It abstracts away most concerns having to do with the execution of tests in isolated (possibly remote) domains.

The basic usage pattern of a test runner is as follows:

• As a precondition, ensure that the runtime environment has been initialized.
• Create the test runner.
• Add event handlers and register extensions. ,
• Initialize the runner.
• Explore and/or Run the tests. and
• Dispose the test runner.
• Save or format the report contents as required using the reporting APIs.

Multiple test runs may be performed between initialization and disposal of the test runner.