def test_starting_patcher_already_started_raises(self):
domain = get_domain()
patcher = wrap_port(domain, port_name='c')
patcher.start()
with self.assertRaisesRegexp(RuntimeError, 'patch already started'):
patcher.start()
def test_stopping_patcher_twice_raises(self):
domain = get_domain()
patcher = wrap_port(domain, port_name='c')
patcher.start()
patcher.stop()
with self.assertRaisesRegexp(RuntimeError, 'patcher not yet started'):
patcher.stop()
def test_wrap_port_as_context_manager(self):
domain = get_domain()
with wrap_port(component=domain, port_name='b') as wrapped_b:
self.assertEqual(9 * 10 + 5, domain.a(9)) # should call through to actual port
wrapped_b.assert_called_once_with(value=9) # mock object can be used to assert calls
# patch removed outside of context manager and calls no longer intercepted
wrapped_b.reset_mock()
self.assertEqual(9 * 10 + 5, domain.a(9))
wrapped_b.assert_not_called()
def test_wrap_port_with_manual_start_stop(self):
domain = get_domain()
patcher = wrap_port(component=domain, port_name='b')
wrapped_b = patcher.start()
self.assertEqual(9 * 10 + 5, domain.a(9)) # should call through to actual port
wrapped_b.assert_called_once_with(value=9) # mock object can be used to assert calls
patcher.stop()
# once stopped, calls no longer intercepted
wrapped_b.reset_mock()
self.assertEqual(9 * 10 + 5, domain.a(9))
wrapped_b.assert_not_called()
def test_patch_port_affects_all_consumers_of_a_port(self):
domain = get_domain()
with wrap_port(component=domain, port_name='b') as wrapped_b:
self.assertEqual(9 * 10 + 5, domain.a(9))
self.assertEqual(2 * 9 * 10 + 5, domain.e(9))
wrapped_b.assert_has_calls([mock.call(value=9), mock.call(value=2 * 9)], any_order=False)
# patch removed outside of context manager and calls no longer intercepted
wrapped_b.reset_mock()
self.assertEqual(9 * 10 + 5, domain.a(9))
self.assertEqual(2 * 9 * 10 + 5, domain.e(9))
wrapped_b.assert_not_called()
def test_wrap_port_with_disconnected_port_raises(self):
domain = get_domain()
domain2 = domain.__class__() # get new instance of domain where 'c' port is not yet connected
with self.assertRaisesRegexp(DisconnectedPort, 'B.c is disconnected'):
wrap_port(domain2, port_name='c')
def test_wrap_port_with_unknown_port_raises(self):
domain = get_domain()
with self.assertRaisesRegexp(UnknownPort, 'Could not find instances of port "unknown_port"'):
wrap_port(domain, port_name='unknown_port')