auth test

[fuqcool]

@dafeizizhu So this is how I want to test our api.

• Mock data before each test case, so thats tests doesn't fail when fixture changes; also, it is helpful to mock different scenarios
• Use deep equal to check for server response, which is easier to read

[dafeizizhu]

use https://github.com/ahchoo/realtime/pull/81, close it.