A software development approach where tests are written before the implementation code, ensuring code quality and driving design decisions through test requirements. Test-first development is the foundational principle behind test-driven development (TDD) and behavior-driven development (BDD), where the specification of expected behavior is captured in executable tests before any production code is written.
URL: Visit APIs.json URL
Run: Capabilities Using Naftiko
- Behavior-Driven Development, Best Practices, Methodology, Software Design, Software Development, Testing
- Created: 2025
- Modified: 2026-05-03
REST API and tooling for Cucumber BDD framework supporting test-first development with Gherkin feature files, scenario definitions, and step implementations.
Human URL: https://cucumber.io
- Behavior-Driven Development, Gherkin, Test Automation, Testing
REST API for Pact Broker contract testing service, enabling consumer-driven contract testing where consumer tests define the API contract before providers implement it.
Human URL: https://docs.pact.io
- Consumer-Driven Contracts, Contract Testing, Microservices, Test-First
API design-first platform enabling teams to write API specifications before implementation, supporting test-first development with mock servers, contract testing, and API style guides.
Human URL: https://stoplight.io
- API Design, Contract Testing, Mock Servers, Test-First
Open-source cloud-native tool for API mocking and contract testing, supporting test-first development by generating mocks from OpenAPI, Postman, and gRPC specifications.
Human URL: https://microcks.io
- API Mocking, Contract Testing, Open Source, Test-First
Command-line HTTP API testing framework that validates API implementations against API Blueprint or OpenAPI descriptions, enabling test-first API development.
Human URL: https://dredd.org
- API Testing, Contract Testing, OpenAPI, Test-First
| Name | Description |
|---|---|
| Specification Before Implementation | Write executable test specifications that define expected behavior before writing any production code. |
| API Contract Definition | Define the API contract through tests before the implementation exists, ensuring design clarity. |
| Mock-First Development | Use mock servers generated from specifications to enable parallel frontend and backend development. |
| Living Documentation | Tests serve as up-to-date documentation of how the system is expected to behave. |
| Fail Fast Feedback | Discover design issues early by specifying tests before implementation reveals constraints. |
| Consumer-Driven Contracts | Let API consumers define their expectations as tests that the API provider must satisfy. |
| Name | Description |
|---|---|
| API-First Design | Write OpenAPI specifications and generate tests from them before building the implementation. |
| Consumer-Driven Contract Testing | API consumers publish test expectations that API providers must verify in their CI pipelines. |
| Behavior-Driven Development | Use Gherkin feature files to define expected system behavior before writing implementation. |
| Parallel Development | Enable frontend and backend teams to develop in parallel using mock servers from specifications. |
| Specification Compliance | Validate that API implementations comply with their published specifications using test-first assertions. |
| Name | Description |
|---|---|
| OpenAPI | Generate test-first stubs and mocks directly from OpenAPI specifications. |
| Cucumber | Use Gherkin scenarios as the test-first specification for behavior-driven development. |
| Pact | Apply consumer-driven contract testing where consumer tests define provider expectations. |
| Prism | Use Stoplight Prism to mock APIs from OpenAPI specs enabling test-first development. |
Machine-readable API specifications organized by format.
- Test First Vocabulary — Unified taxonomy mapping 3 resources, 9 actions, and 3 personas across test-first development domains.
FN: Kin Lane
Email: kin@apievangelist.com