Relation Between Software Development and Software Testing Phases | The V Model

software testing 8:55 pm on January 12, 2010 | Answers: 1    
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• software testing 8:56 pm on January 12, 2010
  

  Testing is planned right from the URD (User Requirement Document) stage of the SDLC. The following table indicates the planning of testing at respective stages. For projects of tailored SDLC, the testing activities are also tailored according to the requirements and applicability.

  

  Lets go through all Software Testing phases.

  Unit Testing

  As per the “V” diagram of SDLC, testing begins with Unit testing. Unit testing makes heavy use of White Box testing techniques, exercising specific paths in a unit’s control structure to ensure complete coverage and maximum error detection.

  Unit testing focuses verification effort on the smallest unit of software design – the unit. The units are identified at the detailed design phase of the software development life cycle, and the unit testing can be conducted parallel for multiple units. Five aspects are tested under Unit testing considerations:

  - The module interface is tested to ensure that information properly flows into and out of the program unit under test.

  - The local data structure is examined to ensure that data stored temporarily maintains its integrity during all steps in an algorithm’s execution.

  - Boundary conditions are tested to ensure that the module operates properly at boundaries established to limit or restrict processing.

  - All independent paths (basis paths) through the control structure are exercised to ensure that all statements in a module have been executed at least once.

  - And finally, all error-handling paths are tested.

  Unit Test Coverage Goals:

  1. Path Coverage:

  Path coverage technique is to verify whether each of the possible paths in each of the functions has executed properly. A path is a set of branches of possible flow. Since loop introduces unbounded number of paths, the path coverage technique employs a test that considers only a limited number of looping possibilities.

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