public void testIntersection() {
ga_Rectangle a = new ga_Rectangle(100, 100, 100, 100);
ga_Rectangle b = new ga_Rectangle(80, 80, 100, 100);
ga_Rectangle i = a.intersect(b);
assertEquals(new ga_Rectangle(100, 100, 80, 80), i);
b = new ga_Rectangle(80, 80, 20, 20);
i = a.intersect(b);
assertTrue(i.getPerimeter() == 0);
b.width = 10;
i = a.intersect(b);
assertNull(i);
b = new ga_Rectangle(180, 180, 30, 50);
i = a.intersect(b);
assertEquals(new ga_Rectangle(180, 180, 20, 20), i);
}
