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Designing Test Cases A test case is a detailed procedure that fully tests a feature or an aspect of a feature. Whereas the test plan describes what to test, a test case describes how to perform a particular test. You need to develop a test case for each test listed in the test plan. A test case includes: The purpose of the test. Special hardware requirements, such as a modem. Special software requirements, such as a tool. Specific setup or configuration requirements. A description of how to perform the test. The expected results or success criteria for the test. Test cases should be written by a team member who understands the function or technology being tested, and each test case should be submitted for peer review. Organizations take a variety of approaches to documenting test cases; these range from developing detailed, recipe-like steps to writing general descriptions. In detailed test cases, the steps describe exactly how to perform the test. In descriptive test cases, the t...

Equivalence partitioning: Equivalence partitioning is a method for deriving test cases. In this method, classes of input conditions called equivalence classes are identified such that each member of the class causes the same kind of processing and output to occur. In this method, the tester identifies various equivalence classes for partitioning. A class is a set of input conditions that are is likely to be handled the same way by the system. If the system were to handle one case in the class erroneously, it would handle all cases erroneously. Equivalence partitioning drastically cuts down the number of test cases required to test a system reasonably. It is an attempt to get a good 'hit rate', to find the most errors with the smallest number of test cases. To use equivalence partitioning, you will need to perform four steps: Determining conditions to be Tested Defining Tests Designing test cases Identifying Final set of Test Cases Defining Tests A number of items must be cons...