def test_backend(self):
b = DatabaseBackend()
tid = gen_unique_id()
self.assertFalse(b.is_successful(tid))
self.assertEquals(b.get_status(tid), states.PENDING)
self.assertTrue(b.get_result(tid) is None)
b.mark_as_done(tid, 42)
self.assertTrue(b.is_successful(tid))
self.assertEquals(b.get_status(tid), states.SUCCESS)
self.assertEquals(b.get_result(tid), 42)
self.assertTrue(b._cache.get(tid))
self.assertTrue(b.get_result(tid), 42)
tid2 = gen_unique_id()
result = {"foo": "baz", "bar": SomeClass(12345)}
b.mark_as_done(tid2, result)
# is serialized properly.
rindb = b.get_result(tid2)
self.assertEquals(rindb.get("foo"), "baz")
self.assertEquals(rindb.get("bar").data, 12345)
tid3 = gen_unique_id()
try:
raise KeyError("foo")
except KeyError, exception:
pass
