Lucene.Net.Search.TestSort.TestStringMissingSortedFirst C# (CSharp) Метод

        public virtual void TestStringMissingSortedFirst()
        {
            Directory dir = NewDirectory();
            RandomIndexWriter writer = new RandomIndexWriter(Random(), dir, Similarity, TimeZone);
            Document doc = new Document();
            writer.AddDocument(doc);
            doc = new Document();
            doc.Add(NewStringField("value", "foo", Field.Store.YES));
            writer.AddDocument(doc);
            doc = new Document();
            doc.Add(NewStringField("value", "bar", Field.Store.YES));
            writer.AddDocument(doc);
            IndexReader ir = writer.Reader;
            writer.Dispose();

            IndexSearcher searcher = NewSearcher(ir);
            SortField sf = new SortField("value", SortField.Type_e.STRING);
            Sort sort = new Sort(sf);

            TopDocs td = searcher.Search(new MatchAllDocsQuery(), 10, sort);
            Assert.AreEqual(3, td.TotalHits);
            // null comes first
            Assert.IsNull(searcher.Doc(td.ScoreDocs[0].Doc).Get("value"));
            Assert.AreEqual("bar", searcher.Doc(td.ScoreDocs[1].Doc).Get("value"));
            Assert.AreEqual("foo", searcher.Doc(td.ScoreDocs[2].Doc).Get("value"));

            ir.Dispose();
            dir.Dispose();
        }