A test case specifies inputs, conditions, and expected results so a team can check whether software behaves as intended. Test cases belong in a wider quality assurance (QA) process: plan what needs checking, design tests, execute them, and report what happened. Documenting that process helps teams test consistently and remain accountable across projects. section 6.4.2
Use complementary approaches rather than expecting one kind of test to catch everything:
- Unit testing uses automated checks to find problems at the code level. section 6.4.2
- Integration testing checks interactions between parts of a system. section 6.4.2
- Manual testing brings a human perspective, including whether the user experience matches requirements. section 6.4.2
Choose where to invest effort. For a new application whose internals may change, integration or end-to-end tests can be a practical early choice; detailed unit tests may need repeated rewriting. That does not make unit tests unhelpful: automated unit checks and manual testing serve different purposes. Review recurring defects and regression failures to decide what needs better coverage. section 6.5.3 section 7.4.3
A fragile deployment pipeline
A team’s deployment pipeline broke often and had few automated tests. A lead developer added a testing framework to the pipeline and wrote additional tests. Running those checks during deployment made the pipeline more resilient and reduced bugs reaching production. section 6.5.1
Make testing a planned team responsibility, not a task squeezed in at the deadline. QA specialists bring skills that help teams document practices and find problems early. Keep testing thorough alongside code reviews, and protect time for both when planning delivery. section 6.1 section 12.2.2
