RESTSpy

Mock REST endpoints or proxy them to real endpoints.

A Spy is a local proxy server that by default redirects all requests to another server. You can then start to mock certain endpoints.

In a test setup you will create a Spy for every REST service that your application depends on and that you want to spy on.

Once a Spy is created, you can start mocking certain endpoints, by providing Doubles. A Double represents a HTTP response as a triplet of a status code, headers and body.

To get easy access to the RestSpy API you can include RestSpy::Api

include RestSpy::Api

Mock http://localhost:1234/stream endpoint, while requests to all other endpoints are proxied to https://www.facebook.com

facebook = Spy.server_on_local_port('https://www.facebook.com', 1234)
facebook.endpoint('/stream').should(return_response('Hello world!'))

Endpoints can also be matched using a regular expression. The following example shows how to mock all endpoints on localhost:1234 that start with stream.

facebook.endpoint('/stream.*').should(return_response(`Hello world!`, headers={'Token' => 'abcd'}))

Simulate an error code on the http://localhost:1234/search endpoint, while requests to all other endpoints are proxied to http://www.google.com

google = Spy.server_on_local_port('http://www.google.com', 1234)
google.endpoint('/search').should(return_error_code 401)

You can also define series of doubles and proxies for an endpoint:

google.endpoint('/mail').should(
          first(return_error_code 500)
          .and_then(return_error_code 401)
          .and_then(proxy_to(facebook.remote_url)))