def test_remove_selection_provider(self):
service = SelectionService()
provider = BogusSelectionProvider(provider_id='Bogus')
service.add_selection_provider(provider)
service.remove_selection_provider(provider)
self.assertFalse(service.has_selection_provider(provider.provider_id))
with self.assertRaises(ProviderNotRegisteredError):
service.remove_selection_provider(provider)
def test_remove_selection_provider(self):
service = SelectionService()
provider = BogusSelectionProvider(provider_id='Bogus')
service.add_selection_provider(provider)
service.remove_selection_provider(provider)
self.assertFalse(service.has_selection_provider(provider.provider_id))
with self.assertRaises(ProviderNotRegisteredError):
service.remove_selection_provider(provider)
def test_connect_listener_then_add_remove_provider(self):
service = SelectionService()
provider_id = 'Bogus'
# Connect listener before provider is registered.
listener = BogusListener()
service.connect_selection_listener(provider_id,
listener.on_selection_changed)
# When the provider is first added, the listener should receive the
# initial selection (as returned by provider.get_selection)
provider = BogusSelectionProvider(provider_id=provider_id)
expected = provider.get_selection()
service.add_selection_provider(provider)
selections = listener.selections
self.assertEqual(len(selections), 1)
self.assertEqual(selections[-1].content, expected.content)
# When the provider changes the selection, the event arrive as usual.
content = [1, 2, 3]
provider.trigger_selection(content)
self.assertEqual(len(selections), 2)
self.assertEqual(selections[-1].content, content)
# When we un-register the provider, a change in selection does not
# generate a callback.
service.remove_selection_provider(provider)
provider.trigger_selection(content)
self.assertEqual(len(selections), 2)
# Finally, we register again and get the current selection.
service.add_selection_provider(provider)
self.assertEqual(len(selections), 3)
self.assertEqual(selections[-1].content, expected.content)
def test_connect_listener_then_add_remove_provider(self):
service = SelectionService()
provider_id = 'Bogus'
# Connect listener before provider is registered.
listener = BogusListener()
service.connect_selection_listener(provider_id,
listener.on_selection_changed)
# When the provider is first added, the listener should receive the
# initial selection (as returned by provider.get_selection)
provider = BogusSelectionProvider(provider_id=provider_id)
expected = provider.get_selection()
service.add_selection_provider(provider)
selections = listener.selections
self.assertEqual(len(selections), 1)
self.assertEqual(selections[-1].content, expected.content)
# When the provider changes the selection, the event arrive as usual.
content = [1, 2, 3]
provider.trigger_selection(content)
self.assertEqual(len(selections), 2)
self.assertEqual(selections[-1].content, content)
# When we un-register the provider, a change in selection does not
# generate a callback.
service.remove_selection_provider(provider)
provider.trigger_selection(content)
self.assertEqual(len(selections), 2)
# Finally, we register again and get the current selection.
service.add_selection_provider(provider)
self.assertEqual(len(selections), 3)
self.assertEqual(selections[-1].content, expected.content)