class TestGenericHandlerAdapter(unittest.TestCase):
def setUp(self):
self.test_handler_adapter = GenericHandlerAdapter()
def test_adapter_supports_valid_handler(self):
test_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_handler.can_handle.return_value = True
assert self.test_handler_adapter.supports(test_handler), (
"Handler Adapter supports method returns False for supported "
"Request Handler implementation")
def test_adapter_doesnt_supports_invalid_handler(self):
test_handler = mock.Mock()
assert not self.test_handler_adapter.supports(test_handler), (
"Handler Adapter supports method returns True for unsupported "
"Request Handler implementation")
def test_adapter_executes_valid_handler(self):
test_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_handler.handle.return_value = "Test Response"
test_input = TestDispatchInput(request="test_input")
assert self.test_handler_adapter.execute(
handler=test_handler,
handler_input=test_input) == "Test Response", (
"Handler Adapter executes method returns unexpected response "
"output for supported Request Handler "
"implementation")
def test_handler_input_successful_global_request_interceptors_execution(
self):
test_request_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_request_handler.can_handle.return_value = True
test_request_handler.handle.return_value = "Test Response"
test_interceptor_1 = mock.MagicMock(spec=AbstractRequestInterceptor)
test_interceptor_2 = mock.MagicMock(spec=AbstractRequestInterceptor)
test_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_request_handler)
test_request_mapper = GenericRequestMapper(
request_handler_chains=[test_request_handler_chain])
test_adapter = GenericHandlerAdapter()
self.test_dispatcher.request_mappers = [test_request_mapper]
self.test_dispatcher.handler_adapters = [test_adapter]
self.test_dispatcher.request_interceptors = [
test_interceptor_1, test_interceptor_2
]
self.test_dispatcher.dispatch(handler_input=self.valid_handler_input)
test_interceptor_1.process.assert_called_once_with(
handler_input=self.valid_handler_input), (
"Dispatcher dispatch method didn't process global request "
"interceptors before calling dispatch request")
test_interceptor_2.process.assert_called_once_with(
handler_input=self.valid_handler_input), (
"Dispatcher dispatch method didn't process global request "
"interceptors before calling dispatch request")
def test_handler_input_successful_execution_with_supported_chain_and_supported_adapter(
self):
test_request_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_request_handler.can_handle.return_value = True
test_request_handler.handle.return_value = "Test Response"
test_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_request_handler)
test_request_mapper = GenericRequestMapper(
request_handler_chains=[test_request_handler_chain])
test_adapter = GenericHandlerAdapter()
self.test_dispatcher.request_mappers = [test_request_mapper]
self.test_dispatcher.handler_adapters = [test_adapter]
assert self.test_dispatcher.dispatch(
handler_input=self.valid_handler_input) == "Test Response", (
"Dispatcher dispatch method return invalid response when "
"supported handler chain and "
"supported handler adapter are found")
test_request_handler.handle.assert_called_once_with(
self.valid_handler_input), (
"Dispatcher dispatch method called handle on Request Handler "
"more than once")
def test_handler_input_unsuccessful_global_request_interceptors_execution(
self):
test_request_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_request_handler.can_handle.return_value = True
test_request_handler.handle.return_value = "Test Response"
test_request_interceptor_1 = mock.MagicMock(
spec=AbstractRequestInterceptor)
test_request_interceptor_1.process.side_effect = ValueError(
"Test exception")
test_request_interceptor_2 = mock.MagicMock(
spec=AbstractRequestInterceptor)
test_response_interceptor_1 = mock.MagicMock(
spec=AbstractResponseInterceptor)
test_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_request_handler)
test_request_mapper = GenericRequestMapper(
request_handler_chains=[test_request_handler_chain])
test_adapter = GenericHandlerAdapter()
self.test_dispatcher.request_mappers = [test_request_mapper]
self.test_dispatcher.handler_adapters = [test_adapter]
self.test_dispatcher.request_interceptors = [
test_request_interceptor_1, test_request_interceptor_2
]
self.test_dispatcher.response_interceptors = [
test_response_interceptor_1
]
with self.assertRaises(ValueError) as exc:
self.test_dispatcher.dispatch(
handler_input=self.valid_handler_input)
assert "Test exception" in str(exc.exception), (
"Dispatcher didn't throw exception raised by global request "
"interceptor")
test_request_interceptor_1.process.assert_called_once_with(
handler_input=self.valid_handler_input), (
"Dispatcher dispatch method didn't process global request "
"interceptors before calling dispatch request")
test_request_interceptor_2.process.assert_not_called(), (
"Dispatcher dispatch method processed remaining global "
"request interceptors when one of them threw "
"exception")
test_request_handler.assert_not_called(), (
"Dispatcher dispatch method processed request handler 'handle' "
"method when one of the global request "
"interceptors threw exception")
test_response_interceptor_1.process.assert_not_called(), (
"Dispatcher dispatch method processed global response "
"interceptors when one of the global request "
"interceptors threw exception")
def test_handler_input_successful_global_response_interceptors_execution(
self):
test_request_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_request_handler.can_handle.return_value = True
test_response = mock.MagicMock(spec=TestDispatchOutput)
test_response_before_interceptor = test_response
test_request_handler.handle.return_value = test_response
test_interceptor_1 = mock.MagicMock(spec=AbstractResponseInterceptor)
test_response.interceptor = "Interceptor 1"
test_response_from_interceptor_1 = test_response
test_interceptor_1.process.return_value = test_response
test_interceptor_2 = mock.MagicMock(spec=AbstractResponseInterceptor)
test_response.interceptor = "Interceptor 2"
test_response_from_interceptor_2 = test_response
test_interceptor_2.process.return_value = test_response
test_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_request_handler)
test_request_mapper = GenericRequestMapper(
request_handler_chains=[test_request_handler_chain])
test_adapter = GenericHandlerAdapter()
self.test_dispatcher.request_mappers = [test_request_mapper]
self.test_dispatcher.handler_adapters = [test_adapter]
self.test_dispatcher.response_interceptors = [
test_interceptor_1, test_interceptor_2
]
assert self.test_dispatcher.dispatch(
handler_input=self.valid_handler_input
) == test_response_from_interceptor_2, (
"Dispatcher dispatch method returned invalid response after "
"processing response through "
"global response interceptors")
test_interceptor_1.process.assert_called_once_with(
handler_input=self.valid_handler_input,
response=test_response_before_interceptor), (
"Dispatcher dispatch method didn't process global request "
"interceptors after calling dispatch request")
test_interceptor_2.process.assert_called_once_with(
handler_input=self.valid_handler_input,
response=test_response_from_interceptor_1), (
"Dispatcher dispatch method didn't process global request "
"interceptors after calling dispatch request")
def setUp(self):
self.test_handler_adapter = GenericHandlerAdapter()