Chapter 9

The Test Suite Tool

DrScheme makes it easy to separate program source from test suites. For instance, consider the same program as before:

Because the REPL clears on each Execute, it becomes tedious to repeatedly type comments to test the program. The Test Suite Tool alleviates this burden. To create a new test suite, select File | New Test Suite. In the ensuing window, click New to add a new test case. You can write arbitrary expressions in each Call and Expected box. Clicking Execute in this window runs the test cases and reports on their success:

If you commit an error in one of these expressions, DrScheme will still provide a helpful error message:

The Test Suite Tool supports more advanced features, such as specifying the predicate to use for testing. Look up the documentation on the drschemeThe Test Suite WindowTest Suite Tool for more information.