ABSTRACT
Differential testing works by creating test suites for both the original system and the modified system and contrasting
both versions of the system with these two suites. Differential testing is made possible by recent advances in
automated unit test generation. The differential unit testing is one where developers would like to generate tests that
exhibit the behavioral differences between the two versions, if any differences exist. Differential unit tests (DUT) are a
combination of unit and system tests. DUTs retain some of the advantages of unit tests, can be automatically and
inexpensively generated, and have the potential for revealing faults related to intricate system executions. Some
examples of differential unit testing include regression testing, N-version testing, and mutation testing. Differential
testing discovered 21%, 34%, and 21% more behavior changes using regression testing techniques than using
regression testing alone.
Keywords: - Differential Unit Testing, System Testing, Test Cases, Unit Testing.