def test_arrangement(self): actual = arithmetic_arranger( ["3 + 855", "3801 - 2", "45 + 43", "123 + 49"]) expected = ( " 3 3801 45 123\n+ 855 - 2 + 43 + " "49\n----- ------ ---- -----") self.assertEqual( actual, expected, "Expected different output when calling " '"arithmetic_arranger()" with ["3 + 855", "3801 - 2", ' '"45 + 43", "123 + 49"]', ) actual = arithmetic_arranger( ["11 + 4", "3801 - 2999", "1 + 2", "123 + 49", "1 - 9380"]) expected = ( " 11 3801 1 123 1\n+ 4 - 2999 + 2 " " + 49 - 9380\n---- ------ --- ----- ------") self.assertEqual( actual, expected, "Expected different output when calling " '"arithmetic_arranger()" with ["11 + 4", "3801 - 2999", ' '"1 + 2", "123 + 49", "1 - 9380"]', )
def test_only_digits(self): actual = arithmetic_arranger( ["98 + 3g5", "3801 - 2", "45 + 43", "123 + 49"]) expected = "Error: Numbers must only contain digits." self.assertEqual( actual, expected, 'Expected calling "arithmetic_arranger()" with a problem ' "that contains a letter character in the number to return " '"Error: Numbers must only contain digits."', )
def test_too_many_digits(self): actual = arithmetic_arranger( ["24 + 85215", "3801 - 2", "45 + 43", "123 + 49"]) expected = "Error: Numbers cannot be more than four digits." self.assertEqual( actual, expected, 'Expected calling "arithmetic_arranger()" with a problem ' 'that has a number over 4 digits long to return "Error: ' 'Numbers cannot be more than four digits."', )
def test_incorrect_operator(self): actual = arithmetic_arranger( ["3 / 855", "3801 - 2", "45 + 43", "123 + 49"]) expected = "Error: Operator must be '+' or '-'." self.assertEqual( actual, expected, '''Expected calling "arithmetic_arranger()" with a problem that uses the "/" operator to return "Error: Operator must be '+' or '-'."''', )
def test_too_many_problems(self): actual = arithmetic_arranger([ "44 + 815", "909 - 2", "45 + 43", "123 + 49", "888 + 40", "653 + 87" ]) expected = "Error: Too many problems." self.assertEqual( actual, expected, 'Expected calling "arithmetic_arranger()" with more than ' 'five problems to return "Error: Too many problems."', )
def test_solutions(self): actual = arithmetic_arranger( ["32 - 698", "1 - 3801", "45 + 43", "123 + 49"], True) expected = ( " 32 1 45 123\n- 698 - 3801 + 43 + " "49\n----- ------ ---- -----\n -666 -3800 88 " " 172") self.assertEqual( actual, expected, "Expected solutions to be correctly displayed in output when " 'calling "arithmetic_arranger()" with arithmetic problems and' " a second argument of `True`.", )