title: How to test output HTTP request content in Spring application?
body: <p>I have the Spring application.</p>
  
  <p>We have the service which makes HTTP requests to external services. Now I think about writing Unit Test on this functionality. I want to write the integration tests. Thus I want to know that service request is correct.</p>
  
  <p>Is there ways to do it in spring? (actually I don't know ways to do it outside the Spring too)</p>