def test_set_target_speed(mock_inverter):
"""Test outgoing command called with correct parameter."""
fridge = Fridge(mock_inverter)
fridge.set_target_speed(1000)
mock_inverter.set_target_speed.assert_called_once_with(1000)
def test_set_target_speed(mock_inverter, expected):
"""Test behavior of fridge when current speed matches set speed."""
fridge = Fridge(mock_inverter)
fridge.set_target_speed(expected)
mock_inverter.set_target_speed.assert_called_once_with(expected)
def test_raises_exception_if_curr_spd_not_target(mock_inverter):
"""Test behavior of fridge when current speed differs from set speed."""
with pytest.raises(ValueError,
message="Unable to confirm fan speed change."):
fridge = Fridge(mock_inverter)
fridge.set_target_speed(1500)
