add tests for priority query

[jamestalmage]

Closes #12

[urish]

Thanks! I am now going over all your additions, improving support for running under windows, etc.

Hope to release this soon as 0.4.0

[urish]

Hi @jamestalmage, thanks again for all the amazing work!

I noticed the following code lines:

            if (normalizedPath.isPriorityPath) {
                throw new Error('I don\'t know how to listen to a priority path');
            }

Have you found any scenario that triggers this code path?

[jamestalmage]

No. It certainly is possible using a raw websocket, but I don't think the firebase client ever would. It might be a good idea to have the message include reporting instructions.

If we had control / insight into the client source I might just remove it.

[urish]

@jamestalmage the full client source (unminified) is available here:

https://github.com/firebase/firebase-bower/blob/master/firebase-debug.js

If there is no easy way to reproduce this behavior via the client, I think it is better to remove the message...