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Commit 49040a73 authored by Hatice Yildirim's avatar Hatice Yildirim
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Feature3 implementiert: 1 Testfall

parent b0e2d9ad
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from abc import ABC, abstractmethod
import unittest
class IStringCalculator(ABC):
@abstractmethod
def add(self, numbers: str) -> int:
pass
class StringCalculator(IStringCalculator):
def add(self, numbers: str) -> int:
if not numbers:
return 0
# Ersetze Zeilenumbrüche durch Kommas und teile die Eingabe nach Kommas
numbers = numbers.replace("\n", ",")
# Splitte die Zahlen und prüfe auf negative Zahlen
nums = numbers.split(',')
negatives = [num for num in nums if int(num) < 0]
if negatives:
# Wenn negative Zahlen vorhanden sind, werfe eine Ausnahme
raise ValueError(f"Negatives not allowed: {', '.join(negatives)}")
# Berechne die Summe der positiven Zahlen
return sum(map(int, nums))
class TestStringCalculator(unittest.TestCase):
def setUp(self):
self.calculator = StringCalculator()
def test_empty_string(self):
self.assertEqual(self.calculator.add(""), 0)
def test_single_number(self):
self.assertEqual(self.calculator.add("1"), 1)
def test_two_numbers(self):
self.assertEqual(self.calculator.add("1,2"), 3)
def test_multiple_numbers(self):
self.assertEqual(self.calculator.add("1,2,3,4,5"), 15)
def test_numbers_with_newline(self):
self.assertEqual(self.calculator.add("1\n2,3"), 6)
def test_numbers_with_multiple_newlines(self):
self.assertEqual(self.calculator.add("1\n2\n3\n4\n5"), 15)
def test_negative_number(self):
with self.assertRaises(ValueError) as context:
self.calculator.add("1,-2,3")
self.assertEqual(str(context.exception), "Negatives not allowed: -2")
def test_multiple_negative_numbers(self):
with self.assertRaises(ValueError) as context:
self.calculator.add("1,-2,-3,4")
self.assertEqual(str(context.exception), "Negatives not allowed: -2, -3")
if __name__ == "__main__":
unittest.main()
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