Based on input from the test designer identify and specify test-specific classes and packages in the design model.

A driver or stub of a design class has the same methods as the original class, but there is no behavior defined for the methods other than to provide for input (to the target for test) or returning a pre-defined value (to the target for test).

A driver or stub of a design package contains simulated classes for the classes that form the public interface of the original package.

Identify what behavior is needed to make your test automation tool communicate with your target for test in an efficient way. Identify and describe the appropriate design classes and packages.

To automate test procedures for which there is no automation tool, identify the appropriate design classes and packages. Use the test cases and the use cases they derive from as input.