面向回归测试的代码变更影响度量模型

软件待测版本相对上一个版本的代码变更，会对已有特性带来潜在的质量风险，这一风险水平直接与回归测试用例的优先级相关联.回归测试设计过程中的一个重要问题是如何衡量代码变更对回归测试用例优先级的影响.本文在回归测试用例优先级评估模型的基础上，从测试覆盖的角度建立起回归测试用例与代码变更的直接关联，从代码整体耦合性的角度建立起回归测试用例与代码变更的间接关联，分析了代码变更对回归测试的显性影响和隐性影响，进而结合回归测试用例优先级的评估要求提出了一个新的度量模型.实验结果显示，使用该模型度量代码变更对回归测试用例优先级的影响水平，可以得到比较全面和客观的定量结果，从而为回归测试用例优先级的评估提供有效的支持.

Code Change Impact Metric Model for Regression Test

Code change which introduces risk in software quality is associated with regression test case prioritization. It is an important topic that evaluates the code change impact on regression test case prioritization, which plays a significant role in software quality assurance. This study analyzes the relationship between regression test case and code change from a test coverage and coupling perspective based on the test case prioritization evaluating model, and presents a new code change impact metric model which introduces both the dominant and recessive impact level. Experiments indicate that, the quantitative metric results of code change impact to regression test cases prioritization computed by this model are comprehensive and objective, and could provide effective support for regression test case prioritization evaluation.