Tests.QueryDSLTests.TestHasChildFilter C# (CSharp) Method

        public void TestHasChildFilter()
        {
            var index = "index_test_parent_child_type123_with_has_child_query";
//            client.DeleteIndex(index);
            #region preparing mapping

            var parentType = new TypeSetting("blog");
            parentType.AddStringField("title");
        	client.CreateIndex(index);
            var op = client.PutMapping(index, parentType);

            Assert.AreEqual(true, op.Acknowledged);

            var childType = new TypeSetting("comment", parentType);
            childType.AddStringField("comments");
            childType.AddStringField("author").Analyzer = "keyword";

            op = client.PutMapping(index, childType);
            Assert.AreEqual(true, op.Acknowledged);

            var mapping = client.GetMapping(index, "comment");

            Assert.True(mapping.IndexOf("_parent") > 0);

            client.Refresh();

            #endregion


            #region preparing test data

            Dictionary<string, object> dict=new Dictionary<string, object>();
            dict["title"] = "this is the blog title";
            client.Index(index, "blog", "1", dict);

            dict = new Dictionary<string, object>();
            dict["title"] = "hello.elasticsearch";
            client.Index(index, "blog", "2", dict);

            //child docs
            dict = new Dictionary<string, object>();
            dict["title"] = "awful,that's bullshit";
            dict["author"] = "lol";
            client.Index(index, "comment", "c1", dict,"1");

            dict = new Dictionary<string, object>();
            dict["title"] = "hey,lol,i can't agree more!";
            dict["author"] = "laday-guagua";
            client.Index(index, "comment", "c2", dict, "1");

            dict = new Dictionary<string, object>();
            dict["title"] = "it rocks";
            dict["author"] = "laday-guagua";
            client.Index(index, "comment", "c3", dict, "2");
            #endregion

            client.Refresh();
            Thread.Sleep(2000);

            var q=new ConstantScoreQuery(new HasChildFilter("comment",new TermQuery("author","lol")));
            var result=client.Search(index, "blog", q,0,5);

            Assert.AreEqual(1,result.GetTotalCount());
            Assert.AreEqual("1",result.GetHitIds()[0]);


            q = new ConstantScoreQuery(new HasChildFilter("comment", new TermQuery("author", "laday-guagua")));
            result = client.Search(index, "blog" , q, 0, 5);

            Assert.AreEqual(2, result.GetTotalCount());
             
            client.DeleteIndex(index);
        }