# Copyright The PyTorch Lightning team. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import os from unittest.mock import Mock from pytorch_lightning.plugins import TPUBf16PrecisionPlugin def test_teardown(): plugin = TPUBf16PrecisionPlugin() plugin.connect(Mock(), Mock(), Mock()) assert os.environ.get("XLA_USE_BF16") == "1" plugin.teardown() assert "XLA_USE_BF16" not in os.environ