name: test-design description: "Design test plans and test cases for new features or changes, covering boundaries, error cases, and levels (unit/integration/e2e). Use when asked to write tests or create a test plan in any repo."

Test Design

Name: test-design
Rating: 87
Author: nthpaul

Overview

Translate requirements into a compact test plan and concrete cases that minimize regression risk.

Workflow

1) Clarify behavior

•Confirm acceptance criteria and non-goals.
•Identify inputs, outputs, and side effects.

2) Identify test levels

•Choose unit, integration, or e2e coverage based on risk and scope.
•Prefer the smallest effective level.

3) Enumerate cases

•Happy path
•Boundary conditions
•Invalid inputs and error handling
•State transitions and idempotency
•Performance or rate limits if relevant

4) Map to tests

•Group cases into test files/suites.
•Suggest fixtures and data builders.

Output template (adapt as needed)

•Acceptance criteria recap
•Test plan (levels + rationale)
•Test cases list
•Fixtures/data needs