Separation of JUnit classes into special test package?

Question

I am learning the concepts of Test-Driven Development through reading the Craftsman articles (click Craftsman under By Topic) recommended in an answer to m

Answer 1

I put my test classes in the same package as what they are testing but in a different source folder or project. Organizing my test code in this fashion allows me to easily compile and package it separately so that production jar files do not contain test code. It also allows the test code to access package private fields and methods.