2 This file is part of GNUnet
3 (C) 2012 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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21 * @file regex/test_regex_proofs.c
22 * @brief test for regex.c
23 * @author Maximilian Szengel
26 #include "gnunet_regex_lib.h"
27 #include "regex_internal.h"
31 * Test if the given regex's canonical regex is the same as this canonical
32 * regex's canonical regex. Confused? Ok, then: 1. construct a dfa A from the
33 * given 'regex' 2. get the canonical regex of dfa A 3. construct a dfa B from
34 * this canonical regex 3. compare the canonical regex of dfa A with the
35 * canonical regex of dfa B.
37 * @param regex regular expression used for this test (see above).
39 * @return 0 on success, 1 on failure
42 test_proof (const char *regex)
45 struct GNUNET_REGEX_Automaton *dfa;
49 dfa = GNUNET_REGEX_construct_dfa (regex, strlen (regex));
50 c_rx1 = GNUNET_strdup (GNUNET_REGEX_get_canonical_regex (dfa));
51 GNUNET_REGEX_automaton_destroy (dfa);
52 dfa = GNUNET_REGEX_construct_dfa (c_rx1, strlen (c_rx1));
53 c_rx2 = GNUNET_REGEX_get_canonical_regex (dfa);
55 error = (0 == strcmp (c_rx1, c_rx2)) ? 0 : 1;
59 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
60 "Comparing canonical regex of\n%s\nfailed:\n%s\nvs.\n%s\n",
65 GNUNET_REGEX_automaton_destroy (dfa);
71 * Use 'test_proof' function to randomly test the canonical regexes of 'count'
72 * random expressions of length 'rx_length'.
74 * @param count number of random regular expressions to test.
75 * @param rx_length length of the random regular expressions.
77 * @return 0 on succes, number of failures otherwise.
80 test_proofs_random (unsigned int count, size_t rx_length)
84 unsigned int failures;
88 for (i = 0; i < count; i++)
90 rand_rx = GNUNET_REGEX_generate_random_regex (rx_length, NULL);
91 failures += test_proof (rand_rx);
92 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 (void)
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 GNUNET_REGEX_Automaton *dfa1;
123 struct GNUNET_REGEX_Automaton *dfa2;
127 for (i = 0; i < 8; i += 2)
129 dfa1 = GNUNET_REGEX_construct_dfa (regex[i], strlen (regex[i]));
130 dfa2 = GNUNET_REGEX_construct_dfa (regex[i + 1], strlen (regex[i + 1]));
132 canon_rx1 = GNUNET_REGEX_get_canonical_regex (dfa1);
133 canon_rx2 = GNUNET_REGEX_get_canonical_regex (dfa2);
135 error += (0 == strcmp (canon_rx1, canon_rx2)) ? 0 : 1;
139 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
140 "Comparing canonical regex failed:\nrx1:\t%s\ncrx1:\t%s\nrx2:\t%s\ncrx2:\t%s\n",
141 regex[i], canon_rx1, regex[i + 1], canon_rx2);
144 GNUNET_REGEX_automaton_destroy (dfa1);
145 GNUNET_REGEX_automaton_destroy (dfa2);
153 main (int argc, char *argv[])
155 GNUNET_log_setup ("test-regex",
167 error += test_proofs_static ();
168 error += test_proofs_random (100, 30);