How Do I Test A Html5/Javascript Single Page Application Against Use Cases?

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Javascript

HTML

testing

I'm developing a single page application with html/javascript as a front-end and node.js as a backend, and i'm looking for a library to test both the client and server sides against the use cases. I would like to write tests that simulate the user interaction and assert the expected states and behaviors, thus covering all the involved pieces without doing separate client and server side testings.
I tried jasmine.js but could not achieve what i wanted, and the other libraries seem to be not much different to me, what approach do you suggest?