def testIntersection(self):
ra = Rect(0, 0, 10, 10)
rb = Rect(5, 5, 15, 15)
res = ra.intersect(rb)
x, y, w, h = res.extent()
self.assertEquals(x, 5)
self.assertEquals(y, 5)
self.assertEquals(w, 5)
self.assertEquals(h, 5)
self.assertEquals(res.area(), 25)
rc = Rect(0, 0, 10, 10)
rd = Rect(11, 11, 21, 21)
res2 = rc.intersect(rd)
self.assertEquals(res2.area(), 0)
self.assertTrue(res2 is NullRect)
for i in range(1000):
a, b = G.intersectingPair()
self.assertTrue(a.intersect(b).area() > 0.0)
c, d = G.disjointPair()
self.assertEquals(c.intersect(d).area(), 0)
self.assertTrue(ra.intersect(NullRect) is NullRect)
self.assertTrue(NullRect.intersect(ra) is NullRect)
