library for stubbing HTTP requests in Ruby

 WebMock allows stubbing HTTP requests and setting expectations on HTTP
 requests.
 .
 Features
 .
  * Stubbing HTTP requests at low http client lib level (no need to change
    tests when you change HTTP library).
  * Setting and verifying expectations on HTTP requests.
  * Matching requests based on method, URI, headers and body.
  * Smart matching of the same URIs in different representations (also encoded
     and non encoded forms).
  * Smart matching of the same headers in different representations.