To work with the individual test cases for a specific rule, use the Test Cases tab of the rule form for that rule.
Test cases save both the test data and the results of that test data. When you run a test case, Pega 7 Platform uses the saved test data to run the rule and then compares the results to those saved in the test case. If the results do not match, you investigate the tested rule to see what changed and determine whether there is a problem to be resolved.