def test_init_error(self):
# app
with self.assertRaises(EnforceError):
sev.EventListener(None, {})
# store
app = dash.Dash(name='test')
with self.assertRaises(EnforceError):
sev.EventListener(app, 'foo')
# memory
app = dash.Dash(name='test')
expected = 'Memory must be greater or equal to 1. 0 < 1.'
with self.assertRaisesRegexp(EnforceError, expected):
sev.EventListener(app, {}, memory=0)
def test_emit_error(self):
app = dash.Dash(name='test')
store = {'foo': 'bar'}
event = sev.EventListener(app, store)
expected = 'Event name must be a string. 99 is not a string.'
with self.assertRaisesRegexp(EnforceError, expected):
event.emit(99, callback)
def test_listen(self):
def callback(value, store, app):
store['foo'] = value
return store
app = dash.Dash(name='test')
store = {'foo': 'bar'}
event = sev.EventListener(app, store)
event.listen('foo', callback)
self.assertIs(event.events['foo'], callback)
def test_event_listener(self):
app = dash.Dash(name='test')
store = {}
event = sev.EventListener(app, store)
event.listen('foo', callback)
event.emit('foo', 'bar')
self.assertEqual(store, {})
self.assertEqual(event.store['foo'], 'bar')
self.assertEqual(event.state[0], {})
self.assertEqual(event.state[1], {'foo': 'bar'})
def test_store(self):
app = dash.Dash(name='test')
store = {'foo': 'bar'}
event = sev.EventListener(app, store).listen('foo', callback)
result = event.store
self.assertEqual(result, store)
self.assertIsNot(result, store)
event.emit('foo', 'bagel')
result = event.store
self.assertEqual(result, {'foo': 'bagel'})
def test_emit(self):
app = dash.Dash(name='test')
store = {'foo': 'bar'}
event = sev.EventListener(app, store)
event.listen('foo', callback)
# event
event.emit('foo', 'taco')
self.assertEqual(event.store['foo'], 'taco')
self.assertIsNot(event.state[0], store)
self.assertEqual(event.state[0], store)
self.assertEqual(event.state[1], {'foo': 'taco'})
self.assertEqual(len(event.state), 2)
# non-event
expected = len(event.state)
event.emit('not-event', 'pizza')
self.assertEqual(len(event.state), expected)
def test_init(self):
app = dash.Dash(name='test')
store = {'foo': 'bar'}
event = sev.EventListener(app, store)
self.assertEqual(event.store, store)
self.assertIsNot(event.store, store)