def test_garbage_collection_precondition(self):
pc = PhysicsCache()
pc.acquire(1)
pc.release(1)
pc.acquire(2)
pc.release(2)
# verify that game_loop_finish does not permit collection by itself,
# but does in conjunction with graphics_loop_finish
pc.game_loop_finish(0)
pc._garbage_collect()
self.assertEqual(pc.count, 3)
self.assertEqual(pc.latest, 2)
self.assertTrue(pc.has(0))
pc.graphics_loop_finish(0)
pc._garbage_collect()
self.assertEqual(pc.count, 2)
self.assertEqual(pc.latest, 2)
self.assertTrue(not pc.has(0))
# verify that graphics_loop_finish does not permit collection by
# itself, but does in conjunction with game_loop_finish
pc.graphics_loop_finish(1)
pc._garbage_collect()
self.assertEqual(pc.count, 2)
self.assertEqual(pc.latest, 2)
self.assertTrue(pc.has(1))
pc.game_loop_finish(1)
pc._garbage_collect()
self.assertEqual(pc.count, 1)
self.assertEqual(pc.latest, 2)
self.assertTrue(not pc.has(1))
def test_garbage_collection_protects_latest(self):
pc = PhysicsCache()
pc.acquire(1)
pc.release(1)
# verify that the latest snapshot will not permit itself to be deleted
pc.graphics_loop_finish(1)
pc.game_loop_finish(1)
pc._garbage_collect(2)
self.assertTrue(pc.has(1))
def test_garbage_collection_cascade(self):
pc = PhysicsCache()
pc.acquire(1)
pc.release(1)
pc.acquire(2)
pc.release(2)
# verify that a snapshot that's okay_to_delete also causes earlier
# snapshots to be okay_to_delete
pc.graphics_loop_finish(1)
pc.game_loop_finish(1)
pc._garbage_collect(2)
self.assertEqual(pc.count, 1)
self.assertEqual(pc.latest, 2)
self.assertTrue(not pc.has(0))
self.assertTrue(not pc.has(1))
self.assertTrue(pc.has(2))