Use Case Testing
Nowadays, object-oriented programming often uses design technology, called the design of use cases. Use cases specify the interaction of individual elements with each other according to a specific scenario. Popular scenarios in use cases outline business-logic of most projects. Mapping use cases to scenarios you understand that there many use case formats in use in various projects. Do use case diagrams affect their frequency of use? The usage rates can be expressed as a percentage of the total number of use cases. Given this information about the product design, rapid testing experts can allocate more than 50% of the time spent on test cases design, for less than 50% of the code that is used most frequently, i.e. for popular use cases.
Another similar approach is to probe the DD branches. After the probes are inserted into the code, you need to perform a large number of test cases and sort the received log files of execution path by the probe numbers. The number of tests is specified based on project requirements, data flows and possible user experience to actual systems in the production run. DD-branches which probe numbers are most often encountered make an empirical forecast of frequencies of main use. The described process refers to rapid-testing technology, because its purpose is to save time and increase the efficiency of error detection. What could be worse than when several testers spend a lot of time developing test cases for several paths of a new code fragment, just to find out that the code is non-executable and therefore cannot be tested? Or, say, essentially, the new code is executable, but it is executed only when some unimportant condition is satisfied. What a senseless waste of time and resources with zero efficiency, because no error is detected!
Designing use cases and predicting the frequency of use of each allows you to determine the priorities of test cases. For the resources and effectiveness of testing to be optimized, these priorities should be the basis for developing test cases and the sequence in which they are run.
Before applying a case-based approach to testing, testers and developers must ensure that use cases satisfy the requirements and are appropriate for the code. The discrepancy between the requirements document and the code is often identified during testing of many software projects. Some organizations do not pay so much attention to software documentation less as they do to user documentation.
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