def test_dataReceived_unchanged(self):
"""
Don't pass data along if it's unchanged.
"""
store = InMemoryStore()
store.put(Data('ham', 'cake', '1', 'xxxx', 'value'))
fake = FakeReceiver([IData])
s = DataStorer(store)
ISource(s).subscribe(fake)
s.dataReceived(Data('ham', 'cake', '1', 'xxxx', 'value'))
self.assertEqual(fake.receive.call_count, 0, "Should not pass "
"along unchanged data")
def test_dataReceived(self):
"""
Should store the data, then pass it on, returning whatever the receiver
returns.
"""
store = InMemoryStore()
store_d = defer.Deferred()
store.put = create_autospec(store.put, return_value=store_d)
fake = FakeReceiver([IData])
s = DataStorer(store)
ISource(s).subscribe(fake)
data = Data('sam', 'cake', '1', 'xxxx', 'value')
result = s.dataReceived(data)
self.assertEqual(fake.receive.call_count, 0, "Should not have "
"passed the data on because it hasn't been stored yet")
store.put.assert_called_once_with(data)
self.assertFalse(result.called)
store_d.callback({'changed': True})
fake.receive.assert_called_once_with(data)
self.assertTrue(self.successResultOf(result), "Should return "
"whatever the other receiver returns")