public void CheckAsync_OK_Test()
        {
            var checker = new RedisHealthChecker("Redis", "localhost:6379,defaultDatabase=1");
            var r       = checker.CheckAsync().Result;

            Assert.IsNull(r);
        }
        public void CheckAsync_Dead_Test()
        {
            var checker = new RedisHealthChecker("Redis", "localhost:6380,defaultDatabase=1");

            Assert.ThrowsException <AggregateException>(() => checker.CheckAsync().Result);
        }