Software Testing Strategies University of （大学的软件测试策略）.pptVIP

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Software Testing Strategies University of （大学的软件测试策略）.ppt

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Software Testing Strategies University of （大学的软件测试策略）

Software Testing Strategies CIS 375 Bruce R. Maxim UM-Dearborn Strategic Approach to Testing - 1 Testing begins at the component level and works outward toward the integration of the entire computer-based system. Different testing techniques are appropriate at different points in time. The developer of the software conducts testing and may be assisted by independent test groups for large projects. The role of the independent tester is to remove the conflict of interest inherent when the builder is testing his or her own product. Strategic Approach to Testing - 2 Testing and debugging are different activities. Debugging must be accommodated in any testing strategy. Need to consider verification issues are we building the product right? Need to Consider validation issues are we building the right product? Strategic Testing Issues - 1 Specify product requirements in a quantifiable manner before testing starts. Specify testing objectives explicitly. Identify the user classes of the software and develop a profile for each. Develop a test plan that emphasizes rapid cycle testing. Strategic Testing Issues - 2 Build robust software that is designed to test itself (e.g. use anti-bugging). Use effective formal reviews as a filter prior to testing. Conduct formal technical reviews to assess the test strategy and test cases. Stages of Testing Module or unit testing. Integration testing, Function testing. Performance testing. Acceptance testing. Installation testing. Unit Testing Program reviews. Formal verification. Testing the program itself. black box and white box testing. Black Box or White Box? Maximum # of logic paths - determine if white box testing is possible. Nature of input data. Amount of computation involved. Complexity of algorithms. Unit Testing Details Interfaces tested for proper information flow. Local data are examined to ensure that integrity is maintained. Boundary conditions are tested. Basis path testing should be used. All error handling paths should b