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$t->websocket_ok($url)
  ->send_ok({json => {hello => 'Dancer'}})
  ->message_ok
  ->json_message_is({hello => 'browser!'})
  ->finish_ok;

done_testing;
</code></pre>

<p>Unlike the previous examples, this time the connection stays open (but blocked) between method calls.
Per the protocol of the example, we first send a greeting to the Dancer app as a JSON document.
Since so much real-world websocket usage is just serialized JSON messages, Mojolicious provides many JSON-over-WebSocket conveniences.
One such convenience is a virtual websocket frame type that takes a data structure and serializes it as JSON before actually sending it as a text frame.</p>

<p>We then wait to get a message in response with <code>message_ok</code>.
In this case, we expect the application to greet us by calling us &quot;browser!&quot;.
Oh well, it doesn&#39;t know any better!
We can the test that JSON reply with <code>json_message_is</code> (like <code>json_is</code> above but for websocket messages).
Finally we close the connection, testing that it closes correctly.</p>