def METHOD_NAME(self):
    # create a resource
    self.res = create_resource(resource_type='CompositeResource',
                               owner=self.user,
                               title='Test Resource',
                               metadata=[], )
    self.res.setAVU('bag_modified', 'false')
    self.assertFalse(self.res.getAVU('bag_modified'))
    # add files - this is the api we are testing
    add_resource_files(self.res.short_id, self.myfile1, self.myfile2, self.myfile3)
    self.assertTrue(self.res.getAVU('bag_modified'))