title: Object.any_instance should_receive vs expect() to receive
body: <p>The following piece of code works as expected:</p>
  
  <pre><code>Object.any_instance.should_receive(:subscribe)
  </code></pre>
  
  <p>But when using the new rspec expectation it does not work:</p>
  
  <pre><code>expect(Object.any_instance).to receive(:subscribe)
  </code></pre>
  
  <p>The error is:</p>
  
  <pre><code>expected: 1 time with any arguments
  received: 0 times with any arguments
  </code></pre>
  
  <p>How can I make this work with expect() to receive?</p>