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Add tests for g_spaced_primes_closest

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This commit is contained in:
Matthias Clasen 2013-12-30 09:48:29 -05:00
parent 4989cb4dde
commit 32e0499c56
1 changed files with 46 additions and 0 deletions
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46
glib/tests/hash.c
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@ -1396,6 +1396,51 @@ test_set_to_strv (void)
g_strfreev (strv); g_strfreev (strv);
} }
static gboolean
is_prime (guint p)
{
guint i;
if (p % 2 == 0)
return FALSE;
i = 3;
while (TRUE)
{
if (i * i > p)
return TRUE;
if (p % i == 0)
return FALSE;
i += 2;
}
}
static void
test_primes (void)
{
guint p, q;
gdouble r, min, max;
max = 1.0;
min = 10.0;
q = 1;
while (1) {
p = q;
q = g_spaced_primes_closest (p);
g_assert (is_prime (q));
if (p == 1) continue;
if (q == p) break;
r = q / (gdouble) p;
min = MIN (min, r);
max = MAX (max, r);
};
g_assert_cmpfloat (1.3, <, min);
g_assert_cmpfloat (max, <, 2.0);
}
int int
main (int argc, char *argv[]) main (int argc, char *argv[])
{ {
@ -1427,6 +1472,7 @@ main (int argc, char *argv[])
g_test_add_func ("/hash/iter-replace", test_iter_replace); g_test_add_func ("/hash/iter-replace", test_iter_replace);
g_test_add_func ("/hash/set-insert-corruption", test_set_insert_corruption); g_test_add_func ("/hash/set-insert-corruption", test_set_insert_corruption);
g_test_add_func ("/hash/set-to-strv", test_set_to_strv); g_test_add_func ("/hash/set-to-strv", test_set_to_strv);
g_test_add_func ("/hash/primes", test_primes);
return g_test_run (); return g_test_run ();