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SOFTWARE TESTING by Peter Williams, Geoff Thompson, Angelina Samaroo, Peter Morgan, Brian Hambling

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GENERAL TESTING PRINCIPLES

Testing is a very complex activity, and the software problems described earlier highlight that it can be difficult to do well. We now describe some general testing principles that help testers, principles that have been developed over the years from a variety of sources. These are not all obvious, but their purpose is to guide testers, and prevent the types of problems described previously. Testers use these principles with the test techniques described in Chapter 4.

Testing shows the presence of bugs

Running a test through a software system can only show that one or more defects exist. Testing cannot show that the software is error free. Consider whether the top 10 wanted criminals website was error free. There were ...

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