def test_delays_unsubscribe_until_the_end_of_current_dispatch(self):
store = create_store(reducers['todos'])
unsubscribe_handles = []
def do_unsubscribe_all():
for unsubscribe in unsubscribe_handles:
unsubscribe()
listener_1 = mock.MagicMock()
listener_2 = mock.MagicMock()
listener_3 = mock.MagicMock()
unsubscribe_handles.append(store['subscribe'](lambda: listener_1()))
unsubscribe_handles.append(store['subscribe'](
lambda: [listener_2(), do_unsubscribe_all()]))
unsubscribe_handles.append(store['subscribe'](lambda: listener_3()))
store['dispatch'](unknown_action())
self.assertEqual(len(listener_1.call_args_list), 1)
self.assertEqual(len(listener_2.call_args_list), 1)
self.assertEqual(len(listener_3.call_args_list), 1)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_1.call_args_list), 1)
self.assertEqual(len(listener_2.call_args_list), 1)
self.assertEqual(len(listener_3.call_args_list), 1)
def test_applied_reducer_to_initial_state(self):
store = create_store(reducers['todos'], [
{
'id': 1,
'text': 'Hello'
}
])
self.assertEqual(store['get_state'](), [
{
'id': 1,
'text': 'Hello'
}
])
store['dispatch'](unknown_action())
self.assertEqual(store['get_state'](), [
{
'id': 1,
'text': 'Hello'
}
])
store['dispatch'](add_todo('World'))
self.assertEqual(store['get_state'](), [
{
'id': 1,
'text': 'Hello'
},
{
'id': 2,
'text': 'World'
}
])
def test_delays_subscribe_until_the_end_of_current_dispatch(self): store = create_store(reducers['todos']) listener_1 = mock.MagicMock() listener_2 = mock.MagicMock() listener_3 = mock.MagicMock() listener_3_added = False def maybe_add_third_listener(): nonlocal listener_3_added if not listener_3_added: listener_3_added = True store['subscribe'](lambda: listener_3()) store['subscribe'](lambda: listener_1()) store['subscribe'](lambda: [listener_2(), maybe_add_third_listener()]) store['dispatch'](unknown_action()) self.assertEqual(len(listener_1.call_args_list), 1) self.assertEqual(len(listener_2.call_args_list), 1) self.assertEqual(len(listener_3.call_args_list), 0) store['dispatch'](unknown_action()) self.assertEqual(len(listener_1.call_args_list), 2) self.assertEqual(len(listener_2.call_args_list), 2) self.assertEqual(len(listener_3.call_args_list), 1)
def test_delays_subscribe_until_the_end_of_current_dispatch(self):
store = create_store(reducers['todos'])
listener_1 = mock.MagicMock()
listener_2 = mock.MagicMock()
listener_3 = mock.MagicMock()
listener_3_added = False
def maybe_add_third_listener():
nonlocal listener_3_added
if not listener_3_added:
listener_3_added = True
store['subscribe'](lambda: listener_3())
store['subscribe'](lambda: listener_1())
store['subscribe'](lambda: [listener_2(), maybe_add_third_listener()])
store['dispatch'](unknown_action())
self.assertEqual(len(listener_1.call_args_list), 1)
self.assertEqual(len(listener_2.call_args_list), 1)
self.assertEqual(len(listener_3.call_args_list), 0)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_1.call_args_list), 2)
self.assertEqual(len(listener_2.call_args_list), 2)
self.assertEqual(len(listener_3.call_args_list), 1)
def test_delays_unsubscribe_until_the_end_of_current_dispatch(self): store = create_store(reducers['todos']) unsubscribe_handles = [] def do_unsubscribe_all(): for unsubscribe in unsubscribe_handles: unsubscribe() listener_1 = mock.MagicMock() listener_2 = mock.MagicMock() listener_3 = mock.MagicMock() unsubscribe_handles.append(store['subscribe'](lambda: listener_1())) unsubscribe_handles.append(store['subscribe'](lambda: [listener_2(), do_unsubscribe_all()])) unsubscribe_handles.append(store['subscribe'](lambda: listener_3())) store['dispatch'](unknown_action()) self.assertEqual(len(listener_1.call_args_list), 1) self.assertEqual(len(listener_2.call_args_list), 1) self.assertEqual(len(listener_3.call_args_list), 1) store['dispatch'](unknown_action()) self.assertEqual(len(listener_1.call_args_list), 1) self.assertEqual(len(listener_2.call_args_list), 1) self.assertEqual(len(listener_3.call_args_list), 1)
