public virtual void TestSegmentMerges()
{
Directory dir = NewDirectory();
Random random = Random();
IndexWriterConfig conf = NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random));
IndexWriter writer = new IndexWriter(dir, (IndexWriterConfig)conf.Clone());
int docid = 0;
int numRounds = AtLeast(10);
for (int rnd = 0; rnd < numRounds; rnd++)
{
Document doc = new Document();
doc.Add(new StringField("key", "doc", Store.NO));
doc.Add(new BinaryDocValuesField("bdv", ToBytes(-1)));
int numDocs = AtLeast(30);
for (int i = 0; i < numDocs; i++)
{
doc.RemoveField("id");
doc.Add(new StringField("id", Convert.ToString(docid++), Store.NO));
writer.AddDocument(doc);
}
long value = rnd + 1;
writer.UpdateBinaryDocValue(new Term("key", "doc"), "bdv", ToBytes(value));
if (random.NextDouble() < 0.2) // randomly delete some docs
{
writer.DeleteDocuments(new Term("id", Convert.ToString(random.Next(docid))));
}
// randomly commit or reopen-IW (or nothing), before forceMerge
if (random.NextDouble() < 0.4)
{
writer.Commit();
}
else if (random.NextDouble() < 0.1)
{
writer.Dispose();
writer = new IndexWriter(dir, (IndexWriterConfig)conf.Clone());
}
// add another document with the current value, to be sure forceMerge has
// something to merge (for instance, it could be that CMS finished merging
// all segments down to 1 before the delete was applied, so when
// forceMerge is called, the index will be with one segment and deletes
// and some MPs might now merge it, thereby invalidating test's
// assumption that the reader has no deletes).
doc = new Document();
doc.Add(new StringField("id", Convert.ToString(docid++), Store.NO));
doc.Add(new StringField("key", "doc", Store.NO));
doc.Add(new BinaryDocValuesField("bdv", ToBytes(value)));
writer.AddDocument(doc);
writer.ForceMerge(1, true);
DirectoryReader reader;
if (random.NextBoolean())
{
writer.Commit();
reader = DirectoryReader.Open(dir);
}
else
{
reader = DirectoryReader.Open(writer, true);
}
Assert.AreEqual(1, reader.Leaves.Count);
AtomicReader r = (AtomicReader)reader.Leaves[0].Reader;
Assert.IsNull(r.LiveDocs, "index should have no deletes after forceMerge");
BinaryDocValues bdv = r.GetBinaryDocValues("bdv");
Assert.IsNotNull(bdv);
BytesRef scratch = new BytesRef();
for (int i = 0; i < r.MaxDoc; i++)
{
Assert.AreEqual(value, GetValue(bdv, i, scratch));
}
reader.Dispose();
}
writer.Dispose();
dir.Dispose();
}