public void testRectMerge() {
ga_Rectangle r = new ga_Rectangle(-10, 2, 3, 3);
ga_Rectangle s = new ga_Rectangle(-8, 4, 5, 3);
r = r.union(s);
assertEquals(new ga_Rectangle(-10, 2, 7, 5), r);
r = new ga_Rectangle(0, 0, 3, 3);
s = new ga_Rectangle(-1, 2, 1, 1);
r = r.union(s);
assertEquals(new ga_Rectangle(-1, 0, 4, 3), r);
}
