32 lines
1.0 KiB
Python
32 lines
1.0 KiB
Python
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import pytest
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from pytorch_lightning.utilities.xla_device_utils import XLADeviceUtils as xdu
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from tests.base.develop_utils import pl_multi_process_test
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try:
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import torch_xla.core.xla_model as xm
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XLA_AVAILABLE = True
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except ImportError as e:
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XLA_AVAILABLE = False
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@pytest.mark.skipif(XLA_AVAILABLE, reason="test requires torch_xla to be absent")
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def test_tpu_device_absence():
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"""Check tpu_device_exists returns None when torch_xla is not available"""
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assert xdu.tpu_device_exists() is None
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@pytest.mark.skipif(not XLA_AVAILABLE, reason="test requires torch_xla to be installed")
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def test_tpu_device_presence():
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"""Check tpu_device_exists returns True when TPU is available"""
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assert xdu.tpu_device_exists() is True
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@pytest.mark.skipif(not XLA_AVAILABLE, reason="test requires torch_xla to be installed")
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@pl_multi_process_test
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def test_xla_device_is_a_tpu():
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"""Check that the XLA device is a TPU"""
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device = xm.xla_device()
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device_type = xm.xla_device_hw(device)
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return device_type == "TPU"
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