Software QA Outsourcing: Integration Testing in Procedural Programming
The process of building a test suite in the structured testing is determined by the principle used to design Program Graph Models (PGM). This affects many test paths and generation of tests corresponding to the relevant test paths.
The first approach to software development is a procedural (modular) programming. Traditional procedural programming involves writing the source code in an imperative style prescribing certain sequence of commands, as well as describing a software project using functional decomposition.
Languages such as Pascal and C are mandatory for the programming. In these languages, the order of source lines of the code determines the sequence of control transfer, including consistent implementation, the choice of conditions and re-execution of the program’s areas.
Each module has a number of entry points (if the code is written in static strict type style – only one) and multiple exit points (if the code is written in static strict type style – only one). Complex software projects have a modular-hierarchical structure, and unit testing is the initial step of a software testing process. Construction of the graph model of the module is a trivial task, and testing is almost always carried out based on branch coverage criterion C1, i.e., each arc and each vertex of the module must be contained at least in one of the test paths.
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Thus, M (R, C1) = E Nj_j, where E – the set of arcs and N ^ j – PGM input peaks.
The complexity of the testing module according to the criterion C1 is expressed by the adjusted formula to assess McCabe’s cyclomatic complexity
V (F, Cl) = q + kin, where q – the number of binary choices for branch conditions, a kin – the number of inputs to the graph.
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Integration testing primarily focuses on considering the program model built using the control flow diagrams. Also, this testing controls communication through the data produced and used by other groups of programs interacting with the group under test. Each variable of inter-module interface is tested for identity of descriptions in interacting modules, as well as for compliance with the original software specifications. Composition and structure of information communications of implemented group of modules are checked for compliance with the requirements specification for this group. All implemented communications should be identified, arranged and summarized.
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