Unit testing data model rules Unit test data model rules, such as data pages and data transforms. Unit testing a data page Test a data page to ensure that you get the expected results by using the Run Rule feature before testing it in the context of the application that you are developing. Additionally, you can convert the test run into a Pega unit test case for reuse. Unit testing a data transform You can use the Run Rule feature to test a data transform individually before testing it in the context of the application that you are developing. Additionally, you can convert the test run into a Pega unit test case. Viewing test cases for a data type You can view, run, and add test cases for a data type in the Data Designer.