def test_write_message_incorrect_request(mock_write):
    ac = ActiveConnections()
    app = tornado.web.Application()
    app.active_connections = ac
    r = MockRequest()

    r.path = '/myuser.js'
    r.uri = 'http://example.com/myuser.js'
    mh = MainHandler(app, r)

    mh.write_message()

    assert mock_write.call_count == 0, 'Wrote incorrect message'
def test_write_message(mock_write):
    ac = ActiveConnections()
    app = tornado.web.Application()
    app.active_connections = ac
    r = MockRequest()

    r.path = '/myuser/somepath.js'
    r.uri = 'http://example.com/myuser/somepath.js'
    mh = MainHandler(app, r)

    mh.write_message()

    mock_write.assert_called_once_with({
        'type': 'message',
        'user': '******',
        'file': 'somepath.js',
        'uri': 'http://example.com/myuser/somepath.js'
    })