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Commit eaff9c27 authored by Muhamed's avatar Muhamed
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negative strings and added setup method

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...@@ -2,6 +2,17 @@ ...@@ -2,6 +2,17 @@
#test no string #test no string
#test add 1 string #test add 1 string
#test adding 2 strings #test adding 2 strings
#add 3 strings
#add 4 strings
#add 6 strings
#\n statt , bei 2 strings
#\n statt , bei mehreren strings
# eine negative zahl
# mehrere negative zahlen
import unittest import unittest
class StringCalculator: class StringCalculator:
...@@ -9,25 +20,47 @@ class StringCalculator: ...@@ -9,25 +20,47 @@ class StringCalculator:
if not numbers: if not numbers:
return 0 return 0
else: else:
numbers = numbers.replace('\n',',')
number_list = numbers.split(',')#aufteilung der strings number_list = numbers.split(',')#aufteilung der strings
if len(number_list) ==1: negative=[] #array für die negativen nummern
return int(number_list[0])#bei einem string wird er in int umgewandelt total_sum = 0
elif len(number_list)==2: for number_str in number_list: #jedes element in der liste wird durch genommen
return int(number_list[0])+ int(number_list[1])#bei 2 strings wird beides in int verwandelt und die summe zurück gegeben(Position 1/0+Position 2/1) if number_str:
return 0 number = int(number_str)# summierung der integer
if number <0:
negative.append(number)
total_sum += number
if negative:
print(f"Negative Zahlen:{negative} ")#ausgabe negative zahlen
raise ValueError(f"negatives not allowed: {','.join(map(str, negative))}")
return total_sum
class TestStingCalculator(unittest.TestCase): class TestStingCalculator(unittest.TestCase):
def setUp(self):
self.calculator = StringCalculator()
def test_empty_string(self): def test_empty_string(self):
calculator = StringCalculator() self.assertEqual(self.calculator.add(""), 0) #leerer string + 0
self.assertEqual(calculator.add(""), 0) #leerer string + 0
def test_single_number(self): def test_single_number(self):
calculator = StringCalculator() self.assertEqual(self.calculator.add("5"),5) #eingabe von einem String
self.assertEqual(calculator.add("5"),5) #eingabe von einem String
def test_multiple_numbers(self): def test_multiple_numbers(self):
calculator=StringCalculator() self.assertEqual(self.calculator.add("5,5"),10)#eingabe mehrere strings
self.assertEqual(calculator.add("5,5"),10)#eingabe mehrere strings def test_unknowen_amount_of_numbers(self):
self.assertEqual(self.calculator.add("1,2,3"),6)
self.assertEqual(self.calculator.add("10,20,30,40"),100)
self.assertEqual(self.calculator.add("1,2,3,4,5,6"),21)
def test_numbers_seperated_by_newline(self):
self.assertEqual(self.calculator.add("1\n2"),3)
self.assertEqual(self.calculator.add("1\n2\n3"),6)
self.assertEqual(self.calculator.add("10,20\n30"),60)
def test_negative_number_exception(self):
with self.assertRaises(ValueError) as e:
self.calculator.add("-1,2")
self.assertEqual(str(e.exception), "negatives not allowed: -1")
if __name__=='__main__': if __name__=='__main__':
unittest.main() unittest.main()
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