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bpo-36829: Add test.support.catch_unraisable_exception() (GH-13490)

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* Copy test_exceptions.test_unraisable() to
  test_sys.UnraisableHookTest().
* Use catch_unraisable_exception() in test_coroutines,
  test_exceptions, test_generators.
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Victor Stinner 2019-05-22 23:44:02 +02:00 • committed by GitHub
parent 904e34d4e6
commit e4d300e07c
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6 changed files with 108 additions and 43 deletions
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28
Lib/test/test_generators.py
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@ -2156,25 +2156,21 @@ explicitly, without generators. We do have to redirect stderr to avoid
printing warnings and to doublecheck that we actually tested what we wanted
to test.
>>> import sys, io
>>> old = sys.stderr
>>> try:
... sys.stderr = io.StringIO()
... class Leaker:
... def __del__(self):
... def invoke(message):
... raise RuntimeError(message)
... invoke("test")
>>> from test import support
>>> class Leaker:
... def __del__(self):
... def invoke(message):
... raise RuntimeError(message)
... invoke("del failed")
...
>>> with support.catch_unraisable_exception() as cm:
... l = Leaker()
... del l
... err = sys.stderr.getvalue().strip()
... "Exception ignored in" in err
... "RuntimeError: test" in err
... "Traceback" in err
... "in invoke" in err
... finally:
... sys.stderr = old
...
... cm.unraisable.object == Leaker.__del__
... cm.unraisable.exc_type == RuntimeError
... str(cm.unraisable.exc_value) == "del failed"
... cm.unraisable.exc_traceback is not None
True
True
True