rails/rails — pull request #7756 by yahonda (2012-09-25 17:04:50+00:00)
Title: Skip tests for non-supported isolation levels with Oracle

Since Oracle enhanced adapter supports specifying isolation levels with https://github.com/rsim/oracle-enhanced/commit/de100e9af48ba852807de0bf0ae221d91a22e9c4

Oracle database itself does not support `:read_uncommitted` nor `:repeatable_read`. Tess for these isolation levels should be skipped.