def test_handles_nested_dispatches_gracefully(self):
def foo(state, action={}):
if state is None:
state = 0
if action.get('type') == 'foo':
return 1
return state
def bar(state, action={}):
if state is None:
state = 0
if action.get('type') == 'bar':
return 2
else:
return state
store = create_store(combine_reducers({'foo': foo, 'bar': bar}))
def kinda_component_did_update():
state = store['get_state']()
if state.get('bar') == 0:
store['dispatch']({'type': 'bar'})
store['subscribe'](kinda_component_did_update)
store['dispatch']({'type': 'foo'})
self.assertEqual(store['get_state'](), {'foo': 1, 'bar': 2})
def test_throws_if_action_type_is_none(self):
store = create_store(reducers['todos'])
with self.assertRaises(Exception) as e:
store['dispatch']({'type': None})
self.assertTrue(
'Actions may not have an undefined "type"' in str(e.exception))
def test_handles_nested_dispatches_gracefully(self):
def foo(state, action={}):
if state is None:
state = 0
if action.get('type') == 'foo':
return 1
return state
def bar(state, action={}):
if state is None:
state = 0
if action.get('type') == 'bar':
return 2
else:
return state
store = create_store(combine_reducers({ 'foo': foo, 'bar': bar }))
def kinda_component_did_update():
state = store['get_state']()
if state.get('bar') == 0:
store['dispatch']({ 'type': 'bar' })
store['subscribe'](kinda_component_did_update)
store['dispatch']({ 'type': 'foo' })
self.assertEqual(store['get_state'](), {
'foo': 1,
'bar': 2
})
def test_preserves_state_when_replacing_reducer(self):
store = create_store(reducers['todos'])
store['dispatch'](add_todo('Hello'))
store['dispatch'](add_todo('World'))
self.assertEqual(store['get_state'](), [{
'id': 1,
'text': 'Hello'
}, {
'id': 2,
'text': 'World'
}])
store['replace_reducer'](reducers['todos_reverse'])
self.assertEqual(store['get_state'](), [{
'id': 1,
'text': 'Hello'
}, {
'id': 2,
'text': 'World'
}])
store['dispatch'](add_todo('Perhaps'))
self.assertEqual(store['get_state'](), [{
'id': 3,
'text': 'Perhaps'
}, {
'id': 1,
'text': 'Hello'
}, {
'id': 2,
'text': 'World'
}])
store['replace_reducer'](reducers['todos'])
self.assertEqual(store['get_state'](), [{
'id': 3,
'text': 'Perhaps'
}, {
'id': 1,
'text': 'Hello'
}, {
'id': 2,
'text': 'World'
}])
store['dispatch'](add_todo('Surely'))
self.assertEqual(store['get_state'](), [{
'id': 3,
'text': 'Perhaps'
}, {
'id': 1,
'text': 'Hello'
}, {
'id': 2,
'text': 'World'
}, {
'id': 4,
'text': 'Surely'
}])
def test_does_not_throw_if_action_type_is_falsy(self):
store = create_store(reducers['todos'])
try:
store['dispatch']({ 'type': False })
store['dispatch']({ 'type': 0 })
store['dispatch']({ 'type': '' })
except Exception:
self.fail('These should not have raised an exception')
def test_passes_initial_action_and_initial_state(self):
store = create_store(reducers['todos'], [
{
'id': 1,
'text': 'Hello'
}
])
self.assertEqual(store['get_state'](), [{ 'id': 1, 'text': 'Hello' }])
def test_provides_up_to_date_state_when_subscriber_is_notified(self):
store = create_store(reducers['todos'])
def callback():
state = store['get_state']()
self.assertEqual(state, [{'id': 1, 'text': 'Hello'}])
store['dispatch'](add_todo('Hello'))
def test_does_not_throw_if_action_type_is_falsy(self):
store = create_store(reducers['todos'])
try:
store['dispatch']({'type': False})
store['dispatch']({'type': 0})
store['dispatch']({'type': ''})
except Exception:
self.fail('These should not have raised an exception')
def test_exposes_public_API(self):
store = create_store(combine_reducers(reducers))
methods = store.keys()
