public void AssertReaderStatisticsEquals(string info, IndexReader leftReader, IndexReader rightReader)
{
// Somewhat redundant: we never delete docs
Assert.AreEqual(leftReader.MaxDoc, rightReader.MaxDoc, info);
Assert.AreEqual(leftReader.NumDocs, rightReader.NumDocs, info);
Assert.AreEqual(leftReader.NumDeletedDocs, rightReader.NumDeletedDocs, info);
Assert.AreEqual(leftReader.HasDeletions, rightReader.HasDeletions, info);
}