What is an equivalence class?
An equivalence class is any set of input data and conditions that execute a common set of business rules, modules, files, etc. Each test situation can be different, but if the result that you are evaluating is achievable with a variety of different test cases, those test cases form an equivalence class. You can test any single member of the class and evaluate the systems’ reaction to the entire class. We present how to identify and use equivalence classes in your testing in our workshop How to Test Business Information Systems.
