def test_show_all_when_raise_error():
c = DummyDeviceControl(raise_error=Exception)
with pytest.raises(Exception):
c.show_all()
def test_show_all():
result_show_all = [{'key': 'value'}]
c = DummyDeviceControl(result_show_all=result_show_all)
assert c.show_all() == result_show_all