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Add deterministic tests for the API of GWeakRef

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These don't address the thread-safety, but do address basic use.

https://bugzilla.gnome.org/show_bug.cgi?id=548954
This commit is contained in:
Simon McVittie 2011-12-08 17:35:19 +00:00 committed by Ryan Lortie
parent 46c2f570da
commit fa5ff39559
1 changed files with 101 additions and 0 deletions
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101
gobject/tests/reference.c
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@ -228,6 +228,106 @@ test_weak_pointer (void)
g_assert (weak2 == obj);
}
/* See gobject/tests/threadtests.c for the threaded version */
static void
test_weak_ref (void)
{
GObject *obj;
GObject *obj2;
GObject *tmp;
GWeakRef weak = { { GUINT_TO_POINTER (0xDEADBEEFU) } };
GWeakRef weak2 = { { GUINT_TO_POINTER (0xDEADBEEFU) } };
GWeakRef weak3 = { { GUINT_TO_POINTER (0xDEADBEEFU) } };
GWeakRef *dynamic_weak = g_new (GWeakRef, 1);
/* you can initialize to empty like this... */
g_weak_ref_init (&weak2, NULL);
g_assert (g_weak_ref_get (&weak2) == NULL);
/* ... or via an initializer */
g_weak_ref_init (&weak3, NULL);
g_assert (g_weak_ref_get (&weak3) == NULL);
obj = g_object_new (G_TYPE_OBJECT, NULL);
g_assert_cmpint (obj->ref_count, ==, 1);
obj2 = g_object_new (G_TYPE_OBJECT, NULL);
g_assert_cmpint (obj2->ref_count, ==, 1);
/* you can init with an object (even if uninitialized) */
g_weak_ref_init (&weak, obj);
g_weak_ref_init (dynamic_weak, obj);
/* or set to point at an object, if initialized (maybe to 0) */
g_weak_ref_set (&weak2, obj);
g_weak_ref_set (&weak3, obj);
/* none of this affects its refcount */
g_assert_cmpint (obj->ref_count, ==, 1);
/* getting the value takes a ref */
tmp = g_weak_ref_get (&weak);
g_assert (tmp == obj);
g_assert_cmpint (obj->ref_count, ==, 2);
g_object_unref (tmp);
g_assert_cmpint (obj->ref_count, ==, 1);
tmp = g_weak_ref_get (&weak2);
g_assert (tmp == obj);
g_assert_cmpint (obj->ref_count, ==, 2);
g_object_unref (tmp);
g_assert_cmpint (obj->ref_count, ==, 1);
tmp = g_weak_ref_get (&weak3);
g_assert (tmp == obj);
g_assert_cmpint (obj->ref_count, ==, 2);
g_object_unref (tmp);
g_assert_cmpint (obj->ref_count, ==, 1);
tmp = g_weak_ref_get (dynamic_weak);
g_assert (tmp == obj);
g_assert_cmpint (obj->ref_count, ==, 2);
g_object_unref (tmp);
g_assert_cmpint (obj->ref_count, ==, 1);
/* clearing a weak ref stops tracking */
g_weak_ref_clear (&weak);
/* setting a weak ref to NULL stops tracking too */
g_weak_ref_set (&weak2, NULL);
g_assert (g_weak_ref_get (&weak2) == NULL);
g_weak_ref_clear (&weak2);
/* setting a weak ref to a new object stops tracking the old one */
g_weak_ref_set (dynamic_weak, obj2);
tmp = g_weak_ref_get (dynamic_weak);
g_assert (tmp == obj2);
g_assert_cmpint (obj2->ref_count, ==, 2);
g_object_unref (tmp);
g_assert_cmpint (obj2->ref_count, ==, 1);
g_assert_cmpint (obj->ref_count, ==, 1);
/* free the object: weak3 is the only one left pointing there */
g_object_unref (obj);
g_assert (g_weak_ref_get (&weak3) == NULL);
/* setting a weak ref to a new object stops tracking the old one */
g_weak_ref_set (dynamic_weak, obj2);
tmp = g_weak_ref_get (dynamic_weak);
g_assert (tmp == obj2);
g_assert_cmpint (obj2->ref_count, ==, 2);
g_object_unref (tmp);
g_assert_cmpint (obj2->ref_count, ==, 1);
g_weak_ref_clear (&weak3);
/* clear and free dynamic_weak... */
g_weak_ref_clear (dynamic_weak);
/* ... to prove that doing so stops this from being a use-after-free */
g_object_unref (obj2);
g_free (dynamic_weak);
}
int
main (int argc, char **argv)
{
@ -244,6 +344,7 @@ main (int argc, char **argv)
g_test_add_func ("/object/value", test_object_value);
g_test_add_func ("/object/initially-unowned", test_initially_unowned);
g_test_add_func ("/object/weak-pointer", test_weak_pointer);
g_test_add_func ("/object/weak-ref", test_weak_ref);
return g_test_run ();
}