Lucene.Net.Util.LuceneTestCase.NewIOContext C# (CSharp) Method

        public static IOContext NewIOContext(Random random, IOContext oldContext)
        {
            int randomNumDocs = random.Next(4192);
            int size = random.Next(512) * randomNumDocs;
            if (oldContext.FlushInfo != null)
            {
                // Always return at least the estimatedSegmentSize of
                // the incoming IOContext:
                return new IOContext(new FlushInfo(randomNumDocs, (long)Math.Max(oldContext.FlushInfo.EstimatedSegmentSize, size)));
            }
            else if (oldContext.MergeInfo != null)
            {
                // Always return at least the estimatedMergeBytes of
                // the incoming IOContext:
                return new IOContext(new MergeInfo(randomNumDocs, Math.Max(oldContext.MergeInfo.EstimatedMergeBytes, size), random.NextBoolean(), TestUtil.NextInt(random, 1, 100)));
            }
            else
            {
                // Make a totally random IOContext:
                IOContext context;
                switch (random.Next(5))
                {
                    case 0:
                        context = IOContext.DEFAULT;
                        break;

                    case 1:
                        context = IOContext.READ;
                        break;

                    case 2:
                        context = IOContext.READONCE;
                        break;

                    case 3:
                        context = new IOContext(new MergeInfo(randomNumDocs, size, true, -1));
                        break;

                    case 4:
                        context = new IOContext(new FlushInfo(randomNumDocs, size));
                        break;

                    default:
                        context = IOContext.DEFAULT;
                        break;
                }
                return context;
            }
        }