课程总览
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什么叫 bug
- Software Fault : A static defect in the software (i.e., defect) 静态错误
- Software Error : An incorrect internal state that is the manifestation of some fault 状态错误
- Software Failure : External, incorrect behavior with respect to the requirements or other description of the expected behavior 输出行为错误
PIE 模型
- Execution: The location or locations in the program that contain the fault must be reached
- Infection : The state of the program must be incorrect
- Propagation : The infected state must propagate to cause some output of the program to be incorrect
Bug 空间聚集
故障通常聚在一起。
测试的局限性
输入空降庞大：无法穷举所有输入
实现逻辑复杂：无法想到所有场景
测试语言未知：无法判定测试的预期输出
发现的 Bug 类型
- 断言失败
- 异常崩溃
- 无效输入
- 错误输出
