First Test For Empty String Returns Zero Ha Failed , Red
Second Test Passed , Green  , Change To 0 In The If
3 Tst Has Failed , Single Number Has Return , Red
Test Has Passed , Green
Refactoring , New Object Will Be Created For Each Method
Check Validations After Refactor
Two Numbers Sum Test Has Failed , Red
Two String Sum Test Has Passed . Green
Refactor String To Int In A Method
Check Validation After Refactor
Two Nmber Sum With A New Line Test Has Faild , Red
Two Numbers Sum With A New Line Test Has Passed ,Green , Added |\n
Refactor Two Numbers Sum In A New Method
Test After Refactor Green
Negative Value Test Failed , Red
Negative Exeption Test Has Passed , Green
Refactor And Test After Refacor Has Paased , Green