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30 lines
912 B
30 lines
912 B
import unittest
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from threading import Thread
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from unittest import TestCase
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from test.support import threading_helper
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@threading_helper.requires_working_threading()
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class TestCode(TestCase):
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def test_code_attrs(self):
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"""Test concurrent accesses to lazily initialized code attributes"""
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code_objects = []
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for _ in range(1000):
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code_objects.append(compile("a + b", "<string>", "eval"))
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def run_in_thread():
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for code in code_objects:
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self.assertIsInstance(code.co_code, bytes)
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self.assertIsInstance(code.co_freevars, tuple)
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self.assertIsInstance(code.co_varnames, tuple)
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threads = [Thread(target=run_in_thread) for _ in range(2)]
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for thread in threads:
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thread.start()
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for thread in threads:
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thread.join()
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if __name__ == "__main__":
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unittest.main()
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