULL\n"
" right string: 1 bytes\n"
" right (evaluated from \"X\"):\n"
" \"X\"\n"
" 58\n"
"tst-test_compare_string.c:32: error: string comparison failed\n"
" string 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_string.c:33: error: string comparison failed\n"
" left string: 4 bytes\n"
" right string: NULL\n"
" left (evaluated from \"abcd\"):\n"
" \"abcd\"\n"
" 61 62 63 64\n"
"tst-test_compare_string.c:34: error: string comparison failed\n"
" left string: NULL\n"
" right string: 4 bytes\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_STRING",
0, sc_allow_stdout);
return 0;
}
#include <support/test-driver.c>
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