@Test
    public void testToString() {
        String toString = "WebsocketConfig{urls='%s, allowOrigin='%s}";
        String expected = String.format(toString, URLS, ALLOW_ORIGIN);
        assertEquals(expected, websocketConfig.toString());
    }
add test case for {@link WebsocketConfig}.
shenyu-sync-data-center/shenyu-sync-data-websocket/src/test/java/org/apache/shenyu/plugin/sync/data/websocket/config/WebsocketConfigTest.java