def test_dot_product_requires_vector(self):
vector1 = Vector(-6, -8)
with self.assertRaises(TypeError):
vector1.dot("vector")
def test_dot_product_requires_equal_length(self):
vector1 = Vector(-6, 8)
vector2 = Mock(Vector)
vector2.length.return_value = 3
with self.assertRaises(ValueError):
vector1.dot(vector2)
def test_can_get_dot_product(self):
vector1 = Vector(-6, 8)
vector2 = Mock(Vector)
vector2._values = [5, 12]
vector2.length.return_value = 2
self.assertEqual(vector1.dot(vector2), 66)