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PySys x64 has been designed to provide a generic extensible framework for the organisation and execution of system level testcases. It provides a clear model of what a testcases is, how it is structured on disk, how it is executed and validated, and how the outcome is reported for test auditing purposes.

Testcases are instances of a base test class (pysys.basetest.BaseTest) which provides core functionality for cross platform process management and manipulation; in this manner an application under test (AUT) can be started and manipulated directly within the testcase. The base test class additionally provides a set of standard validation techniques based predominantly on regular expression matching within text files (e.g. stdout, logfile of the AUT etc). Testcases are executed through a base runner (pysys.baserunner.BaseRunner) which provides the mechanism to control testcase flow and auditing. In both cases the base test and runner classes have been designed to be extended for a particular AUT, e.g. to allow a higher level of abstraction of AUT manipulation, tear up and tear down prior to executing a set of testcases etc.