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_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 arithemetic problems and a second argument of `True`.' )
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."' )
# This entrypoint file to be used in development. Start by reading README.md from app import arithmetic_arranger from unittest import main print(arithmetic_arranger(["32 + 698", "3801 - 2", "45 + 43", "123 + 49"])) # Run unit tests automatically main(module='test_module', exit=False)