func checkIdAndAttempt(c *gc.C, mig state.ModelMigration, expected int) {
c.Check(mig.Id(), gc.Equals, fmt.Sprintf("%s:%d", mig.ModelUUID(), expected))
attempt, err := mig.Attempt()
c.Assert(err, jc.ErrorIsNil)
c.Check(attempt, gc.Equals, expected)
}
