#Source Allies University #TDD Workshop ##New Code Exercise ###Setup

• Java SDK 6 or above
• Intellij IDEA Community Edition
• jUnit 4

###Test Drive Creating a Calculator

• Create a Calculator class with an Add method.
• The method can take 0, 1 or 2 numbers, and will return their sum.
• For example: “” or “1” or “1,2”.
• For an empty string it will return Zero.
• Allow the Add method to handle an unknown amount of numbers.  

##Legacy Code Exercise ###Setup

• Java SDK 6 or above
• Intellij IDEA Ultimate Edition
• jUnit 4
• Mockito 1.9
• CDI: Context and Dependency Injection plugin for Intellij IDEA Ultimate Edition

###Test Drive Refactoring an Existing Class

• Create a String Calculator class with an Add method that takes in Strings.
• Utilize CDI to inject the String Calculator into the Calculator.
• Have the Calculator class delegate to the String Calculator class.

###Optional

• Create a Numeric Calculator class with an Add method.
• Utilize CDI to inject the Numeric Calculator into the Calculator.
• If the Add method is called with string parameters, delegate to the String Calculator; if the Add method is called with numeric parameters, delegate to the Numeric Calculator.