WireMock

Uma ferramenta para mocking serviços HTTP.

Características:

• HTTP response stubbing, matchable on URL, header and body content patterns
• Request verification
• Runs in unit tests, as a standalone process or as a WAR app
• Configurable via a fluent Java API, JSON files and JSON over HTTP
• Record/playback of stubs
• Fault injection
• Per-request conditional proxying
• Browser proxying for request inspection and replacement
• Stateful behaviour simulation
• Configurable response delas

Link da lib (Link)