Lucene.Net.Index.TestDirectoryReader.TestNoTermsIndex C# (CSharp) Метод

        public virtual void TestNoTermsIndex()
        {
            Directory dir = NewDirectory();
            IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())).SetCodec(TestUtil.AlwaysPostingsFormat(new Lucene41PostingsFormat())));
            Document doc = new Document();
            doc.Add(NewTextField("field", "a b c d e f g h i j k l m n o p q r s t u v w x y z", Field.Store.NO));
            doc.Add(NewTextField("number", "0 1 2 3 4 5 6 7 8 9", Field.Store.NO));
            writer.AddDocument(doc);
            writer.AddDocument(doc);
            writer.Dispose();

            DirectoryReader r = DirectoryReader.Open(dir, -1);
            try
            {
                r.DocFreq(new Term("field", "f"));
                Assert.Fail("did not hit expected exception");
            }
            catch (InvalidOperationException ise)
            {
                // expected
            }

            Assert.AreEqual(-1, ((SegmentReader)r.Leaves[0].Reader).TermInfosIndexDivisor);
            writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())).SetCodec(TestUtil.AlwaysPostingsFormat(new Lucene41PostingsFormat())).SetMergePolicy(NewLogMergePolicy(10)));
            writer.AddDocument(doc);
            writer.Dispose();

            // LUCENE-1718: ensure re-open carries over no terms index:
            DirectoryReader r2 = DirectoryReader.OpenIfChanged(r);
            Assert.IsNotNull(r2);
            Assert.IsNull(DirectoryReader.OpenIfChanged(r2));
            r.Dispose();
            IList<AtomicReaderContext> leaves = r2.Leaves;
            Assert.AreEqual(2, leaves.Count);
            foreach (AtomicReaderContext ctx in leaves)
            {
                try
                {
                    ctx.Reader.DocFreq(new Term("field", "f"));
                    Assert.Fail("did not hit expected exception");
                }
                catch (InvalidOperationException ise)
                {
                    // expected
                }
            }
            r2.Dispose();
            dir.Dispose();
        }