W
wiremock/wiremock
Wiremock
WireMock is a suite of tools for service virtualization, providing mock servers for HTTP APIs and WebSocket communication. It serves as an HTTP API mock server and request verifier, allowing for the simulation of responses and the interception of network requests to test client applications without a live backend.
The project differentiates itself through a service virtualization model that records real network traffic and replays it as stubs to mimic external service behavior. It includes a network fault injector to simulate response delays and connectivity issues, and a stateful scenario machine to mimic complex multi-step business workflows.
The toolset covers response stubbing and request verification through an in-memory request journal. It supports dynamic response templating and allows for the injection of custom Java logic via programmable server extensions to handle specialized request matching or response generation.
Features
- API Response Simulators - Intercepts outgoing network requests and returns predefined data to simulate server scenarios without a live backend.
- HTTP Mock Servers - Acts as a mock server for HTTP APIs to simulate responses and intercept requests without a live backend.
- Service Virtualization - Records real network traffic and replays it as stubs to virtualize external service behavior.
- Network Faults - Simulates connectivity issues, latency, and DNS disruptions to test application resilience.
- HTTP Response Stubbing - Returns predefined responses based on patterns found in the request URL, headers, or body.
- Request Matching Engines - Matches incoming HTTP requests against a library of predefined patterns to determine the appropriate stubbed response.
- Request Verification - Inspects outgoing HTTP requests to verify that clients send the expected data to the server.
- HTTP Traffic Recording - Captures live HTTP interactions and saves them as stubs to be replayed in subsequent tests.
- HTTP Interaction Verifiers - Inspects outgoing network traffic via an in-memory request journal to verify that clients send expected data.
- In-Memory Debug Logs - Stores a chronological volatile log of all received requests for verification of outgoing client data.
- Controlled Fault Injections - Deliberately introduces network delays or malformed data into the response pipeline to validate resilience.
- API Request Proxying - Provides mechanisms for forwarding API calls to remote services to intercept or modify responses.
- Stateful API Simulations - Maintains internal state across multiple requests to mimic complex business logic and sequential API workflows.
- Server Extensions - Provides programmable extensions to add custom logic to the request matching and response generation process.
- Traffic Interception - Forwards requests to a real backend while capturing responses for recording or on-the-fly modification.
- Plugin-Based Logic Extensions - Allows custom Java code to be loaded at runtime to implement specialized request matching or response generation.
- Automation State Machines - Tracks sequences of request-response transitions to simulate state machines that mimic complex business workflows.
- Integration Test Suites - Facilitates integration testing by capturing and inspecting outgoing network requests to verify client data.
- WebSocket Mocking Tools - Mocks bidirectional message exchanges over WebSocket connections to test real-time communication logic.
- Network Resilience Simulators - Simulates network delays and connectivity faults to ensure applications handle timeouts and errors gracefully.
- Stateful Testing - Provides a stateful scenario machine to mimic complex multi-step business workflows and sequential API interactions.
- Response Body Templating - Generates customized response bodies by injecting data extracted from the original request into templates.
- Testing Utilities - Simulates bidirectional real-time messaging and server-side events to test WebSocket communication logic.
- Mocking Tools - Flexible tool for reliable API simulation.
- Service Virtualization - HTTP mock engine for embedding in test code or standalone.
