1 /* GLib testing framework examples and tests
2 * Copyright (C) 2009 Red Hat, Inc.
4 * This work is provided "as is"; redistribution and modification
5 * in whole or in part, in any medium, physical or electronic is
6 * permitted without restriction.
8 * This work is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * In no event shall the authors or contributors be liable for any
13 * direct, indirect, incidental, special, exemplary, or consequential
14 * damages (including, but not limited to, procurement of substitute
15 * goods or services; loss of use, data, or profits; or business
16 * interruption) however caused and on any theory of liability, whether
17 * in contract, strict liability, or tort (including negligence or
18 * otherwise) arising in any way out of the use of this software, even
19 * if advised of the possibility of such damage.
22 #include <glib/glib.h>
27 #define NUM_TRIALS 250000
33 /* There are 32 legitimate orderings; the result always has to start
34 * with either "fe" (usually) or "ef" (rarely). For the remaining
35 * letters, "cbda" is the most likely, with various other orders
36 * possible, down to "adbc" being the most improbable. However,
37 * almost all "fe" orderings are more likely than almost any "ef"
38 * orderings. The complete probability ordering, from most-likely
39 * to least-likely is something roughly like:
41 { "fecbda", 0.2468 * NUM_TRIALS, 0},
42 { "febcda", 0.1885 * NUM_TRIALS, 0},
43 { "fecdba", 0.1346 * NUM_TRIALS, 0},
44 { "fedcba", 0.0830 * NUM_TRIALS, 0},
45 { "febdca", 0.0706 * NUM_TRIALS, 0},
46 { "fedbca", 0.0571 * NUM_TRIALS, 0},
47 { "fecbad", 0.0496 * NUM_TRIALS, 0},
48 { "febcad", 0.0374 * NUM_TRIALS, 0},
49 { "fecabd", 0.0185 * NUM_TRIALS, 0},
50 { "fecdab", 0.0136 * NUM_TRIALS, 0},
51 { "fecadb", 0.0110 * NUM_TRIALS, 0},
52 { "febacd", 0.0108 * NUM_TRIALS, 0},
53 { "feacbd", 0.0096 * NUM_TRIALS, 0},
54 { "fedcab", 0.0083 * NUM_TRIALS, 0},
55 { "feabcd", 0.0073 * NUM_TRIALS, 0},
56 { "feacdb", 0.0058 * NUM_TRIALS, 0},
57 { "efcbda", 0.0049 * NUM_TRIALS, 0},
58 { "febdac", 0.0048 * NUM_TRIALS, 0},
59 { "febadc", 0.0043 * NUM_TRIALS, 0},
60 { "fedbac", 0.0038 * NUM_TRIALS, 0},
61 { "efbcda", 0.0038 * NUM_TRIALS, 0},
62 { "feadcb", 0.0036 * NUM_TRIALS, 0},
63 { "fedacb", 0.0035 * NUM_TRIALS, 0},
64 { "feabdc", 0.0029 * NUM_TRIALS, 0},
65 { "feadbc", 0.0026 * NUM_TRIALS, 0},
66 { "fedabc", 0.0026 * NUM_TRIALS, 0},
67 { "efcdba", 0.0026 * NUM_TRIALS, 0},
68 { "efdcba", 0.0017 * NUM_TRIALS, 0},
69 { "efbdca", 0.0014 * NUM_TRIALS, 0},
70 { "efdbca", 0.0011 * NUM_TRIALS, 0},
71 { "efcbad", 0.0010 * NUM_TRIALS, 0},
72 { "efbcad", 0.0008 * NUM_TRIALS, 0},
73 { "efcabd", 0.0004 * NUM_TRIALS, 0},
74 { "efcdab", 0.0003 * NUM_TRIALS, 0},
75 { "efcadb", 0.0002 * NUM_TRIALS, 0},
76 { "efbacd", 0.0002 * NUM_TRIALS, 0},
77 { "efacbd", 0.0002 * NUM_TRIALS, 0},
78 { "efdcab", 0.0002 * NUM_TRIALS, 0},
79 { "efabcd", 0.0002 * NUM_TRIALS, 0},
80 { "efacdb", 0.0001 * NUM_TRIALS, 0},
81 { "efbdac", 0.0001 * NUM_TRIALS, 0},
82 { "efadcb", 0.0001 * NUM_TRIALS, 0},
83 { "efdbac", 0.0001 * NUM_TRIALS, 0},
84 { "efbadc", 0.0001 * NUM_TRIALS, 0},
85 { "efdacb", 0.0001 * NUM_TRIALS, 0},
86 { "efabdc", 0.0001 * NUM_TRIALS, 0},
87 { "efadbc", 0.00005 * NUM_TRIALS, 0},
88 { "efdabc", 0.00005 * NUM_TRIALS, 0}
90 #define NUM_ORDERINGS G_N_ELEMENTS (ordering)
93 test_srv_target_ordering (void)
95 GList *targets, *sorted, *t;
101 /* name, port, priority, weight */
102 targets = g_list_append (targets, g_srv_target_new ("a", 0, 2, 0));
103 targets = g_list_append (targets, g_srv_target_new ("b", 0, 2, 10));
104 targets = g_list_append (targets, g_srv_target_new ("c", 0, 2, 15));
105 targets = g_list_append (targets, g_srv_target_new ("d", 0, 2, 5));
106 targets = g_list_append (targets, g_srv_target_new ("e", 0, 1, 0));
107 targets = g_list_append (targets, g_srv_target_new ("f", 0, 1, 50));
109 for (i = 0; i < NUM_TRIALS; i++)
111 g_random_set_seed (i);
113 sorted = g_srv_target_list_sort (g_list_copy (targets));
115 for (t = sorted, p = result; t; t = t->next)
116 *(p++) = *g_srv_target_get_hostname (t->data);
118 g_list_free (sorted);
120 for (o = 0; o < NUM_ORDERINGS; o++)
122 if (!strcmp (result, ordering[o].order))
129 /* Assert that @result matched one of the valid orderings */
130 if (o == NUM_ORDERINGS)
132 char *msg = g_strdup_printf ("result '%s' is invalid", result);
133 g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, msg);
137 /* Assert that each ordering appeared roughly the expected
140 for (o = 0; o < NUM_ORDERINGS; o++)
142 g_assert_cmpint (ordering[o].seen, >, ordering[o].expected / 2);
143 g_assert_cmpint (ordering[o].seen, <, ordering[o].expected * 2);
146 g_resolver_free_targets (targets);
150 main (int argc, char **argv)
153 g_test_init (&argc, &argv, NULL);
155 g_test_add_func ("/srvtarget/srv-target-ordering", test_srv_target_ordering);