title: Replacing multiple methods in sinon stub
body: <p>I have a Service - personService -  in my Angular application that has two methods getEverybody and getPersonById.
  I can replace a method in my service using sinon stub like this:</p>
  
  <pre><code>var everybody = [...];
  serviceMock= sinon.stub(personService, "getEverybody").returns(everybody);
  </code></pre>
  
  <p>How do I write if I want to replace both methods?
  This does not seem to work:</p>
  
  <pre><code>var everybody = [...];
  var aPerson = {...};
  serviceMock= sinon.stub(personService, "getEverybody").returns(everybody);
  serviceMock= sinon.stub(personService, "getPersonById").returns(aPerson);
  </code></pre>