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https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-22 07:01:33 +00:00
Improve EventHandlerFactoryBase
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@ -4,25 +4,34 @@ from .event_handler import EventHandler
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class EventHandlerFactoryBase:
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def build(self, event_handler, *, keys=None):
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analyzer = EventHandlerAnalyzer(event_handler, keys)
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event_handler = self._build_from_callable(analyzer)
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event_handler.start()
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return event_handler
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def _build_from_callable(self, analyzer):
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def build(self, event_handler, *, keys=None, event_handler_type=EventHandler):
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builder = EventHandlerBuilder(event_handler, keys, event_handler_type)
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server_connector = self._build_server_connector()
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server_connector.subscribe(analyzer.keys)
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event_handler = EventHandler(server_connector)
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event_handler.handle_event = analyzer.handle_event
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real_event_handler = builder.build(server_connector)
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event_handler.server_connector = server_connector
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with suppress(AttributeError):
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event_handler.cleanup = analyzer.cleanup
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return event_handler
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event_handler.start()
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real_event_handler.start()
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return real_event_handler
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def _build_server_connector(self):
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raise NotImplementedError()
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class EventHandlerBuilder:
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def __init__(self, event_handler, supplied_keys, event_handler_type):
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self._analyzer = EventHandlerAnalyzer(event_handler, supplied_keys)
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self._event_handler_type = event_handler_type
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def build(self, server_connector):
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server_connector.subscribe(*self._analyzer.keys)
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event_handler = self._event_handler_type(server_connector)
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event_handler.handle_event = self._analyzer.handle_event
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with suppress(AttributeError):
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event_handler.cleanup = self._analyzer.cleanup
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return event_handler
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class EventHandlerAnalyzer:
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def __init__(self, event_handler, supplied_keys):
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self._event_handler = event_handler
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@ -1,4 +1,4 @@
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# pylint: disable=redefined-outer-name
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# pylint: disable=redefined-outer-name,attribute-defined-outside-init
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from secrets import token_urlsafe
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from random import randint
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@ -18,16 +18,16 @@ class MockServerConnector:
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self.keys = []
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self._on_message = None
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def register_callback(self, callback):
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self._on_message = callback
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def simulate_message(self, message):
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self._on_message(message)
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def subscribe(self, keys):
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def register_callback(self, callback):
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self._on_message = callback
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def subscribe(self, *keys):
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self.keys.extend(keys)
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def unsubscribe(self, keys):
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def unsubscribe(self, *keys):
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for key in keys:
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self.keys.remove(key)
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@ -38,17 +38,31 @@ class MockServerConnector:
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pass
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class MockEventHandler:
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class MockEventHandlerStub:
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def __init__(self):
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self.server_connector = None
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self.last_message = None
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self.cleaned_up = False
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self.started = False
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def handle_event(self, message, server_connector):
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pass
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def start(self):
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self.started = True
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def cleanup(self):
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self.cleaned_up = True
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class MockEventHandler(MockEventHandlerStub):
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# pylint: disable=unused-argument
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def handle_event(self, message, server_connector):
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self.last_message = message
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class MockCallable(MockEventHandlerStub):
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def __call__(self, message, server_connector):
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self.last_message = message
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@pytest.fixture
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def test_msg():
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yield token_urlsafe(randint(16, 64))
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@ -63,12 +77,16 @@ def test_keys():
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def test_build_from_object(test_keys, test_msg):
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mock_eh = MockEventHandler()
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def test_handle_event(message, server_connector):
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mock_eh = MockEventHandlerStub()
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def handle_event(message, server_connector):
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raise RuntimeError(message, server_connector.keys)
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mock_eh.handle_event = test_handle_event
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mock_eh.handle_event = handle_event
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assert not mock_eh.started
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eh = MockEventHandlerFactory().build(mock_eh, keys=test_keys)
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assert mock_eh.started
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assert mock_eh.server_connector is eh.server_connector
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with pytest.raises(RuntimeError) as err:
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eh.server_connector.simulate_message(test_msg)
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msg, keys = err.args
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@ -79,34 +97,52 @@ def test_build_from_object(test_keys, test_msg):
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assert mock_eh.cleaned_up
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def test_build_from_object_with_keys(test_keys):
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def test_build_from_object_with_keys(test_keys, test_msg):
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mock_eh = MockEventHandler()
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mock_eh.keys = test_keys # pylint: disable=attribute-defined-outside-init
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mock_eh.keys = test_keys
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assert not mock_eh.started
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eh = MockEventHandlerFactory().build(mock_eh)
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assert mock_eh.server_connector.keys == test_keys
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assert eh.server_connector is mock_eh.server_connector
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assert mock_eh.started
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assert not mock_eh.last_message
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eh.server_connector.simulate_message(test_msg)
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assert mock_eh.last_message == test_msg
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assert not mock_eh.cleaned_up
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EventHandler.stop_all_instances()
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assert mock_eh.cleaned_up
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assert eh.server_connector.keys == test_keys
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def test_build_from_simple_object(test_keys, test_msg):
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class SimpleMockEventHandler:
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# pylint: disable=no-self-use
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def handle_event(self, message, server_connector):
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raise RuntimeError(message, server_connector)
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mock_eh = SimpleMockEventHandler()
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eh = MockEventHandlerFactory().build(mock_eh, keys=test_keys)
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with pytest.raises(RuntimeError) as err:
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eh.server_connector.simulate_message(test_msg)
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msg, keys = err.args
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assert msg == test_msg
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assert keys == test_keys
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def test_build_from_callable(test_keys, test_msg):
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class SomeCallable:
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def __init__(self):
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self.message = None
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self.cleaned_up = False
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def __call__(self, message, server_connector):
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self.message = message
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def cleanup(self):
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self.cleaned_up = True
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mock_eh = MockCallable()
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mock_eh = SomeCallable()
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assert not mock_eh.started
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eh = MockEventHandlerFactory().build(mock_eh, keys=test_keys)
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assert mock_eh.started
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assert mock_eh.server_connector is eh.server_connector
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assert eh.server_connector.keys == test_keys
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assert not mock_eh.message
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assert not mock_eh.last_message
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eh.server_connector.simulate_message(test_msg)
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assert mock_eh.message == test_msg
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assert mock_eh.last_message == test_msg
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assert not mock_eh.cleaned_up
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eh.stop()
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assert mock_eh.cleaned_up
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@ -133,7 +169,7 @@ def test_build_from_lambda(test_keys, test_msg):
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eh.server_connector.simulate_message(test_msg)
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def test_build_raises_if_no_key():
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def test_build_raises_if_no_key(test_keys):
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eh = MockEventHandler()
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with pytest.raises(ValueError):
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MockEventHandlerFactory().build(eh)
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@ -145,3 +181,6 @@ def test_build_raises_if_no_key():
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with pytest.raises(ValueError):
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MockEventHandlerFactory().build(lambda msg, sc: None)
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eh.keys = test_keys
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MockEventHandlerFactory().build(eh)
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