def test_polynomial_should_order_by_power():
a = Polynomial(Term(2,1),Term(3,3),Term(2,2))
assert a.p() == ' 3X3 2X2 2X1'
def test_polynomial_should_add_up_terms_with_same_power():
a =Polynomial(Term(2,1),Term(3,1))
assert a.p() == ' 5X1'
def test_polynomial_print():
a = Polynomial(Term(2,1),Term(3,2))
assert a.p() == ' 3X2 2X1'