Test case

A test case is a set of steps, input data and expected results used to check that one specific behaviour of a system works. Good test cases are clear enough that anyone on the team can run them and agree on whether the result passed or failed.

What a test case contains

• An ID and a short title.
• Preconditions, such as the user being logged in.
• Test steps and test data.
• The expected result.
• After the run, the actual result and a status: pass, fail or blocked.

Tips for writing them

• Test one behaviour per case, so a failure points to one problem.
• Cover negative and edge cases, not only the happy path.
• Link each case to the requirement or user story it checks.
• AI assistants can draft cases from acceptance criteria, but a tester should review every one.

Read the full guide: How to Write Test Cases with AI — Complete 2026 Guide for SDETs