The goal of regression testing is to ensure that a change to the system hasn't broken existing functionality.
回归测试的目标是确保对系统的变更没有破坏现有的功能。
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The goal of developer testing is to ensure that newly written or modified code works as intended and doesn't cause "regression" (ie, the inadvertent breaking of previously working code).
Based on the criterion of deviation squares sum, a general forecasting equation is set up by using goal programming. It has advantages over the analysis of multi-variable linear regression.