def test_active_layer_none(self): assert get_active_layer({}, [lambda x: None]) is None
def test_active_layer_second(self): assert get_active_layer({}, [lambda x: None, lambda x: 'layer2']) == 'layer2'
def test_active_layer_trivial(self): assert get_active_layer({}, [lambda x: 'layer2']) == 'layer2'
def test_active_layer_second(self): assert get_active_layer( {}, [lambda x: None, lambda x: 'layer2']) == 'layer2'