Abstract: A test system for software includes a test case generator, which produces test cases, and a test framework, which executes the test cases. The test case generator represents test cases as actions to be performed. Actions for inclusion in a test case are selected by a rule-based inference engine applying user specified rules based on a test scenario. The test scenario may be determined in part based on user input and in part based on the current state of the software under test. Code to perform the actions is separately provided as a set of action handlers. The test framework maps the actions specified as part of the test case to action handlers and supplies parameters to the action handlers. The test system simplifies the development and maintenance of test cases and allows more through testing of software.