def test_mock_pin_frequency_unsupported():
    pin = MockPin(2)
    pin.frequency = None
    with pytest.raises(PinPWMUnsupported):
        pin.frequency = 100
def test_mock_pin_frequency_unsupported():
    with pytest.raises(AttributeError):
        pin = MockPin(3)
        pin.frequency = 100
def test_mock_pin_frequency_unsupported():
    with pytest.raises(AttributeError):
        pin = MockPin(3)
        pin.frequency = 100
def test_mock_pin_frequency_unsupported():
    pin = MockPin(2)
    pin.frequency = None
    with pytest.raises(PinPWMUnsupported):
        pin.frequency = 100