title: How to check the value is in object with Chai?
body: <p>Is it possible to test the value is contained within certain array with Chai assertion library?</p>
  
  <p>Example:</p>
  
  <pre><code>var myObject = {
      a : 1,
      b : 2,
      c : 3
  };
  var myValue = 2;
  </code></pre>
  
  <p>I need to do something like this (however it is not working):</p>
  
  <pre><code>expect(myObject).values.to.contain(myValue);
  //Error: Cannot read property 'to' of undefined
  
  expect(myObject).to.contain(myValue);
  //Error: Object #&lt;Object&gt; has no method 'indexOf'
  </code></pre>
  
  <p>How can I test this?</p>