Lucene.Net.Index.TestTermVectorsWriter.TestDoubleOffsetCounting C# (CSharp) Метод

        public virtual void TestDoubleOffsetCounting()
        {
            Directory dir = NewDirectory();
            IndexWriter w = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())));
            Document doc = new Document();
            FieldType customType = new FieldType(StringField.TYPE_NOT_STORED);
            customType.StoreTermVectors = true;
            customType.StoreTermVectorPositions = true;
            customType.StoreTermVectorOffsets = true;
            Field f = NewField("field", "abcd", customType);
            doc.Add(f);
            doc.Add(f);
            Field f2 = NewField("field", "", customType);
            doc.Add(f2);
            doc.Add(f);
            w.AddDocument(doc);
            w.Dispose();

            IndexReader r = DirectoryReader.Open(dir);
            Terms vector = r.GetTermVectors(0).Terms("field");
            Assert.IsNotNull(vector);
            TermsEnum termsEnum = vector.Iterator(null);
            Assert.IsNotNull(termsEnum.Next());
            Assert.AreEqual("", termsEnum.Term().Utf8ToString());

            // Token "" occurred once
            Assert.AreEqual(1, termsEnum.TotalTermFreq());

            DocsAndPositionsEnum dpEnum = termsEnum.DocsAndPositions(null, null);
            Assert.IsTrue(dpEnum.NextDoc() != DocIdSetIterator.NO_MORE_DOCS);
            dpEnum.NextPosition();
            Assert.AreEqual(8, dpEnum.StartOffset());
            Assert.AreEqual(8, dpEnum.EndOffset());
            Assert.AreEqual(DocIdSetIterator.NO_MORE_DOCS, dpEnum.NextDoc());

            // Token "abcd" occurred three times
            Assert.AreEqual(new BytesRef("abcd"), termsEnum.Next());
            dpEnum = termsEnum.DocsAndPositions(null, dpEnum);
            Assert.AreEqual(3, termsEnum.TotalTermFreq());

            Assert.IsTrue(dpEnum.NextDoc() != DocIdSetIterator.NO_MORE_DOCS);
            dpEnum.NextPosition();
            Assert.AreEqual(0, dpEnum.StartOffset());
            Assert.AreEqual(4, dpEnum.EndOffset());

            dpEnum.NextPosition();
            Assert.AreEqual(4, dpEnum.StartOffset());
            Assert.AreEqual(8, dpEnum.EndOffset());

            dpEnum.NextPosition();
            Assert.AreEqual(8, dpEnum.StartOffset());
            Assert.AreEqual(12, dpEnum.EndOffset());

            Assert.AreEqual(DocIdSetIterator.NO_MORE_DOCS, dpEnum.NextDoc());
            Assert.IsNull(termsEnum.Next());
            r.Dispose();
            dir.Dispose();
        }