@Test
public void location_coordinates_can_be_set() {
Location l = createLocation();
l.setX(5);
l.setY(10);
assertEquals(5, l.x());
assertEquals(10, l.y());
}
@Test
public void location_coordinates_defaults_to_0_0() {
Location l = createLocation();
assertEquals(0, l.x());
assertEquals(0, l.y());
}