def test_move2(self):
rw = RandomWalk()
rw.move(0, 1)
self.assertAlmostEqual(1, rw.distance(), 7)
rw.move(0, 1)
self.assertAlmostEqual(2, rw.distance(), 7)
rw.move(0, -1)
self.assertAlmostEqual(1, rw.distance(), 7)
rw.move(0, -1)
self.assertAlmostEqual(0, rw.distance(), 7)
def test_move3(self):
rw = RandomWalk()
root2 = math.sqrt(2)
rw.move(1, 1)
self.assertAlmostEqual(root2, rw.distance(), 7)
rw.move(1, 1)
self.assertAlmostEqual(2 * root2, rw.distance(), 7)
rw.move(0, -2)
self.assertAlmostEqual(2, rw.distance(), 7)
rw.move(-2, 0)
self.assertAlmostEqual(0, rw.distance(), 7)
def test_move0(self):
rw = RandomWalk()
rw.move(1, 0)
self.assertAlmostEqual(1, rw.distance(), 7)