self.assertEqual(len(methods), 4)
self.assertTrue('subscribe' in methods)
self.assertTrue('dispatch' in methods)
self.assertTrue('get_state' in methods)
self.assertTrue('replace_reducer' in methods)
def test_exposes_public_API(self):
store = create_store(combine_reducers(reducers))
methods = store.keys()
self.assertEqual(len(methods), 4)
self.assertTrue('subscribe' in methods)
self.assertTrue('dispatch' in methods)
self.assertTrue('get_state' in methods)
self.assertTrue('replace_reducer' in methods)
def test_throws_if_listener_is_not_a_function(self):
store = create_store(reducers['todos'])
with self.assertRaises(Exception):
store['subscribe']()
with self.assertRaises(Exception):
store['subscribe']('')
with self.assertRaises(Exception):
store['subscribe'](None)
def test_throws_if_listener_is_not_a_function(self):
store = create_store(reducers['todos'])
with self.assertRaises(Exception):
store['subscribe']()
with self.assertRaises(Exception):
store['subscribe']('')
with self.assertRaises(Exception):
store['subscribe'](None)
def test_throws_if_reducer_is_not_a_function(self):
with self.assertRaises(Exception):
create_store(combine_reducers)
with self.assertRaises(Exception):
create_store('test')
with self.assertRaises(Exception):
create_store({})
try:
create_store(lambda *x: {})
except Exception as e:
self.fail('create_store(lambda: {}) should not have failed')
def test_throws_if_reducer_is_not_a_function(self):
with self.assertRaises(Exception):
create_store(combine_reducers)
with self.assertRaises(Exception):
create_store('test')
with self.assertRaises(Exception):
create_store({})
try:
create_store(lambda *x: {})
except Exception as e:
self.fail('create_store(lambda: {}) should not have failed')
def test_throws_if_next_reducer_is_not_a_function(self):
store = create_store(reducers['todos'])
with self.assertRaises(Exception) as e:
store['replace_reducer']()
self.assertTrue('Expected next_reducer to be a function' in str(e.exception))
try:
store['replace_reducer'](lambda *x: x)
except Exception:
self.fail('Should not have raised an exception')
def test_provides_up_to_date_state_when_subscriber_is_notified(self):
store = create_store(reducers['todos'])
def callback():
state = store['get_state']()
self.assertEqual(state, [
{
'id': 1,
'text': 'Hello'
}
])
store['dispatch'](add_todo('Hello'))
def test_throws_if_next_reducer_is_not_a_function(self):
store = create_store(reducers['todos'])
with self.assertRaises(Exception) as e:
store['replace_reducer']()
self.assertTrue(
'Expected next_reducer to be a function' in str(e.exception))
try:
store['replace_reducer'](lambda *x: x)
except Exception:
self.fail('Should not have raised an exception')
def test_only_removes_relevant_listener_when_unsubscribe_is_called(self):
store = create_store(reducers['todos'])
listener = mock.MagicMock()
store['subscribe'](listener)
unsubscribe_second = store['subscribe'](listener)
unsubscribe_second()
unsubscribe_second()
store['dispatch'](unknown_action())
self.assertEqual(len(listener.call_args_list), 1)
def test_only_removes_relevant_listener_when_unsubscribe_is_called(self): store = create_store(reducers['todos']) listener = mock.MagicMock() store['subscribe'](listener) unsubscribe_second = store['subscribe'](listener) unsubscribe_second() unsubscribe_second() store['dispatch'](unknown_action()) self.assertEqual(len(listener.call_args_list), 1)
def test_only_removes_listener_once_when_unsubscribe_is_called(self):
store = create_store(reducers['todos'])
listener_a = mock.MagicMock()
listener_b = mock.MagicMock()
unsubscribe_a = store['subscribe'](listener_a)
store['subscribe'](listener_b)
unsubscribe_a()
unsubscribe_a()
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 0)
self.assertEqual(len(listener_b.call_args_list), 1)
