def date_trunc_sql(self, lookup_type, field_name):
        raise NotImplementedError()
Return a suite of all tests cases given a string specifier.
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Django-1.6.10/django/db/backends/__init__.py/BaseDatabaseOperations.date_trunc_sql--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/cherrypy/cherrypy/test/webtest.py/ReloadingTestLoader.loadTestsFromName