1/* Basic test for the TEST_COMPARE_BLOB macro.
2 Copyright (C) 2018-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <string.h>
20#include <support/check.h>
21#include <support/capture_subprocess.h>
22
23static void
24subprocess (void *closure)
25{
26 /* These tests should fail. They were chosen to cover differences
27 in length (with the same contents), single-bit mismatches, and
28 mismatching null pointers. */
29 TEST_COMPARE_BLOB ("", 0, "", 1); /* Line 29. */
30 TEST_COMPARE_BLOB ("X", 1, "", 1); /* Line 30. */
31 TEST_COMPARE_BLOB ("abcd", 3, "abcd", 4); /* Line 31. */
32 TEST_COMPARE_BLOB ("abcd", 4, "abcD", 4); /* Line 32. */
33 TEST_COMPARE_BLOB ("abcd", 4, NULL, 0); /* Line 33. */
34 TEST_COMPARE_BLOB (NULL, 0, "abcd", 4); /* Line 34. */
35}
36
37/* Same contents, different addresses. */
38char buffer_abc_1[] = "abc";
39char buffer_abc_2[] = "abc";
40
41static int
42do_test (void)
43{
44 /* This should succeed. Even if the pointers and array contents are
45 different, zero-length inputs are not different. */
46 TEST_COMPARE_BLOB ("", 0, "", 0);
47 TEST_COMPARE_BLOB ("", 0, buffer_abc_1, 0);
48 TEST_COMPARE_BLOB (buffer_abc_1, 0, "", 0);
49 TEST_COMPARE_BLOB (NULL, 0, "", 0);
50 TEST_COMPARE_BLOB ("", 0, NULL, 0);
51 TEST_COMPARE_BLOB (NULL, 0, NULL, 0);
52
53 /* Check equality of blobs containing a single NUL byte. */
54 TEST_COMPARE_BLOB ("", 1, "", 1);
55 TEST_COMPARE_BLOB ("", 1, &buffer_abc_1[3], 1);
56
57 /* Check equality of blobs of varying lengths. */
58 for (size_t i = 0; i <= sizeof (buffer_abc_1); ++i)
59 TEST_COMPARE_BLOB (buffer_abc_1, i, buffer_abc_2, i);
60
61 struct support_capture_subprocess proc = support_capture_subprocess
62 (callback: &subprocess, NULL);
63
64 /* Discard the reported error. */
65 support_record_failure_reset ();
66
67 puts (s: "info: *** subprocess output starts ***");
68 fputs (s: proc.out.buffer, stdout);
69 puts (s: "info: *** subprocess output ends ***");
70
71 TEST_VERIFY
72 (strcmp (proc.out.buffer,
73"tst-test_compare_blob.c:29: error: blob comparison failed\n"
74" left length: 0 bytes (from 0)\n"
75" right length: 1 bytes (from 1)\n"
76" right (evaluated from \"\"):\n"
77" \"\\000\"\n"
78" 00\n"
79"tst-test_compare_blob.c:30: error: blob comparison failed\n"
80" blob length: 1 bytes\n"
81" left (evaluated from \"X\"):\n"
82" \"X\"\n"
83" 58\n"
84" right (evaluated from \"\"):\n"
85" \"\\000\"\n"
86" 00\n"
87"tst-test_compare_blob.c:31: error: blob comparison failed\n"
88" left length: 3 bytes (from 3)\n"
89" right length: 4 bytes (from 4)\n"
90" left (evaluated from \"abcd\"):\n"
91" \"abc\"\n"
92" 61 62 63\n"
93" right (evaluated from \"abcd\"):\n"
94" \"abcd\"\n"
95" 61 62 63 64\n"
96"tst-test_compare_blob.c:32: error: blob comparison failed\n"
97" blob length: 4 bytes\n"
98" left (evaluated from \"abcd\"):\n"
99" \"abcd\"\n"
100" 61 62 63 64\n"
101" right (evaluated from \"abcD\"):\n"
102" \"abcD\"\n"
103" 61 62 63 44\n"
104"tst-test_compare_blob.c:33: error: blob comparison failed\n"
105" left length: 4 bytes (from 4)\n"
106" right length: 0 bytes (from 0)\n"
107" left (evaluated from \"abcd\"):\n"
108" \"abcd\"\n"
109" 61 62 63 64\n"
110"tst-test_compare_blob.c:34: error: blob comparison failed\n"
111" left length: 0 bytes (from 0)\n"
112" right length: 4 bytes (from 4)\n"
113" right (evaluated from \"abcd\"):\n"
114" \"abcd\"\n"
115" 61 62 63 64\n"
116 ) == 0);
117
118 /* Check that there is no output on standard error. */
119 support_capture_subprocess_check (&proc, context: "TEST_COMPARE_BLOB",
120 status_or_signal: 0, allowed: sc_allow_stdout);
121
122 return 0;
123}
124
125#include <support/test-driver.c>
126

source code of glibc/support/tst-test_compare_blob.c