def test_only_removes_listener_once_when_unsubscribe_is_called(self): store = create_store(reducers['todos']) listener_a = mock.MagicMock() listener_b = mock.MagicMock() unsubscribe_a = store['subscribe'](listener_a) store['subscribe'](listener_b) unsubscribe_a() unsubscribe_a() store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 0) self.assertEqual(len(listener_b.call_args_list), 1)
def test_only_accepts_plain_objects(self):
store = create_store(reducers['todos'])
try:
store['dispatch'](unknown_action())
except Exception:
self.fail('Should not have thrown exception')
class AwesomeMap:
def __init__(self):
self.x = 1
for non_object in [None, 42, 'hey', AwesomeMap()]:
with self.assertRaises(Exception):
store['dispatch'](non_object)
def test_only_accepts_plain_objects(self):
store = create_store(reducers['todos'])
try:
store['dispatch'](unknown_action())
except Exception:
self.fail('Should not have thrown exception')
class AwesomeMap:
def __init__(self):
self.x = 1
for non_object in [None, 42, 'hey', AwesomeMap()]:
with self.assertRaises(Exception):
store['dispatch'](non_object)
def test_applied_reducer_to_initial_state(self):
store = create_store(reducers['todos'], [{'id': 1, 'text': 'Hello'}])
self.assertEqual(store['get_state'](), [{'id': 1, 'text': 'Hello'}])
store['dispatch'](unknown_action())
self.assertEqual(store['get_state'](), [{'id': 1, 'text': 'Hello'}])
store['dispatch'](add_todo('World'))
self.assertEqual(store['get_state'](), [{
'id': 1,
'text': 'Hello'
}, {
'id': 2,
'text': 'World'
}])
def test_supports_removing_a_subscription_within_a_subscription(self):
store = create_store(reducers['todos'])
listener_a = mock.MagicMock()
listener_b = mock.MagicMock()
listener_c = mock.MagicMock()
store['subscribe'](listener_a)
unsub_b = store['subscribe'](lambda: [listener_b(), unsub_b()])
store['subscribe'](listener_c)
store['dispatch'](unknown_action())
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 2)
self.assertEqual(len(listener_b.call_args_list), 1)
self.assertEqual(len(listener_c.call_args_list), 2)
def test_supports_removing_a_subscription_within_a_subscription(self): store = create_store(reducers['todos']) listener_a = mock.MagicMock() listener_b = mock.MagicMock() listener_c = mock.MagicMock() store['subscribe'](listener_a) unsub_b = store['subscribe'](lambda: [listener_b(), unsub_b()]) store['subscribe'](listener_c) store['dispatch'](unknown_action()) store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 2) self.assertEqual(len(listener_b.call_args_list), 1) self.assertEqual(len(listener_c.call_args_list), 2)
def test_supports_multiple_subscriptions(self):
store = create_store(reducers['todos'])
listener_a = mock.MagicMock()
listener_b = mock.MagicMock()
unsubscribe_a = store['subscribe'](listener_a)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 1)
self.assertEqual(len(listener_b.call_args_list), 0)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 2)
self.assertEqual(len(listener_b.call_args_list), 0)
unsubscribe_b = store['subscribe'](listener_b)
self.assertEqual(len(listener_a.call_args_list), 2)
self.assertEqual(len(listener_b.call_args_list), 0)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 3)
self.assertEqual(len(listener_b.call_args_list), 1)
unsubscribe_a()
self.assertEqual(len(listener_a.call_args_list), 3)
self.assertEqual(len(listener_b.call_args_list), 1)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 3)
self.assertEqual(len(listener_b.call_args_list), 2)
unsubscribe_b()
self.assertEqual(len(listener_a.call_args_list), 3)
self.assertEqual(len(listener_b.call_args_list), 2)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 3)
self.assertEqual(len(listener_b.call_args_list), 2)
unsubscribe_a = store['subscribe'](listener_a)
