def test_component_detaches_from_child_after_child_is_remove():
component = Component(view=Mock(), presenter=Mock())
mock_cfactory = MockComponentFactory()
new_child = component.new_component(mock_cfactory)
component.remove_component(new_child)
assert new_child.on_destroyed.num_connections == 0
def test_component_remove_component():
component = Component(view=Mock(), presenter=Mock())
mock_cfactory = MockComponentFactory()
mock_child = tcast(Mock, component.new_component(mock_cfactory))
component.remove_component(mock_child)
mock_child.destroy.assert_called_once_with()
# Should raise an error if we try to remove again.
with pytest.raises(ValueError):
component.remove_component(mock_child)
def test_component_removes_child_if_child_is_destroyed():
component = Component(view=Mock(), presenter=Mock())
mock_cfactory = MockComponentFactory()
new_child = tcast(MockComponent, component.new_component(mock_cfactory))
new_child.sim_destroy()
# Should raise an error since child should have been automatically removed after it is destroyed.
with pytest.raises(ValueError):
component.remove_component(new_child)
# Child should not be destroyed again by previous call to `component.remove_component()`
new_child.destroy.assert_not_called()