pytorch

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# Owner(s): ["module: onnx"]
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import subprocess
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import sys
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import tempfile
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import pytorch_test_common
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from torch.testing._internal import common_utils
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class TestLazyONNXPackages(pytorch_test_common.ExportTestCase):
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    def _test_package_is_lazily_imported(self, pkg, torch_pkg="torch.onnx"):
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        with tempfile.TemporaryDirectory() as wd:
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            r = subprocess.run(
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                [sys.executable, "-Ximporttime", "-c", "import torch.onnx"],
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                capture_output=True,
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                text=True,
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                cwd=wd,
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                check=True,
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            )
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        # The extra space makes sure we're checking the package, not any package containing its name.
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        self.assertTrue(
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            f" {pkg}" not in r.stderr,
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            f"`{pkg}` should not be imported, full importtime: {r.stderr}",
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        )
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    def test_onnxruntime_is_lazily_imported(self):
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        self._test_package_is_lazily_imported("onnxruntime")
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    def test_onnxscript_is_lazily_imported(self):
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        self._test_package_is_lazily_imported("onnxscript")
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if __name__ == "__main__":
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    common_utils.run_tests()
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