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42 lines
2.9 KiB
Python
42 lines
2.9 KiB
Python
import unittest
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from arithmetic_arranger import arithmetic_arranger
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# the test case
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class UnitTests(unittest.TestCase):
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def test_arrangement(self):
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actual = arithmetic_arranger(["3 + 855", "3801 - 2", "45 + 43", "123 + 49"])
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expected = " 3 3801 45 123\n+ 855 - 2 + 43 + 49\n----- ------ ---- -----"
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self.assertEqual(actual, expected, 'Expected different output when calling "arithmetic_arranger()" with ["3 + 855", "3801 - 2", "45 + 43", "123 + 49"]')
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actual = arithmetic_arranger(["11 + 4", "3801 - 2999", "1 + 2", "123 + 49", "1 - 9380"])
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expected = " 11 3801 1 123 1\n+ 4 - 2999 + 2 + 49 - 9380\n---- ------ --- ----- ------"
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self.assertEqual(actual, expected, 'Expected different output when calling "arithmetic_arranger()" with ["11 + 4", "3801 - 2999", "1 + 2", "123 + 49", "1 - 9380"]')
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def test_too_many_problems(self):
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actual = arithmetic_arranger(["44 + 815", "909 - 2", "45 + 43", "123 + 49", "888 + 40", "653 + 87"])
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expected = "Error: Too many problems."
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self.assertEqual(actual, expected, 'Expected calling "arithmetic_arranger()" with more than five problems to return "Error: Too many problems."')
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def test_incorrect_operator(self):
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actual = arithmetic_arranger(["3 / 855", "3801 - 2", "45 + 43", "123 + 49"])
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expected = "Error: Operator must be '+' or '-'."
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self.assertEqual(actual, expected, '''Expected calling "arithmetic_arranger()" with a problem that uses the "/" operator to return "Error: Operator must be '+' or '-'."''')
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def test_too_many_digits(self):
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actual = arithmetic_arranger(["24 + 85215", "3801 - 2", "45 + 43", "123 + 49"])
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expected = "Error: Numbers cannot be more than four digits."
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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."')
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def test_only_digits(self):
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actual = arithmetic_arranger(["98 + 3g5", "3801 - 2", "45 + 43", "123 + 49"])
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expected = "Error: Numbers must only contain digits."
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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."')
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def test_solutions(self):
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actual = arithmetic_arranger(["32 - 698", "1 - 3801", "45 + 43", "123 + 49"], True)
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expected = " 32 1 45 123\n- 698 - 3801 + 43 + 49\n----- ------ ---- -----\n -666 -3800 88 172"
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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`.')
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if __name__ == "__main__":
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unittest.main() |