22 lines
796 B
Python
22 lines
796 B
Python
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from unittest.mock import Mock
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import pytest
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import torch
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from pytorch_lightning.accelerators import CPUAccelerator
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from pytorch_lightning.plugins import SingleDevicePlugin
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from pytorch_lightning.plugins.precision import MixedPrecisionPlugin
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from pytorch_lightning.utilities.exceptions import MisconfigurationException
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def test_unsupported_precision_plugins():
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""" Test error messages are raised for unsupported precision plugins with CPU. """
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trainer = Mock()
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model = Mock()
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accelerator = CPUAccelerator(
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training_type_plugin=SingleDevicePlugin(torch.device("cpu")),
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precision_plugin=MixedPrecisionPlugin()
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)
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with pytest.raises(MisconfigurationException, match=r"amp \+ cpu is not supported."):
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accelerator.setup(trainer=trainer, model=model)
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