Lucene.Net.Index.TestBinaryDocValuesUpdates.TestAddIndexes C# (CSharp) Method

        public virtual void TestAddIndexes()
        {
            Directory dir1 = NewDirectory();
            IndexWriterConfig conf = NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random()));
            IndexWriter writer = new IndexWriter(dir1, conf);

            int numDocs = AtLeast(50);
            int numTerms = TestUtil.NextInt(Random(), 1, numDocs / 5);
            HashSet<string> randomTerms = new HashSet<string>();
            while (randomTerms.Count < numTerms)
            {
                randomTerms.Add(TestUtil.RandomSimpleString(Random()));
            }

            // create first index
            for (int i = 0; i < numDocs; i++)
            {
                Document doc = new Document();
                doc.Add(new StringField("id", RandomInts.RandomFrom(Random(), randomTerms), Store.NO));
                doc.Add(new BinaryDocValuesField("bdv", ToBytes(4L)));
                doc.Add(new BinaryDocValuesField("control", ToBytes(8L)));
                writer.AddDocument(doc);
            }

            if (Random().NextBoolean())
            {
                writer.Commit();
            }

            // update some docs to a random value
            long value = Random().Next();
            Term term = new Term("id", RandomInts.RandomFrom(Random(), randomTerms));
            writer.UpdateBinaryDocValue(term, "bdv", ToBytes(value));
            writer.UpdateBinaryDocValue(term, "control", ToBytes(value * 2));
            writer.Dispose();

            Directory dir2 = NewDirectory();
            conf = NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random()));
            writer = new IndexWriter(dir2, conf);
            if (Random().NextBoolean())
            {
                writer.AddIndexes(dir1);
            }
            else
            {
                DirectoryReader reader = DirectoryReader.Open(dir1);
                writer.AddIndexes(reader);
                reader.Dispose();
            }
            writer.Dispose();

            DirectoryReader reader_ = DirectoryReader.Open(dir2);
            BytesRef scratch = new BytesRef();
            foreach (AtomicReaderContext context in reader_.Leaves)
            {
                AtomicReader r = context.AtomicReader;
                BinaryDocValues bdv = r.GetBinaryDocValues("bdv");
                BinaryDocValues control = r.GetBinaryDocValues("control");
                for (int i = 0; i < r.MaxDoc; i++)
                {
                    Assert.AreEqual(GetValue(bdv, i, scratch) * 2, GetValue(control, i, scratch));
                }
            }
            reader_.Dispose();

            IOUtils.Close(dir1, dir2);
        }