28 lines
1.1 KiB
Python
28 lines
1.1 KiB
Python
# Copyright The PyTorch Lightning team.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import pytest
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from pytorch_lightning import Trainer
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from pytorch_lightning.utilities.exceptions import MisconfigurationException
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from tests.helpers.boring_model import BoringModel
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def test_tuner_with_distributed_strategies():
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"""Test that an error is raised when tuner is used with multi-device strategy."""
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trainer = Trainer(auto_scale_batch_size=True, devices=2, strategy="ddp", accelerator="cpu")
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model = BoringModel()
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with pytest.raises(MisconfigurationException, match=r"not supported with `Trainer\(strategy='ddp'\)`"):
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trainer.tune(model)
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