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Generate API Test Cases from a Contract
Converts API documentation into a coverage matrix and runnable tests for successful, invalid, and edge-case requests.
Ready to use
Prompt
Generate test cases for the supplied API contract.
API contract or documentation:
{{api_contract}}
Testing framework:
{{testing_framework}}
Language:
{{programming_language}}
Existing project conventions:
{{existing_conventions}}
Highest-risk functionality:
{{risk_area}}
Do not invent endpoints, fields, status codes, or authentication behavior that are absent from the contract.
First create a coverage matrix containing:
- Endpoint
- Scenario
- Expected status
- Expected response behavior
- Test priority
- Contract section used as evidence
Then generate runnable tests covering:
- Successful requests
- Required-field validation
- Boundary values
- Invalid types and formats
- Authentication and authorization
- Idempotency, when applicable
- Rate-limit behavior, when documented
- Unexpected or malformed responses
List any behavior that cannot be tested because the contract is ambiguous. Keep fixtures small and follow the supplied project conventions.Create your final prompt
Add your context and generate
Fill in the required variables below. Optional variables can be left blank and will remain as placeholders.
The API specification or endpoint documentation.
The framework that should be used for the tests.
The programming language for the generated code.
Project-specific testing and coding patterns.
The functionality that needs the strongest test coverage.
What to expect
Example output
A contract-referenced coverage matrix followed by runnable TypeScript tests for successful requests, validation, boundaries, authentication, idempotency, and documented failure behavior.
Example context
Example input
Contract: Attached Orders API OpenAPI file. Framework: Jest with Supertest. Language: TypeScript. Conventions: Existing factories, no external calls. Risk area: Payment retries.