def test_negation(self):
p = geometry.Triple(12, -2345, 16)
q = -p
self.assertEqual(12, p.x)
self.assertEqual(-2345, p.y)
self.assertEqual(16, p.z)
self.assertEqual(-12, q.x)
self.assertEqual(2345, q.y)
self.assertEqual(-16, q.z)
def test_difference(self):
p = geometry.Triple(1, 3, 2)
q = geometry.Triple(2, 6, 4)
r = p - q
self.assertEqual(1, p.x)
self.assertEqual(3, p.y)
self.assertEqual(2, p.z)
self.assertEqual(2, q.x)
self.assertEqual(6, q.y)
self.assertEqual(4, q.z)
self.assertEqual(-1, r.x)
self.assertEqual(-3, r.y)
self.assertEqual(-2, r.z)
p -= q
self.assertEqual(2, q.x)
self.assertEqual(6, q.y)
self.assertEqual(4, q.z)
self.assertEqual(-1, p.x)
self.assertEqual(-3, p.y)
self.assertEqual(-2, p.z)
def test_addition(self):
p = geometry.Triple(1, 3, 2)
q = geometry.Triple(-2, -6, -4)
r = p + q
self.assertEqual(1, p.x)
self.assertEqual(3, p.y)
self.assertEqual(2, p.z)
self.assertEqual(-2, q.x)
self.assertEqual(-6, q.y)
self.assertEqual(-4, q.z)
self.assertEqual(-1, r.x)
self.assertEqual(-3, r.y)
self.assertEqual(-2, r.z)
p += q
self.assertEqual(-2, q.x)
self.assertEqual(-6, q.y)
self.assertEqual(-4, q.z)
self.assertEqual(-1, p.x)
self.assertEqual(-3, p.y)
self.assertEqual(-2, p.z)
def test_multiplication(self):
p = geometry.Triple(12, -2345, 16)
q = 3 * p
self.assertEqual(3 * p.x, q.x)
self.assertEqual(3 * p.y, q.y)
self.assertEqual(3 * p.z, q.z)
r = p * 3
self.assertEqual(q.x, r.x)
self.assertEqual(q.y, r.y)
self.assertEqual(q.z, r.z)
p *= 3
self.assertEqual(q.x, p.x)
self.assertEqual(q.y, p.y)
self.assertEqual(q.z, p.z)
def test_str(self):
triple = (0, 2, -1)
point = geometry.Triple(*triple)
self.assertEqual(str(triple), str(point))
def test_update_x(self):
point = geometry.Triple(2, -5, 11)
point.x += 3
self.assertEqual(5, point.x)
def test_unpack(self):
point = geometry.Triple(2, -7, 11)
x, y, z = point
self.assertEqual(point.x, x)
self.assertEqual(point.y, y)
self.assertEqual(point.z, z)