As of SERVER-48312, which landed in v4.7, all storage engines support document-level locking. But on v4.2 and v4.4, this test should be tagged as requires_document_locking to avoid a WriteError.
As of SERVER-48312, which landed in v4.7, all storage engines support document-level locking. But on v4.2 and v4.4, this test should be tagged as requires_document_locking to avoid a WriteError.