public static void setConnectTimeout(int connectTimeout) {
        ParamUtil.connectTimeout = connectTimeout;
    }
@Test
    void testSetConnectTimeout() {
        int defaultVal = ParamUtil.getConnectTimeout();
        assertEquals(defaultConnectTimeout, defaultVal);
        
        int expect = 50;
        ParamUtil.setConnectTimeout(expect);
        assertEquals(expect, ParamUtil.getConnectTimeout());
    }