Sends messages to the B-unit test engine to execute the test logic. The commands element contains all of the commands that are sent into the engine when the B-unit test executes. These elements should be thought of as active in the sense that they are actions taken by B-unit when it starts the test. Each command is executed in sequence. If the command has an
attribute then this command is executed on a separate thread. The B-unit test is considered completed when all commands complete. The most common command is the sendMessage command and is the only required command for each B-unit.