title: casperjs does not get $scope variables from AngularJS
body: <p>I am using casperjs to simulate some tests. After the user logs in, the <code>login</code> should be changed to <code>Hi, {{username}}</code>. The casperjs only captures <code>Hi,</code> but does not get the username. So if let it give me the message, it tells me the actual value it gets is <code>Hi,</code> not <code>Hi, user_name</code>. Is there any mis-communication issue between casperjs and angularJS? How can I fix this problem?</p>