title: expected #count to have changed by 1, but was not given a block
body: <p>I am testing my <code>model</code> method which returns me an <code>Account object</code>. I am checking whether my table has inserted a new <code>row</code> and my Model reflects its count.</p>
  
  <p>Below is my spec.</p>
  
  <pre><code> it "can create an account" do    
      create_account = Account.create(account: acc) 
      create_account.should change(Account, :count).by(1);
   end
  </code></pre>
  
  <p>Error i am getting</p>
  
  <pre><code>8) Account can create an account
       Failure/Error: create_account.should change(Account, :count).by(1);
         expected #count to have changed by 1, but was not given a block
  </code></pre>