def test_generic_handler_chain_add_response_interceptors_to_empty_list(
self):
test_handler = mock.Mock()
test_handler_chain = GenericRequestHandlerChain(
request_handler=test_handler)
test_response_interceptor = mock.Mock()
test_handler_chain.add_response_interceptor(
interceptor=test_response_interceptor)
assert test_handler_chain.response_interceptors == [
test_response_interceptor
], ("Generic Request Handler Chain didn't add interceptor to list of "
"response interceptors when no "
"response interceptors are provided during instantiation")
def test_dispatch_raise_low_level_exception_when_no_suitable_exception_handler_registered(
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 = mock.MagicMock(spec=GenericHandlerAdapter)
test_adapter.supports.return_value = True
test_adapter.execute.side_effect = Exception(
"Test low level Exception")
test_exception_handler = mock.MagicMock(spec=AbstractExceptionHandler)
test_exception_handler.can_handle.return_value = False
test_exception_mapper = GenericExceptionMapper(
exception_handlers=[test_exception_handler])
self.test_dispatcher.request_mappers = [test_request_mapper]
self.test_dispatcher.handler_adapters = [test_adapter]
self.test_dispatcher.exception_mapper = test_exception_mapper
with self.assertRaises(Exception) as exc:
self.test_dispatcher.dispatch(
handler_input=self.valid_handler_input)
assert "Test low level Exception" in str(exc.exception), (
"Dispatcher didn't throw low level exception when request "
"dispatch throws exception and "
"no suitable exception handler is registered")
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_generic_handler_chain_add_response_interceptors_to_non_empty_list(
self):
test_handler = mock.Mock()
test_interceptor_1 = mock.MagicMock(spec=AbstractResponseInterceptor)
test_interceptors = [test_interceptor_1]
test_handler_chain = GenericRequestHandlerChain(
request_handler=test_handler,
response_interceptors=test_interceptors)
test_response_interceptor = mock.MagicMock(
spec=AbstractResponseInterceptor)
test_handler_chain.add_response_interceptor(
interceptor=test_response_interceptor)
assert test_handler_chain.response_interceptors == [
test_interceptor_1, test_response_interceptor
], ("Generic Request Handler Chain didn't add interceptor to list of "
"response interceptors when "
"response interceptors are provided during instantiation")
def test_generic_handler_chain_instantiate_response_interceptors(self):
test_handler = mock.Mock()
test_handler_chain = GenericRequestHandlerChain(
request_handler=test_handler)
assert test_handler_chain.response_interceptors == [], (
"Generic Request Handler Chain didn't instantiate empty list of "
"response interceptors when no "
"response interceptors are provided during instantiation")
def test_generic_handler_chain_instantiate_call_parent_instantiation(self):
test_handler = mock.Mock()
test_handler_chain = GenericRequestHandlerChain(
request_handler=test_handler)
assert (
test_handler_chain.request_interceptors == []
and test_handler_chain.response_interceptors == []
), ("Generic Request Handler Chain didn't call parent instantiation "
"method during init")
def test_generic_handler_chain_with_null_request_handler_throws_error(
self):
with self.assertRaises(DispatchException) as exc:
test_handler_chain = GenericRequestHandlerChain(
request_handler=None)
assert "No Request Handler provided" in str(exc.exception), (
"Generic Request Handler Chain didn't raise exception when no "
"request handler is provided during "
"instantiation")
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_generic_request_mapper_initialization_with_chain_containing_valid_type(
self):
test_request_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_request_handler)
test_request_mapper = GenericRequestMapper(
request_handler_chains=[test_request_handler_chain])
assert test_request_mapper.request_handler_chains == [
test_request_handler_chain
], ("Request Mapper initialization throws exception when a valid "
"Handler Chain is provided in the "
"handler chains list")
def test_get_handler_chain_registered_for_event_request(self):
test_handler_input = TestDispatchInput(request="test_input")
test_intent_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_intent_handler.can_handle.return_value = False
test_intent_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_intent_handler)
test_event_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_event_handler.can_handle.return_value = True
test_event_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_event_handler)
test_request_mapper = GenericRequestMapper(request_handler_chains=[
test_event_request_handler_chain, test_intent_request_handler_chain
])
assert test_request_mapper.get_request_handler_chain(
test_handler_input).request_handler == test_event_handler, (
"get_request_handler_chain in Request Mapper found incorrect "
"request handler chain for "
"intent request")
def test_add_request_handler_chain_for_valid_chain_type(self):
test_request_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_request_handler)
test_request_mapper = GenericRequestMapper(request_handler_chains=None)
test_request_mapper.add_request_handler_chain(
test_request_handler_chain)
assert test_request_mapper.request_handler_chains == [
test_request_handler_chain
], ("Generic Request Mapper throws exception when a valid Handler "
"Chain is provided in the "
"add_request_handler_chain method")
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 test_no_handler_registered_for_intent_request(self):
test_handler_input = TestDispatchInput(request="test_intent")
test_request_handler = mock.MagicMock(spec=AbstractRequestHandler)
test_request_handler.can_handle.return_value = False
test_request_handler_chain = GenericRequestHandlerChain(
request_handler=test_request_handler)
test_request_mapper = GenericRequestMapper(
request_handler_chains=[test_request_handler_chain])
assert test_request_mapper.get_request_handler_chain(
test_handler_input
) is None, (
"get_request_handler_chain in Request Mapper found an unsupported "
"request handler chain for "
"intent request")
def test_dispatch_process_handled_exception_when_suitable_exception_handler_registered(
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 = mock.MagicMock(spec=GenericHandlerAdapter)
test_adapter.supports.return_value = True
test_adapter.execute.side_effect = DispatchException(
"Custom dispatch exception")
test_exception_handler_1 = mock.MagicMock(
spec=AbstractExceptionHandler)
test_exception_handler_1.can_handle.return_value = False
test_exception_handler_2 = mock.MagicMock(
spec=AbstractExceptionHandler)
test_exception_handler_2.can_handle.return_value = True
test_exception_handler_2.handle.return_value = "Custom exception " \
"handler response"
options = RuntimeConfiguration(
request_mappers=[test_request_mapper],
handler_adapters=[test_adapter],
exception_mapper=GenericExceptionMapper(exception_handlers=[
test_exception_handler_1, test_exception_handler_2
]))
self.test_dispatcher = GenericRequestDispatcher(options=options)
assert self.test_dispatcher.dispatch(
handler_input=self.valid_handler_input
) == "Custom exception handler response", (
"Dispatcher didn't handle exception when a suitable exception handler is registered"
)
test_exception_handler_1.handle.assert_not_called(), (
"Incorrect Exception Handler called when handling custom "
"exception")
test_exception_handler_2.handle.assert_called_once(), (
"Suitable exception handler didn't handle custom exception")