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

        public virtual void TestManyReopensAndFields()
        {
            Directory dir = NewDirectory();
            Random random = Random();
            IndexWriterConfig conf = NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random));
            LogMergePolicy lmp = NewLogMergePolicy();
            lmp.MergeFactor = 3; // merge often
            conf.SetMergePolicy(lmp);
            IndexWriter writer = new IndexWriter(dir, conf);

            bool isNRT = random.NextBoolean();
            DirectoryReader reader;
            if (isNRT)
            {
                reader = DirectoryReader.Open(writer, true);
            }
            else
            {
                writer.Commit();
                reader = DirectoryReader.Open(dir);
            }

            int numFields = random.Next(4) + 3; // 3-7
            long[] fieldValues = new long[numFields];
            bool[] fieldHasValue = new bool[numFields];
            Arrays.Fill(fieldHasValue, true);
            for (int i = 0; i < fieldValues.Length; i++)
            {
                fieldValues[i] = 1;
            }

            int numRounds = AtLeast(15);
            int docID = 0;
            for (int i = 0; i < numRounds; i++)
            {
                int numDocs = AtLeast(5);
                //      System.out.println("[" + Thread.currentThread().getName() + "]: round=" + i + ", numDocs=" + numDocs);
                for (int j = 0; j < numDocs; j++)
                {
                    Document doc = new Document();
                    doc.Add(new StringField("id", "doc-" + docID, Store.NO));
                    doc.Add(new StringField("key", "all", Store.NO)); // update key
                    // add all fields with their current value
                    for (int f = 0; f < fieldValues.Length; f++)
                    {
                        doc.Add(new BinaryDocValuesField("f" + f, ToBytes(fieldValues[f])));
                    }
                    writer.AddDocument(doc);
                    ++docID;
                }

                // if field's value was unset before, unset it from all new added documents too
                for (int field = 0; field < fieldHasValue.Length; field++)
                {
                    if (!fieldHasValue[field])
                    {
                        writer.UpdateBinaryDocValue(new Term("key", "all"), "f" + field, null);
                    }
                }

                int fieldIdx = random.Next(fieldValues.Length);
                string updateField = "f" + fieldIdx;
                if (random.NextBoolean())
                {
                    //        System.out.println("[" + Thread.currentThread().getName() + "]: unset field '" + updateField + "'");
                    fieldHasValue[fieldIdx] = false;
                    writer.UpdateBinaryDocValue(new Term("key", "all"), updateField, null);
                }
                else
                {
                    fieldHasValue[fieldIdx] = true;
                    writer.UpdateBinaryDocValue(new Term("key", "all"), updateField, ToBytes(++fieldValues[fieldIdx]));
                    //        System.out.println("[" + Thread.currentThread().getName() + "]: updated field '" + updateField + "' to value " + fieldValues[fieldIdx]);
                }

                if (random.NextDouble() < 0.2)
                {
                    int deleteDoc = random.Next(docID); // might also delete an already deleted document, ok!
                    writer.DeleteDocuments(new Term("id", "doc-" + deleteDoc));
                    //        System.out.println("[" + Thread.currentThread().getName() + "]: deleted document: doc-" + deleteDoc);
                }

                // verify reader
                if (!isNRT)
                {
                    writer.Commit();
                }

                //      System.out.println("[" + Thread.currentThread().getName() + "]: reopen reader: " + reader);
                DirectoryReader newReader = DirectoryReader.OpenIfChanged(reader);
                Assert.IsNotNull(newReader);
                reader.Dispose();
                reader = newReader;
                //      System.out.println("[" + Thread.currentThread().getName() + "]: reopened reader: " + reader);
                Assert.IsTrue(reader.NumDocs > 0); // we delete at most one document per round
                BytesRef scratch = new BytesRef();
                foreach (AtomicReaderContext context in reader.Leaves)
                {
                    AtomicReader r = context.AtomicReader;
                    //        System.out.println(((SegmentReader) r).getSegmentName());
                    Bits liveDocs = r.LiveDocs;
                    for (int field = 0; field < fieldValues.Length; field++)
                    {
                        string f = "f" + field;
                        BinaryDocValues bdv = r.GetBinaryDocValues(f);
                        Bits docsWithField = r.GetDocsWithField(f);
                        Assert.IsNotNull(bdv);
                        int maxDoc = r.MaxDoc;
                        for (int doc = 0; doc < maxDoc; doc++)
                        {
                            if (liveDocs == null || liveDocs.Get(doc))
                            {
                                //              System.out.println("doc=" + (doc + context.DocBase) + " f='" + f + "' vslue=" + getValue(bdv, doc, scratch));
                                if (fieldHasValue[field])
                                {
                                    Assert.IsTrue(docsWithField.Get(doc));
                                    Assert.AreEqual(fieldValues[field], GetValue(bdv, doc, scratch), "invalid value for doc=" + doc + ", field=" + f + ", reader=" + r);
                                }
                                else
                                {
                                    Assert.IsFalse(docsWithField.Get(doc));
                                }
                            }
                        }
                    }
                }
                //      System.out.println();
            }

            IOUtils.Close(writer, reader, dir);
        }