def test_store_can_handle_combined_reducers_with_singledispatch(self):
combined = combine_reducer([reducer_a, normal_reducer])
expected_state = freeze({
"normal_reducer": {
"my_type": "normal"
},
"reducer_a": {
"static": True
}
})
store = create_store(combined)
self.assertEqual(expected_state, store.state)
dyn_action = DynamicAction()
expected_state = freeze({
"normal_reducer": {
"my_type": "normal"
},
"reducer_a": {
"static": True,
"dynamic": "dynamo"
}
})
actual_state = store.dispatch(dyn_action)
self.assertEqual(expected_state, actual_state)
def test_middleware_will_be_called_on_first_user_dispatch(self):
combined_reducer = combine_reducer({
"n": normal_reducer,
"a": reducer_a
})
store = create_store(combined_reducer,
enhancer=apply_middleware(logging_middleware))
static_action = StaticAction(type="AppendAction", payload="900")
store.dispatch(static_action)
self.assertEqual(len(logger), 1)
self.assertNotEqual(logger[0]["old_state"], store.state)
self.assertEqual(
logger[0]["old_state"],
freeze({
"a": pmap({"static": True}),
"n": pmap({"my_type": "normal"}),
}))
self.assertEqual(logger[0]["new_state"], store.state)
self.assertEqual(
store.state,
freeze({
"a": {
"static": True,
'action': (static_action.type, static_action.payload)
},
"n": pmap({"my_type": "normal"}),
}))
def test_store_can_apply_single_middleware_and_dispatch(self):
combined_reducer = combine_reducer((normal_reducer, reducer_a))
static_action = StaticAction(type="AppendAction", payload="900")
store = create_store(combined_reducer,
enhancer=apply_middleware(logging_middleware))
new_state = store.dispatch(static_action)
self.assertEqual(new_state, store.state)
def test_store_can_handle_reducer_with_singledispatch(self):
store = create_store(reducer_a)
action = StaticAction(type="AppendAction", payload="900")
new_state = store.dispatch(action)
expected_state = freeze({
"static": True,
"action": ("AppendAction", "900")
})
self.assertEqual(new_state, store.state)
self.assertEqual(new_state, expected_state)
def test_exception_handling_works_properly(self):
global saga_runned
saga_runned = False
saga = Saga()
saga.take_every(AsyncTodo, my_saga_fetcher)
store = create_store(action_logger,
enhancer=apply_middleware(saga.saga_middleware))
store.dispatch(fetch_async_creator("this_is_failing"))
self.assertEqual(len(store.state["actions"]), 1)
self.assertIsInstance(store.state["actions"][0], AsyncFail)
self.assertTrue(saga_runned)
def test_non_saga_actions_get_passed_to_the_store(self):
global saga_runned
saga_runned = False
saga = Saga()
saga.take_every(AsyncTodo, my_saga_fetcher)
store = create_store(action_logger,
enhancer=apply_middleware(saga.saga_middleware))
store.dispatch(create_add_todo("Learn fancy"))
self.assertEqual(len(store.state["actions"]), 1)
self.assertIsInstance(store.state["actions"][0], Todo)
self.assertFalse(saga_runned)
def test_only_resolved_saga_actions_are_dispatched(self):
saga = Saga()
saga.take_every(AsyncTodo, my_saga_fetcher)
store = create_store(action_logger,
enhancer=apply_middleware(saga.saga_middleware))
store.dispatch(fetch_async_creator())
new_state = store.state
actions_ = new_state["actions"]
self.assertEqual(len(actions_), 1)
self.assertIsInstance(actions_[0], Todo)
self.assertEqual(actions_[0].payload, "None42")
self.assertTrue(saga_runned)
def test_middleware_will_be_called_after_store_init(self):
combined_reducer = combine_reducer({
"n": normal_reducer,
"a": reducer_a
})
store = create_store(combined_reducer,
enhancer=apply_middleware(logging_middleware))
self.assertEqual(len(logger), 0)
self.assertEqual(
store.state,
freeze({
"a": pmap({"static": True}),
"n": pmap({"my_type": "normal"}),
}))
class StoreImpl:
the_store = create_store(combine_reducer([default, config]))
@impl
def get_default_reducer(self):
return default
@impl
def get_config_reducer(self):
return config
@impl
def get_store(self):
return self.the_store
def test_only_notified_on_state_change(self):
calls = {}
def reducer(state, _):
return state
def listener():
calls['listener'] = True
store = create_store(reducer, {})
store.subscribe(listener)
store.dispatch({})
self.assertFalse(calls.get('listener', False), 'not notified')
def test_only_notified_on_state_change(self):
calls = {}
def reducer(state, _):
return state
def listener():
calls['listener'] = True
store = create_store(reducer, {})
store.subscribe(listener)
store.dispatch({})
self.assertFalse(calls.get('listener', False), 'not notified')
def test_create_dispatch_and_notify(self):
calls = {}
def reducer(state, action):
if action['type'] == 'MYTYPE':
calls['reducer'] = True
new_state = deepcopy(state)
new_state['reducer'] = True
return new_state
return state
def listener():
calls['listener'] = True
store = create_store(reducer, {})
store.subscribe(listener)
store.dispatch({'type': 'MYTYPE'})
self.assertTrue(store.state['reducer'], 'state not changed in reducer')
self.assertTrue(calls['reducer'], 'Not reduced')
self.assertTrue(calls['listener'], 'not notified')
def test_create_dispatch_and_notify(self):
calls = {}
def reducer(state, action):
if action['type'] == 'MYTYPE':
calls['reducer'] = True
new_state = deepcopy(state)
new_state['reducer'] = True
return new_state
return state
def listener():
calls['listener'] = True
store = create_store(reducer, {})
store.subscribe(listener)
store.dispatch({'type': 'MYTYPE'})
self.assertTrue(store.state['reducer'], 'state not changed in reducer')
self.assertTrue(calls['reducer'], 'Not reduced')
self.assertTrue(calls['listener'], 'not notified')
def test_can_apply_saga_middleware(self):
saga = Saga()
store = create_store(action_logger,
enhancer=apply_middleware(saga.saga_middleware))
self.assertIsNotNone(store)
if isinstance(action, INC_COUNTER):
new_state = state.set('count', state['count'] + 1)
return new_state
if isinstance(action, DEC_COUNTER):
new_state = state.set('count', state['count'] - 1)
return new_state
if isinstance(action, SET_COUNTER):
new_state = state.set('count', action.payload)
return new_state
if isinstance(action, ADD_COUNTER):
new_state = state.set('count', state['count'] + action.payload)
return new_state
return state
mystore = create_store(reducer)
def subscriber(s):
print(s.state)
mystore.subscribe(subscriber)
s = mystore.dispatch(SET_COUNTER(10))
s = mystore.dispatch(ADD_COUNTER(100))
for _ in range(10):
s = mystore.dispatch(INC_COUNTER())
