8. Exceptions and Assertions

1. Review presentation Exceptions and assertions

   Practical exercise

2. Investigate jtm.activity08 package
3. Create class SimpleCalcException as a subclass of Exception
4. Implement following constructors for this class:
   1. SimpleCalcException(String string)
   2. SimpleCalcException(String string, Throwable cause)

5. Implement basic mathematical operations for SimpleCalc class with int numbers in range of [-10..+10] (including) to pass unit tests

    Notes

   1. Input range is checked using assertions (so if they are disabled, inputs can be any int)
   2. Outputs are always checked and exception is thrown if it is outside allowed range
   3. Only SimpleCalcExceptions may be thrown. AssertionErrors have to be caught and wrapped into SimpleCalcExceptions

Additional information

• De Morgan's laws