'Test __init__ when one field is missing.'

def test_init_default(self):

    for field in self.fields:
        fields = self.fields.copy()
        del fields[field]
        req = objects.CleanupRequest(mock.sentinel.context, **fields)
        fields[field] = self._req_default(field)
        self.assertDictEqual(fields, self._req_as_dict(req))
