Lucene.Net.Index.TestSnapshotDeletionPolicy.RunTest C# (CSharp) Method

        private void RunTest(Random random, Directory dir)
        {
            // Run for ~1 seconds
            long stopTime = Environment.TickCount + 1000;

            SnapshotDeletionPolicy dp = DeletionPolicy;
            IndexWriter writer = new IndexWriter(dir, (IndexWriterConfig)NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random)).SetIndexDeletionPolicy(dp).SetMaxBufferedDocs(2));

            // Verify we catch misuse:
            try
            {
                dp.Snapshot();
                Assert.Fail("did not hit exception");
            }
            catch (InvalidOperationException ise)
            {
                // expected
            }
            dp = (SnapshotDeletionPolicy)writer.Config.DelPolicy;
            writer.Commit();

            ThreadClass t = new ThreadAnonymousInnerClassHelper(stopTime, writer, NewField);

            t.Start();

            // While the above indexing thread is running, take many
            // backups:
            do
            {
                BackupIndex(dir, dp);
                Thread.Sleep(20);
            } while (t.IsAlive);

            t.Join();

            // Add one more document to force writer to commit a
            // final segment, so deletion policy has a chance to
            // delete again:
            Document doc = new Document();
            FieldType customType = new FieldType(TextField.TYPE_STORED);
            customType.StoreTermVectors = true;
            customType.StoreTermVectorPositions = true;
            customType.StoreTermVectorOffsets = true;
            doc.Add(NewField("content", "aaa", customType));
            writer.AddDocument(doc);

            // Make sure we don't have any leftover files in the
            // directory:
            writer.Dispose();
            TestIndexWriter.AssertNoUnreferencedFiles(dir, "some files were not deleted but should have been");
        }