def test_derivative_of_term_with_coeficient_and_power_return_term_with_coeficient_equal_to_one(
self):
t = Term(1, 1)
res = t.derivative()
self.assertEqual(res, '1')
def test_derivative_of_term_with_coeficient_and_power_return_after_derivation(
self):
t = Term(2, 4)
res = t.derivative()
self.assertEqual(res, '8*x^3')
def test_adding_terms_reversed_in_polynomial_return_derivative(self):
term1 = Term(2, 0)
term2 = Term(3, 1)
term3 = Term(4, 2)
poly = Polynomial([term1, term2, term3])
res = poly.derivative()
self.assertEqual(res, '3+8*x')
def test_adding_terms_in_polynomial_return_derivative(self):
term1 = Term(2, 3)
term2 = Term(3, 1)
term3 = Term(1, 0)
term_1 = Term(1, 4)
term_2 = Term(10, 3)
poly1 = Polynomial([term1, term2, term3])
poly2 = Polynomial([term_1, term_2])
res1 = poly1.derivative()
res2 = poly2.derivative()
self.assertEqual(res1, '6*x^2+3')
self.assertEqual(res2, '4*x^3+30*x^2')
def test_convert_string_into_term_with_constant_and_variable_with_power(
self):
s = '3*x^4'
res = Term.convert_into_term(s)
self.assertEqual(res, ('3', '4'))
def test_adding_one_term_which_is_coefficient_and_variable_in_polynomial_return_derivative_constant(
self):
term1 = Term(2, 1)
poly = Polynomial([term1])
res = poly.derivative()
self.assertEqual(res, '2')
def test_adding_one_term_which_is_constant_in_polynomial_return_derivative_zero(
self):
term1 = Term(2, 0)
poly = Polynomial([term1])
res = poly.derivative()
self.assertEqual(res, '0')
def test_convert_string_into_term_with_only_one_constant(self):
s = '3'
res = Term.convert_into_term(s)
self.assertEqual(res, ('3', '0'))
def test_representing_the_term_as_string(self):
t = Term(2, 3)
self.assertEqual(str(t), '2*x^3')
def test_derivative_of_term_with_coeficient_and_power_equal_to_zero(self):
t = Term(5, 0)
res = t.derivative()
self.assertEqual(res, '0')
def test_derivative_of_term_with_coeficientequal_to_one(self):
t = Term(1, 3)
res = t.derivative()
self.assertEqual(res, '3*x^2')