self.assertEqual(len(listener_a.call_args_list), 3)
self.assertEqual(len(listener_b.call_args_list), 2)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_a.call_args_list), 4)
self.assertEqual(len(listener_b.call_args_list), 2)
def test_supports_multiple_subscriptions(self): store = create_store(reducers['todos']) listener_a = mock.MagicMock() listener_b = mock.MagicMock() unsubscribe_a = store['subscribe'](listener_a) store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 1) self.assertEqual(len(listener_b.call_args_list), 0) store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 2) self.assertEqual(len(listener_b.call_args_list), 0) unsubscribe_b = store['subscribe'](listener_b) self.assertEqual(len(listener_a.call_args_list), 2) self.assertEqual(len(listener_b.call_args_list), 0) store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 3) self.assertEqual(len(listener_b.call_args_list), 1) unsubscribe_a() self.assertEqual(len(listener_a.call_args_list), 3) self.assertEqual(len(listener_b.call_args_list), 1) store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 3) self.assertEqual(len(listener_b.call_args_list), 2) unsubscribe_b() self.assertEqual(len(listener_a.call_args_list), 3) self.assertEqual(len(listener_b.call_args_list), 2) store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 3) self.assertEqual(len(listener_b.call_args_list), 2) unsubscribe_a = store['subscribe'](listener_a) self.assertEqual(len(listener_a.call_args_list), 3) self.assertEqual(len(listener_b.call_args_list), 2) store['dispatch'](unknown_action()) self.assertEqual(len(listener_a.call_args_list), 4) self.assertEqual(len(listener_b.call_args_list), 2)
def test_accepts_enhancer_as_second_argument_if_no_initial_state(self):
def spy_enhancer(vanilla_create_store):
def enhancer(*args):
self.assertEqual(args[0], reducers['todos'])
self.assertEqual(args[1], None)
self.assertEqual(len(args), 2)
vanilla_store = vanilla_create_store(*args)
vanilla_store['dispatch'] = mock.MagicMock(
side_effect=vanilla_store['dispatch'])
return vanilla_store
return enhancer
store = create_store(reducers['todos'], spy_enhancer)
action = add_todo('Hello')
store['dispatch'](action)
self.assertEqual(store['dispatch'].call_args_list, [mock.call(action)])
self.assertEqual(store['get_state'](), [{'id': 1, 'text': 'Hello'}])
def test_uses_last_snapshot_of_subscribers_during_nested_dispatch(self):
store = create_store(reducers['todos'])
listener_1 = mock.MagicMock()
listener_2 = mock.MagicMock()
listener_3 = mock.MagicMock()
listener_4 = mock.MagicMock()
unsubscribe_4 = None
unsubscribe_1 = None
def callback_for_listener_1():
nonlocal unsubscribe_1, unsubscribe_4
listener_1()
self.assertEqual(len(listener_1.call_args_list), 1)
self.assertEqual(len(listener_2.call_args_list), 0)
self.assertEqual(len(listener_3.call_args_list), 0)
self.assertEqual(len(listener_4.call_args_list), 0)
unsubscribe_1()
unsubscribe_4 = store['subscribe'](listener_4)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_1.call_args_list), 1)
self.assertEqual(len(listener_2.call_args_list), 1)
self.assertEqual(len(listener_3.call_args_list), 1)
self.assertEqual(len(listener_4.call_args_list), 1)
unsubscribe_1 = store['subscribe'](callback_for_listener_1)
store['subscribe'](listener_2)
store['subscribe'](listener_3)
store['dispatch'](unknown_action())
self.assertEqual(len(listener_1.call_args_list), 1)
self.assertEqual(len(listener_2.call_args_list), 2)
self.assertEqual(len(listener_3.call_args_list), 2)
self.assertEqual(len(listener_4.call_args_list), 1)
unsubscribe_4()
store['dispatch'](unknown_action())
self.assertEqual(len(listener_1.call_args_list), 1)
self.assertEqual(len(listener_2.call_args_list), 3)
self.assertEqual(len(listener_3.call_args_list), 3)
