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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In computer science, test stubs are programs which simulate the behaviors of software components (or modules) that are the dependent modules of the module being tested. Consider a software program which queries a database to obtain the sum price total of all products stored in the database. However, the query is slow and consumes a large number of system resources. This reduces the number of test runs per day. Secondly, the tests need to be conducted on values larger than what is currently in the database. The method (or call) used to perform this is get_total. For testing purposes, the source code in get_total could be temporarily replaced with a simple statement which returned a specific value. This would be a test stub. There are several testing frameworks available and there is software that can generate test stubs based on existing source code and testing requirements.
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