def setUp(self):
     """Prepare model test fixture."""
     try:
         new_attrs = {}
         new_attrs.update(self.attrs)
         new_attrs.update(self.do_get_dependencies())
         self.obj = self.klass(**new_attrs)
         DBSession.add(self.obj)
         DBSession.flush()
         return self.obj
     except:
         DBSession.rollback()
         raise
 def tearDown(self):
     """Finish model test fixture."""
     DBSession.rollback()