public void TestConstantScoreNestedAndFilter()
        {

            IFilter termFilter = new TermFilter("gender", "true");

            var andFilter = new AndFilter(termFilter);
            
            var constanFilter = new ConstantScoreQuery(andFilter);
            
            var result2 = client.Search(index, "type", constanFilter, 0, 5);
            Assert.AreEqual(50, result2.GetTotalCount());
            Assert.AreEqual(5, result2.GetHits().Hits.Count);


            //test and filter and range filter

            termFilter = new RangeFilter("age", "22", "25", true, true);

            andFilter = new AndFilter(termFilter);

            constanFilter = new ConstantScoreQuery(andFilter);
            result2 = client.Search(index, "type", constanFilter, 0, 5);
            Assert.AreEqual(4, result2.GetTotalCount());
            Assert.AreEqual(4, result2.GetHits().Hits.Count);


            //test bool filter and range filter
            termFilter = new RangeFilter("age", "22", "25", true, true);

            var boolfilter = new BoolFilter();
            boolfilter.Must(termFilter);

            constanFilter = new ConstantScoreQuery(boolfilter);
            result2 = client.Search(index, "type", constanFilter, 0, 5);
            Assert.AreEqual(4, result2.GetTotalCount());
            Assert.AreEqual(4, result2.GetHits().Hits.Count);


        }
        public void TestBoolFilterWithTwoCondition()
        {
            var boolFilter = new BoolFilter();
            boolFilter.Must(new TermFilter("type", "common"));
            boolFilter.Must(new TermFilter("age", "23"));

            var constantScoreQuery = new ConstantScoreQuery(boolFilter);
            var result = client.Search(index, "type" , constantScoreQuery, 0, 5);
            Assert.AreEqual(1, result.GetTotalCount());
            Assert.AreEqual(1, result.GetHits().Hits.Count);


            boolFilter = new BoolFilter();
            boolFilter.Must(new TermFilter("type", "common"));
            boolFilter.MustNot(new TermFilter("age", "23"));
            constantScoreQuery = new ConstantScoreQuery(boolFilter);
            result = client.Search(index, "type" , constantScoreQuery, 0, 5);
            Assert.AreEqual(2, result.GetTotalCount());
            Assert.AreEqual(2, result.GetHits().Hits.Count);
        }