def test_vector_product_parallel(self):
v1 = Vector(1, 0, 0)
v2 = Vector(2, 0, 0)
v = v1.vector_product(v2)
self.assertEquals(v.length, 0)
def test_vector_product_zero(self):
v1 = Vector(1, 0, 0)
v2 = Vector(0, 0, 0)
v = v1.vector_product(v2)
self.assertEquals(v.length, 0)
def test_vector_product(self):
v1 = Vector(1, 0, 0)
v2 = Vector(0, 1, 0)
v = v1.vector_product(v2)
self.assertEquals(v, Vector(0, 0, 1))