public void testDefault()
        {
            EvnContext evnContext = new EvnContext("testkey", "test_asss");

            Assert.AreEqual(evnContext.getAccessKey(), "testkey");
            Assert.AreEqual(evnContext.getAccessSecret(), "test_asss");
            Assert.AreEqual(evnContext.getRequestUrl(), "https://qingstor.com");
            Assert.AreEqual(evnContext.getLog_level(), QSConstant.LOGGER_ERROR);
        }