Positive vs. negative testing: Differences and examples | TechTarget

▤ Summary

When testers approach a new project, they immediately think about testing the main user workflow or happy path. For example, a tester might point out that acceptance criteria need to be added or amended to include appropriate error messages. As much as both positive and negative testing are equally important and should be included throughout the development process, executing both is time-consuming, expensive and not always necessary. Since negative tests can be destructive (e.g., creating errors and forcing the software to fail), they are not used in post-production deployment checkouts or in production environments. Testers exercise error conditions and use these to assess how gracefully the system handles erroneous input.

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