Lucene.Net.Index.TestIndexReader.TestCommitUserData C# (CSharp) Method

		public virtual void  TestCommitUserData()
		{
			RAMDirectory d = new MockRAMDirectory();

            System.Collections.Generic.IDictionary<string, string> commitUserData = new System.Collections.Generic.Dictionary<string,string>();
			commitUserData["foo"] = "fighters";
			
			// set up writer
			IndexWriter writer = new IndexWriter(d, new StandardAnalyzer(Util.Version.LUCENE_CURRENT), true, IndexWriter.MaxFieldLength.LIMITED);
			writer.SetMaxBufferedDocs(2);
			for (int i = 0; i < 27; i++)
				AddDocumentWithFields(writer);
			writer.Close();
			
			IndexReader r = IndexReader.Open(d, false);
			r.DeleteDocument(5);
			r.Flush(commitUserData);
			r.Close();
			
			SegmentInfos sis = new SegmentInfos();
			sis.Read(d);
			IndexReader r2 = IndexReader.Open(d, false);
			IndexCommit c = r.IndexCommit;
			Assert.AreEqual(c.UserData, commitUserData);
			
			Assert.AreEqual(sis.GetCurrentSegmentFileName(), c.SegmentsFileName);
			
			Assert.IsTrue(c.Equals(r.IndexCommit));
			
			// Change the index
            writer = new IndexWriter(d, new StandardAnalyzer(Util.Version.LUCENE_CURRENT), false, IndexWriter.MaxFieldLength.LIMITED);
			writer.SetMaxBufferedDocs(2);
			for (int i = 0; i < 7; i++)
				AddDocumentWithFields(writer);
			writer.Close();
			
			IndexReader r3 = r2.Reopen();
			Assert.IsFalse(c.Equals(r3.IndexCommit));
			Assert.IsFalse(r2.IndexCommit.IsOptimized);
			r3.Close();

            writer = new IndexWriter(d, new StandardAnalyzer(Util.Version.LUCENE_CURRENT), false, IndexWriter.MaxFieldLength.LIMITED);
			writer.Optimize();
			writer.Close();
			
			r3 = r2.Reopen();
			Assert.IsTrue(r3.IndexCommit.IsOptimized);
			r2.Close();
			r3.Close();
			d.Close();
		}