关键词: 单元测试用例修复, 方法声明演化, 反射机制, 符号化执行

Abstract: Some of test cases may become obsolete because of software system evolution. Discarding these test cases will weaken fault detection ability, and reduce the effectiveness of regression testing. Automatically repairing test cases can reduce the maintenance workload of developers, and improve the efficiency of regression testing. This paper proposes a method for automatically repairing test cases that become obsolete because of the changes in method declarations. Firstly, the information of method declaration changes is got by using reflection mechanism. Then, the declaration change types, such as method name change, method parameters change and method return type change, are identified. Finally, different repairing strategies are put forward for different declaration change types. When repairing test cases, some of test data are obtained by using dynamic symbolic execution tool, which can expand the range of test case repairing. The experiment shows that the proposed method can repair nearly 60% obsolete test cases because of method declaration change, this proves the feasibility of the proposed method.

Key words: unit test case repairing, method declaration evolving, reflection mechanism, symbolic execution