2 This file is part of GNUnet
3 Copyright (C) 2012 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
16 * @file regex/test_regex_proofs.c
17 * @brief test for regex.c
18 * @author Maximilian Szengel
21 #include "regex_internal_lib.h"
22 #include "regex_test_lib.h"
23 #include "regex_internal.h"
27 * Test if the given regex's canonical regex is the same as this canonical
28 * regex's canonical regex. Confused? Ok, then: 1. construct a dfa A from the
29 * given 'regex' 2. get the canonical regex of dfa A 3. construct a dfa B from
30 * this canonical regex 3. compare the canonical regex of dfa A with the
31 * canonical regex of dfa B.
33 * @param regex regular expression used for this test (see above).
35 * @return 0 on success, 1 on failure
38 test_proof (const char *regex)
41 struct REGEX_INTERNAL_Automaton *dfa;
45 dfa = REGEX_INTERNAL_construct_dfa (regex, strlen (regex), 1);
46 GNUNET_assert (NULL != dfa);
47 c_rx1 = GNUNET_strdup (REGEX_INTERNAL_get_canonical_regex (dfa));
48 REGEX_INTERNAL_automaton_destroy (dfa);
49 dfa = REGEX_INTERNAL_construct_dfa (c_rx1, strlen (c_rx1), 1);
50 GNUNET_assert (NULL != dfa);
51 c_rx2 = REGEX_INTERNAL_get_canonical_regex (dfa);
53 error = (0 == strcmp (c_rx1, c_rx2)) ? 0 : 1;
57 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
58 "Comparing canonical regex of\n%s\nfailed:\n%s\nvs.\n%s\n",
63 REGEX_INTERNAL_automaton_destroy (dfa);
70 * Use 'test_proof' function to randomly test the canonical regexes of 'count'
71 * random expressions of length 'rx_length'.
73 * @param count number of random regular expressions to test.
74 * @param rx_length length of the random regular expressions.
76 * @return 0 on succes, number of failures otherwise.
79 test_proofs_random (unsigned int count, size_t rx_length)
83 unsigned int failures;
87 for (i = 0; i < count; i++)
89 rand_rx = REGEX_TEST_generate_random_regex (rx_length, NULL);
90 failures += test_proof (rand_rx);
91 GNUNET_free (rand_rx);
99 * Test a number of known examples of regexes for proper canonicalization.
101 * @return 0 on success, number of failures otherwise.
104 test_proofs_static ()
109 const char *regex[8] = {
116 "((a|b)c|(a|b)(d|(a|b)e))",
117 "((a|b)(c|d)|(a|b)(a|b)e)"
120 const char *canon_rx1;
121 const char *canon_rx2;
122 struct REGEX_INTERNAL_Automaton *dfa1;
123 struct REGEX_INTERNAL_Automaton *dfa2;
127 for (i = 0; i < 8; i += 2)
129 dfa1 = REGEX_INTERNAL_construct_dfa (regex[i], strlen (regex[i]), 1);
130 dfa2 = REGEX_INTERNAL_construct_dfa (regex[i + 1], strlen (regex[i + 1]), 1);
131 GNUNET_assert (NULL != dfa1);
132 GNUNET_assert (NULL != dfa2);
134 canon_rx1 = REGEX_INTERNAL_get_canonical_regex (dfa1);
135 canon_rx2 = REGEX_INTERNAL_get_canonical_regex (dfa2);
137 error += (0 == strcmp (canon_rx1, canon_rx2)) ? 0 : 1;
141 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
142 "Comparing canonical regex failed:\nrx1:\t%s\ncrx1:\t%s\nrx2:\t%s\ncrx2:\t%s\n",
143 regex[i], canon_rx1, regex[i + 1], canon_rx2);
146 REGEX_INTERNAL_automaton_destroy (dfa1);
147 REGEX_INTERNAL_automaton_destroy (dfa2);
155 main (int argc, char *argv[])
157 GNUNET_log_setup ("test-regex", "WARNING", NULL);
163 error += test_proofs_static ();
164 error += test_proofs_random (100, 30);