Download A Practical Guide to Testing Object-Oriented Software by John D. McGregor PDF

By John D. McGregor

A pragmatic consultant to checking out Object-Oriented software program makes a speciality of the real-world concerns that come up in making plans and enforcing powerful checking out for object-oriented and component-based software program improvement. It indicates how checking out object-oriented software program differs from trying out procedural software program and highlights the original demanding situations and possibilities inherent in object-oriented software program trying out. The authors show how object-oriented software program improvement permits checking out to be built-in into every one degree of the method - from defining requisites to method integration - leading to a smoother improvement approach and the next finish caliber. As they stick to this strategy, they describe what to check at every one level in addition to provide experienced-based checking out innovations. you'll find details on such very important subject matters as: checking out research and layout versions, together with settling on try out circumstances to lead layout inspections trying out elements, frameworks, and product traces The checking out demanding situations of inheritance and polymorphism how you can devise an efficient checking out technique trying out sessions, together with developing a try driving force and try out suites trying out item interactions, overlaying sampling try out situations, off-the-shelf parts, protocol trying out, and try styles checking out classification hierarchies, that includes subclass try requisites checking out allotted gadgets, together with threads, existence cycle trying out, and internet server checking out checking out structures, with details on pressure, existence cycle, and function checking out One accomplished instance runs through the booklet to illustrate trying out thoughts for every level of improvement. additionally, the ebook highlights vital questions that testers should still ask while confronted with particular checking out projects. The authors recognize that checking out is usually considered as an important evil, and that assets allotted to checking out are frequently restricted. With that during brain, they current a priceless repertoire of trying out concepts from that you may decide on those who suit your price range, agenda, and wishes.

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Extra resources for A Practical Guide to Testing Object-Oriented Software

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Design products are primarily an extension of analysis products and implementation products are coded expressions of design products. The products of one increment are extended and refined in the next increment. This is also a strength of the paradigm with respect to testing because we can utilize refinements of the same test cases in testing refined models. The incremental development of products requires the incremental testing of those products. Products can change from increment to increment in both planned and unplanned ways.

It is possible to write templated drivers for testing many parts of templates. Abstraction We have referred to the concept of abstraction throughout this chapter. Abstraction is the process of removing detail from a representation. Abstraction allows us to look at a problem or its solution in various levels of detail, thereby letting us leave out any considerations that are irrelevant to the current level of interest. Object-oriented technologies make extensive use of abstraction for example, the root class in an inheritance hierarchy models a concept more abstract than its descendents.

Each class uses instances of other classes to provide parts of its implementation. These instances, along with the parameters to messages, make up most of the relationships among objects. Testing actual code has been the principal concern of most traditional testing efforts and is the focus of most chapters in this book. Source code can be tested as it is developed, component by component, or as a completed product at the end of development. The major issues to be addressed are: • Who tests. Testing can be done by developers, who adopt a testing perspective toward their own code.

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