self.assertEqual(len(listener_4.call_args_list), 1)
def test_uses_last_snapshot_of_subscribers_during_nested_dispatch(self): store = create_store(reducers['todos']) listener_1 = mock.MagicMock() listener_2 = mock.MagicMock() listener_3 = mock.MagicMock() listener_4 = mock.MagicMock() unsubscribe_4 = None unsubscribe_1 = None def callback_for_listener_1(): nonlocal unsubscribe_1, unsubscribe_4 listener_1() self.assertEqual(len(listener_1.call_args_list), 1) self.assertEqual(len(listener_2.call_args_list), 0) self.assertEqual(len(listener_3.call_args_list), 0) self.assertEqual(len(listener_4.call_args_list), 0) unsubscribe_1() unsubscribe_4 = store['subscribe'](listener_4) store['dispatch'](unknown_action()) self.assertEqual(len(listener_1.call_args_list), 1) self.assertEqual(len(listener_2.call_args_list), 1) self.assertEqual(len(listener_3.call_args_list), 1) self.assertEqual(len(listener_4.call_args_list), 1) unsubscribe_1 = store['subscribe'](callback_for_listener_1) store['subscribe'](listener_2) store['subscribe'](listener_3) store['dispatch'](unknown_action()) self.assertEqual(len(listener_1.call_args_list), 1) self.assertEqual(len(listener_2.call_args_list), 2) self.assertEqual(len(listener_3.call_args_list), 2) self.assertEqual(len(listener_4.call_args_list), 1) unsubscribe_4() store['dispatch'](unknown_action()) self.assertEqual(len(listener_1.call_args_list), 1) self.assertEqual(len(listener_2.call_args_list), 3) self.assertEqual(len(listener_3.call_args_list), 3) self.assertEqual(len(listener_4.call_args_list), 1)
def test_accepts_enhancer_as_second_argument_if_no_initial_state(self):
def spy_enhancer(vanilla_create_store):
def enhancer(*args):
self.assertEqual(args[0], reducers['todos'])
self.assertEqual(args[1], None)
self.assertEqual(len(args), 2)
vanilla_store = vanilla_create_store(*args)
vanilla_store['dispatch'] = mock.MagicMock(side_effect=vanilla_store['dispatch'])
return vanilla_store
return enhancer
store = create_store(reducers['todos'], spy_enhancer)
action = add_todo('Hello')
store['dispatch'](action)
self.assertEqual(store['dispatch'].call_args_list, [mock.call(action)])
self.assertEqual(store['get_state'](), [{
'id': 1,
'text': 'Hello'
}])
def test_warns_if_no_reducers_passed_to_combine_reducers(self, logging):
def foo(state=None, action=None):
if state is None:
state = { 'bar': 1}
return state
def baz(state=None, action=None):
if state is None:
state = { 'qux': 3 }
return state
reducer = combine_reducers({
'foo': foo,
'baz': baz
})
reducer()
self.assertEqual(len(logging.call_args_list), 0)
reducer({ 'foo': { 'bar': 2 }})
self.assertEqual(len(logging.call_args_list), 0)
reducer({
'foo': { 'bar': 2 },
'baz': { 'qux': 4 }
})
self.assertEqual(len(logging.call_args_list), 0)
create_store(reducer, { 'bar': 2 })
m = str(logging.call_args_list[0])
self.assertTrue(re.search(r'Unexpected key "bar".*create_store.*instead: ("foo"|"baz"), ("foo"|"baz")', m))
create_store(reducer, { 'bar': 2, 'qux': 4, 'thud': 5 })
m = str(logging.call_args_list[1])
self.assertTrue(re.search(r'Unexpected keys ("qux"|"thud"), ("qux"|"thud").*create_store.*instead: ("foo"|"baz"), ("foo"|"baz")', m))
create_store(reducer, 1)
m = str(logging.call_args_list[2])
self.assertTrue(re.search(r'create_store has an unexpected type of <class "int">.*keys: ("foo"|"baz"), ("foo"|"baz")', m))
reducer({ 'corge': 2 })
m = str(logging.call_args_list[3])
self.assertTrue(re.search(r'Unexpected key "corge".*reducer.*instead: ("foo"|"baz"), ("foo"|"baz")', m))
reducer({ 'rick': 2, 'morty': 4 })
m = str(logging.call_args_list[4])
self.assertTrue(re.search(r'Unexpected keys ("rick"|"morty"), ("rick"|"morty").*reducer.*instead: ("foo"|"baz"), ("foo"|"baz")', m))
reducer(1)
m = str(logging.call_args_list[5])
