lightyear/shoulda-matchers — comment on commit 9d0c74e4bfc2a1abb509cc4bdc1756ffdb561b9d
File:  line 0
By sjmadsen:

I minimize the amount of data in my tables for test runs and do not use fixtures. When these tests run, there is only one record in the database: the one I saved explicitly to test the uniqueness requirement. The simpler fall-back for `next_value` is enough in this case.