class LineTestCase(unittest.TestCase): def setUp(self): p0 = Point(0,0) p1 = Point(3,0) p2 = Point(3,4) self.l1 = Line(p0, p1) self.l2 = Line(p1, p2) self.l3 = Line(p2, p0) def testLengths(self): self.assertAlmostEqual(self.l1.length(), 3.0) self.assertAlmostEqual(self.l2.length(), 4.0) self.assertAlmostEqual(self.l3.length(), 5.0) def testDot(self): a0 = self.l2.angle(Point(1,1)) a1 = self.l2.angle(Point(5, 1)) a2 = self.l1.angle(Point(1,2)) a3 = self.l1.angle(Point(1,-2)) self.assertTrue(a0 > 0) self.assertTrue(a1 < 0) self.assertTrue(a2 > 0) self.assertTrue(a3 < 0)