@Test
public void testTurnOffLigt() {
TurnCommand turnOff = new TurnOffCommand();
Light light = new Light();
turnOff.setLight(light);
Switcher switcher = new Switcher(null, turnOff);
switcher.flipDown();
assertFalse(light.isTurnedOn());
try {
turnOff.setLight(null);
turnOff.execute();
fail();
} catch (NullPointerException e) {
}
}
@Test
public void testTurnOnLight() {
TurnCommand turnOn = new TurnOnCommand();
Light light = new Light();
turnOn.setLight(light);
Switcher switcher = new Switcher(turnOn, null);
switcher.flipUp();
assertTrue(light.isTurnedOn());
try {
turnOn.setLight(null);
turnOn.execute();
fail();
} catch (NullPointerException e) {
}
}