VCR
A Ruby library that records HTTP interactions and replays them for fast, deterministic tests.
What is VCR?
VCR is a Ruby gem that records HTTP requests and responses during test runs and saves them as 'cassettes' for future replay. It solves the problem of slow, flaky tests that depend on external web services by eliminating real network calls, making tests fast, deterministic, and accurate. Developers use it to isolate their test suites from network conditions and third-party service availability.
Ruby developers writing tests for applications that make HTTP requests to external APIs or web services, especially those using RSpec, Cucumber, Test::Unit, or Minitest.
VCR is the de facto standard for HTTP recording in Ruby because of its extensive library support, simple configuration, and robust cassette management. It offers a unique balance of ease-of-use and flexibility, allowing precise control over request matching and response replay without sacrificing test realism.
Overview
Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.
Use Cases
Best For
- Testing applications that consume third-party REST APIs
Related Projects
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