Automated Expected Output Generation

What is the importance of automated test data generation? This question is of concern for the entire software community. We want to know the meaning and usefulness of automated test data generation. Is it related to design of test cases or execution of already designed test cases or both? How can we generate expected output using automated test data generation technique? This is a weak area and limits the applicability of automated testing. The test case creation, execution and evaluation are three distinct activities. The execution and evaluation of test cases can be easily automated, but creation needs expected output that is difficult to automate due to its dependency on functionality of the program. This paper addresses the significance of techniques and tools available for automated test data generation. In this work, we analyze and assess the existing techniques for automated expected output generation and discuss the practical significance of these techniques.