gock

Versatile HTTP mocking made easy in Go that works with any net/http based stdlib implementation. Heavily inspired by nock. There is also its Python port, pook. Simple, expressive, fluent API. Semantic API DSL for declarative HTTP mock declarations. Built-in helpers for easy JSON/XML mocking. Supports persistent and volatile TTL-limited mocks. Full regular expressions capable HTTP request mock matching. Designed for both testing and runtime scenarios. Match request by method, URL params, headers and bodies. Extensible and pluggable HTTP matching rules. Ability to switch between mock and real networking modes. Ability to filter/map HTTP requests for accurate mock matching. Supports map and filters to handle mocks easily. Wide compatible HTTP interceptor using http.RoundTripper interface. Works with any net/http compatible client, such as gentleman. Network timeout/cancelation delay simulation. Extensible and hackable API. Dependency free.