def test_repr():
#Testing positive numbers
p = Polynomial([10,11,-12,13,14,15]) # 4,3,2,1 -> 4x^3, 3x^2, 2x, 1
assert Polynomial.__repr__(p) == "15x^5 + 14x^4 + 13x^3 - 12x^2 + 11x + 10"
#Testing negative numbers
p1 = Polynomial([-10,11,-12,13,14,-15]) # 4,3,2,1 -> 4x^3, 3x^2, 2x, 1
assert Polynomial.__repr__(p1) == "- 15x^5 + 14x^4 + 13x^3 - 12x^2 + 11x - 10"
#Testing if it actually removes 0's
p1 = Polynomial([-10,11,-12,0,14,-15]) # 4,3,2,1 -> 4x^3, 3x^2, 2x, 1
assert Polynomial.__repr__(p1) == "- 15x^5 + 14x^4 - 12x^2 + 11x - 10"
def test_polynomial():
""" Testing if a Polynomial assetion at a given point is correct"""
tol = 1e-8
poly1 = Polynomial([1, 2, 2])
evaluation_at_4, expected_value_4 = poly1(4), 41
msg_value = "Expected value at x=%g: %f, Calcualted value at x=%g: %f" % (
4, expected_value_4, 4, evaluation_at_4)
assert (abs(evaluation_at_4 - expected_value_4) < tol), msg_value
"""Testing function for adding and subtracting two Polynomials"""
poly2 = Polynomial([2, 5])
expected_new_poly_sum = [3, 7, 2]
expected_new_poly_sub = [-1, -3, 2]
sum_poly = (poly1 + poly2)
sub_poly = (poly1 - poly2)
msg_sum_poly = "Expected new polynom sum: %s, Calculated new polynom sum: %s" % (
expected_new_poly_sum, sum_poly)
msg_sub_poly = "Expected new polynom subtraction: %s, Calculated new polynom subtraction: %s" % (
expected_new_poly_sub, sub_poly)
assert (expected_new_poly_sum == sum_poly), msg_sum_poly
assert (expected_new_poly_sub == sub_poly), msg_sub_poly
""" Testing if the class returns the corrct degree of the polynom"""
expected_degree = 2
poly1 = Polynomial([1, 2, 3, 0])
returned_degree = poly1.degree()
msg_degree = "Returned degree %i Expected Degree: %i" % (returned_degree,
expected_degree)
assert (expected_degree == returned_degree), msg_degree
""" Testing if __repr__ works correctly"""
expected_string = "1 + 2x + 3x^2"
print_msg = "Retuned string do nat match expected string"
assert (poly1.__repr__() == expected_string), print_msg
""" Testing __mul__ method"""
expected_new_poly_mul = [2, 4, 6, 0]
poly1 = Polynomial([1, 2, 3, 0])
new_mul_pol = poly1 * 2
msg_mul = "Multiplaction did not return the expected polynimal. Expected: ", expected_new_poly_mul, " Calculated: ", new_mul_pol
assert (expected_new_poly_mul == new_mul_pol), msg_mul
def test_degree_polynomials3():
assert (p3.degree()) == 0
####### Define Test Repr. Method
def test_repr_polynomial():
assert practice.__repr__() == " 3x^3 + 4x^2 + 5x^1 + 6x^0"
####### Define Test Multiplication
def test_mult_polynomial():
assert (p5 * 5) == Polynomial([0, 5, 5, 0])
#print(test_eval_polynomial1())
#print(test_eval_polynomial2())
#print(test_eval_polynomial3())
print(test_add_polynomials())
print(test_subtract_polynomials())
print(test_degree_polynomials1())
print(test_degree_polynomials2())
print(test_degree_polynomials3())
print(practice.__repr__())
print(test_repr_polynomial(), ";")
print(test_repr_polynomial())