self.assertTrue(re.search(r'reducer has an unexpected type of <class "int">', m))
def test_throws_if_enhancer_is_neither_undefined_or_a_function(self):
with self.assertRaises(Exception):
create_store(reducers['todos'], None, {})
with self.assertRaises(Exception):
create_store(reducers['todos'], None, [])
with self.assertRaises(Exception):
create_store(reducers['todos'], None, False)
try:
create_store(reducers['todos'], None, None)
create_store(reducers['todos'], None, lambda x: x)
create_store(reducers['todos'], lambda x: x)
create_store(reducers['todos'], [])
create_store(reducers['todos'], {})
except Exception:
self.fail('Should not have thrown an exception')
def test_throws_if_enhancer_is_neither_undefined_or_a_function(self):
with self.assertRaises(Exception):
create_store(reducers['todos'], None, {})
with self.assertRaises(Exception):
create_store(reducers['todos'], None, [])
with self.assertRaises(Exception):
create_store(reducers['todos'], None, False)
try:
create_store(reducers['todos'], None, None)
create_store(reducers['todos'], None, lambda x: x)
create_store(reducers['todos'], lambda x: x)
create_store(reducers['todos'], [])
create_store(reducers['todos'], {})
except Exception:
self.fail('Should not have thrown an exception')
def test_does_not_allow_dispatch_from_within_reducer(self):
store = create_store(reducers['dispatch_in_middle_of_reducer'])
with self.assertRaises(Exception) as e:
store['dispatch'](dispatch_in_middle(lambda: store['dispatch']
(unknown_action())))
self.assertTrue('may not dispatch' in str(e.exception))
def setUp(self): self.store = create_store(todos) self.action_creator_functions = dict(action_creators) for key in self.action_creator_functions: if not hasattr(self.action_creator_functions[key], '__call__'): del self.action_creator_functions[key]
def test_preserves_state_when_replacing_reducer(self):
store = create_store(reducers['todos'])
store['dispatch'](add_todo('Hello'))
store['dispatch'](add_todo('World'))
self.assertEqual(store['get_state'](), [
{
'id': 1,
'text': 'Hello'
},
{
'id': 2,
'text': 'World'
}
])
store['replace_reducer'](reducers['todos_reverse'])
self.assertEqual(store['get_state'](), [
{
'id': 1,
'text': 'Hello'
},
{
'id': 2,
'text': 'World'
}
])
store['dispatch'](add_todo('Perhaps'))
self.assertEqual(store['get_state'](), [
{
'id': 3,
'text': 'Perhaps'
},
{
'id': 1,
'text': 'Hello'
},
{
'id': 2,
'text': 'World'
}
])
store['replace_reducer'](reducers['todos'])
self.assertEqual(store['get_state'](), [
{
'id': 3,
'text': 'Perhaps'
},
{
'id': 1,
'text': 'Hello'
},
{
'id': 2,
'text': 'World'
}
])
store['dispatch'](add_todo('Surely'))
self.assertEqual(store['get_state'](), [
{
'id': 3,
'text': 'Perhaps'
},
{
'id': 1,
'text': 'Hello'
},
{
'id': 2,
'text': 'World'
},
{
'id': 4,
'text': 'Surely'
}
])
def test_passes_initial_action_and_initial_state(self):
store = create_store(reducers['todos'], [{'id': 1, 'text': 'Hello'}])
self.assertEqual(store['get_state'](), [{'id': 1, 'text': 'Hello'}])
def test_throws_if_action_type_is_none(self):
store = create_store(reducers['todos'])
with self.assertRaises(Exception) as e:
store['dispatch']({ 'type': None })
self.assertTrue('Actions may not have an undefined "type"' in str(e.exception))
def setUp(self):
self.store = create_store(todos)
self.action_creator_functions = dict(action_creators)
for key in self.action_creator_functions:
if not hasattr(self.action_creator_functions[key], '__call__'):
del self.action_creator_functions[key]
def test_does_not_allow_dispatch_from_within_reducer(self):
store = create_store(reducers['dispatch_in_middle_of_reducer'])
with self.assertRaises(Exception) as e:
store['dispatch'](dispatch_in_middle(lambda: store['dispatch'](unknown_action())))
self.assertTrue('may not dispatch' in str(e.exception))
