@Test
public void testReduceHealth() throws Exception {
Obstacle o = new Circle(new Coordinates(0, 0));
int hp = o.getHealth();
hp -= 30;
o.reduceHealth(30);
assertTrue(o.getHealth() == hp);
}
@Test
public void testGetHealth() throws Exception {
Obstacle o = new Circle(new Coordinates(0, 0));
assertTrue(o.getHealth() == Obstacle.MAX_HEALTH);
}