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106 lines
3.1 KiB
106 lines
3.1 KiB
3 years ago
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import atexit
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import os
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import sys
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import textwrap
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import unittest
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from test import support
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from test.support import script_helper
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class GeneralTest(unittest.TestCase):
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def test_general(self):
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# Run _test_atexit.py in a subprocess since it calls atexit._clear()
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script = support.findfile("_test_atexit.py")
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script_helper.run_test_script(script)
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class FunctionalTest(unittest.TestCase):
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def test_shutdown(self):
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# Actually test the shutdown mechanism in a subprocess
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code = textwrap.dedent("""
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import atexit
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def f(msg):
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print(msg)
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atexit.register(f, "one")
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atexit.register(f, "two")
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""")
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res = script_helper.assert_python_ok("-c", code)
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self.assertEqual(res.out.decode().splitlines(), ["two", "one"])
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self.assertFalse(res.err)
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def test_atexit_instances(self):
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# bpo-42639: It is safe to have more than one atexit instance.
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code = textwrap.dedent("""
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import sys
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import atexit as atexit1
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del sys.modules['atexit']
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import atexit as atexit2
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del sys.modules['atexit']
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assert atexit2 is not atexit1
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atexit1.register(print, "atexit1")
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atexit2.register(print, "atexit2")
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""")
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res = script_helper.assert_python_ok("-c", code)
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self.assertEqual(res.out.decode().splitlines(), ["atexit2", "atexit1"])
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self.assertFalse(res.err)
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@support.cpython_only
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class SubinterpreterTest(unittest.TestCase):
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def test_callbacks_leak(self):
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# This test shows a leak in refleak mode if atexit doesn't
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# take care to free callbacks in its per-subinterpreter module
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# state.
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n = atexit._ncallbacks()
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code = textwrap.dedent(r"""
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import atexit
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def f():
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pass
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atexit.register(f)
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del atexit
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""")
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ret = support.run_in_subinterp(code)
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self.assertEqual(ret, 0)
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self.assertEqual(atexit._ncallbacks(), n)
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def test_callbacks_leak_refcycle(self):
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# Similar to the above, but with a refcycle through the atexit
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# module.
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n = atexit._ncallbacks()
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code = textwrap.dedent(r"""
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import atexit
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def f():
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pass
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atexit.register(f)
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atexit.__atexit = atexit
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""")
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ret = support.run_in_subinterp(code)
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self.assertEqual(ret, 0)
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self.assertEqual(atexit._ncallbacks(), n)
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def test_callback_on_subinterpreter_teardown(self):
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# This tests if a callback is called on
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# subinterpreter teardown.
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expected = b"The test has passed!"
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r, w = os.pipe()
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code = textwrap.dedent(r"""
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import os
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import atexit
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def callback():
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os.write({:d}, b"The test has passed!")
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atexit.register(callback)
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""".format(w))
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ret = support.run_in_subinterp(code)
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os.close(w)
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self.assertEqual(os.read(r, len(expected)), expected)
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os.close(r)
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if __name__ == "__main__":
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unittest.main()
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