Coverage for python/lsst/daf/butler/tests/deferredFormatter.py : 78%

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1# This file is part of daf_butler.
2#
3# Developed for the LSST Data Management System.
4# This product includes software developed by the LSST Project
5# (http://www.lsst.org).
6# See the COPYRIGHT file at the top-level directory of this distribution
7# for details of code ownership.
8#
9# This program is free software: you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation, either version 3 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program. If not, see <http://www.gnu.org/licenses/>.
22from __future__ import annotations
24__all__ = ("DeferredFormatter")
26from typing import (
27 Any,
28 Optional,
29)
31from ..core import Formatter
34class DeferredFormatter(Formatter):
35 """A test formatter that does not need to format anything and exists
36 solely to be guaranteed to be loaded once by one test.
38 We want to ensure that the formatter system loads this on demand.
39 """
41 def read(self, component: Optional[str] = None) -> Any:
42 raise NotImplementedError("Type does not support reading")
44 def write(self, inMemoryDataset: Any) -> str:
45 raise NotImplementedError("Type does not support writing")