Seven Principles of Software Testing

Software testing is used to assess the quality of computer software. It is an empirical technical investigation conducted to provide stakeholders with information about the quality of the product or service under test, with respect to the context in which it is intended to operate. A characteristic of testing as practiced in software is the deplorable propensity of previously corrected faults to resuscitate. The hydra's old heads, thought to have been long cut off, pop back up. This phenomenon is known as regression and leads to regression testing. A test run is only useful if you can unambiguously determine whether it passed. The criterion is called a test oracle. Manual tests are good at depth: They reflect developers' understanding of the problem domain and data structure. Automatic tests are good at breadth: They try many values, including extremes that humans might miss. Testing research is vulnerable to a risky thought process