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"""
Tests run by test_atexit in a subprocess since it clears atexit callbacks.
"""
import atexit
import sys
import unittest
from test import support
class GeneralTest(unittest.TestCase):
def setUp(self):
atexit._clear()
def tearDown(self):
atexit._clear()
def assert_raises_unraisable(self, exc_type, func, *args):
with support.catch_unraisable_exception() as cm:
atexit.register(func, *args)
atexit._run_exitfuncs()
self.assertIsNone(cm.unraisable.object)
self.assertEqual(cm.unraisable.err_msg,
f'Exception ignored in atexit callback {func!r}')
self.assertEqual(cm.unraisable.exc_type, exc_type)
self.assertEqual(type(cm.unraisable.exc_value), exc_type)
def test_order(self):
# Check that callbacks are called in reverse order with the expected
# positional and keyword arguments.
calls = []
def func1(*args, **kwargs):
calls.append(('func1', args, kwargs))
def func2(*args, **kwargs):
calls.append(('func2', args, kwargs))
# be sure args are handled properly
atexit.register(func1, 1, 2)
atexit.register(func2)
atexit.register(func2, 3, key="value")
atexit._run_exitfuncs()
self.assertEqual(calls,
[('func2', (3,), {'key': 'value'}),
('func2', (), {}),
('func1', (1, 2), {})])
def test_badargs(self):
def func():
pass
# func() has no parameter, but it's called with 2 parameters
self.assert_raises_unraisable(TypeError, func, 1 ,2)
def test_raise(self):
def raise_type_error():
raise TypeError
self.assert_raises_unraisable(TypeError, raise_type_error)
def test_raise_unnormalized(self):
# bpo-10756: Make sure that an unnormalized exception is handled
# properly.
def div_zero():
1 / 0
self.assert_raises_unraisable(ZeroDivisionError, div_zero)
def test_exit(self):
self.assert_raises_unraisable(SystemExit, sys.exit)
def test_stress(self):
a = [0]
def inc():
a[0] += 1
for i in range(128):
atexit.register(inc)
atexit._run_exitfuncs()
self.assertEqual(a[0], 128)
def test_clear(self):
a = [0]
def inc():
a[0] += 1
atexit.register(inc)
atexit._clear()
atexit._run_exitfuncs()
self.assertEqual(a[0], 0)
def test_unregister(self):
a = [0]
def inc():
a[0] += 1
def dec():
a[0] -= 1
for i in range(4):
atexit.register(inc)
atexit.register(dec)
atexit.unregister(inc)
atexit._run_exitfuncs()
self.assertEqual(a[0], -1)
def test_bound_methods(self):
l = []
atexit.register(l.append, 5)
atexit._run_exitfuncs()
self.assertEqual(l, [5])
atexit.unregister(l.append)
atexit._run_exitfuncs()
self.assertEqual(l, [5])
def test_atexit_with_unregistered_function(self):
# See bpo-46025 for more info
def func():
atexit.unregister(func)
1/0
atexit.register(func)
try:
with support.catch_unraisable_exception() as cm:
atexit._run_exitfuncs()
self.assertIsNone(cm.unraisable.object)
self.assertEqual(cm.unraisable.err_msg,
f'Exception ignored in atexit callback {func!r}')
self.assertEqual(cm.unraisable.exc_type, ZeroDivisionError)
self.assertEqual(type(cm.unraisable.exc_value), ZeroDivisionError)
finally:
atexit.unregister(func)
if __name__ == "__main__":
unittest.main()
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