OkReplay

OkReplay is a tool for recording and replaying HTTP interactions (specifically via OkHttp) in Android tests to improve determinism, test speed, and reliability. During the first run of a test annotated with @OkReplay, the library records outgoing HTTP requests and their responses into tape files. On subsequent runs, it intercepts those requests and serves the recorded responses instead of making real network calls. This allows tests to be executed offline, reduces flakiness due to network variability, and isolates the test environment from external dependencies. OkReplay integrates with testing frameworks such as JUnit and Espresso, so it fits naturally into Android testing pipelines. Because recording only happens when running with the annotation, production code paths remain unaffected. It’s especially useful when your app’s logic depends on network APIs and you want faster, more reliable unit or integration tests.