Test Writing: Person Whisperer

Created By: Geoffrey Challen

/ Version: 2021.2.0

Define a public class Whisperer that provides a single class method named whisper. whisper should accept a single Person instance and return a String. If the person is:

• a Student you should return the result of calling hey()
• a Staff you should return the result of calling help()
• a Professor you should return the result of calling hello()
• otherwise return null.

You will need to downcast the passed Person appropriately in order to access and call the methods as described above.

Test Design Challenge

You're challenge is to write tests for this problem described above.

• Provide a public class named TestWhisperer with a single non-private class method named test that accepts no arguments and does not return a value.
• If the implementation of the class described above is incorrect, your test method should throw an exception.
• If it is correct, do not throw an exception.
• You may want to use Java's assert method