Test Scenario
A test scenario is a high-level description of something to be tested — "verify a user can reset their password" — that later gets broken down into one or more detailed test cases covering the specific steps, data, and expected results. Scenarios describe what to test; test cases describe exactly how.
The scenario-to-test-case relationship is one-to-many: a single scenario like "verify checkout works" might expand into a dozen test cases — valid card, expired card, out-of-stock item, applied coupon, guest checkout, and so on — once someone sits down to actually write out the detail.
Scenarios are useful early in test planning — they're fast to brainstorm in a group session and easy for non-technical stakeholders to review, since they read like plain user goals rather than technical steps. A common approach is to derive scenarios directly from use cases or user stories, then only write full test cases for the scenarios that actually need scripted, repeatable coverage.
