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non-incremental (big-bang) unit testing

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Definition

Non-incremental testing, also known as big-bang testing, is a white-box testing approach where all components or modules of a system are integrated simultaneously (or tested in sequence and then combined), and the entire system is tested as a whole. Unlike incremental or integration testing, which involves integrating and testing components or modules incrementally, non-incremental testing takes a more holistic approach to testing the entire system at once.

  • the single units of the system are ignored until they are all combined together

Advantages

  • do not require a specific programmation or organization, since the whole system is studied as a whole
  • useful to detect bugs that emerges while combining different functions or classes
  • faster than an incremental approach
graph TD;
    A-->B;
    A-->C;
    A-->D;
    B-->E;
    C-->F;
    D-->G;
    E-->H;
    F-->H;
    G-->H;

A test is performed on the whole system, providing an input to (A) and analyzing the output (H) against a test oracle.

Warning

May be difficult to localize and identify the origin of an issue, since the whole system is targeted. The process is computationally expensive, especially if the system is a large scale application

References

https://www.geeksforgeeks.org/introduction-to-non-incremental-testing/ 05 Module (Unit) Testing (p.98)

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