@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
session.sendMessage(new TextMessage("go go"));
}
};
TestWebSocketServerSockJsSession session = new TestWebSocketServerSockJsSession(this.sockJsConfig, handler, null);
session.initializeDelegateSession(this.webSocketSession);
List<TextMessage> expected = Arrays.asList(new TextMessage("o"), new TextMessage("a[\"go go\"]"));
assertEquals(expected, this.webSocketSession.getSentMessages());
}