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Add test.test_support.guard_warnings_filter . This function returns a context

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manager that protects warnings.filter from being modified once the context is
exited.
This commit is contained in:
Brett Cannon 2006-12-13 23:09:53 +00:00
parent c745df8519
commit 6d9520c4f0
6 changed files with 37 additions and 26 deletions
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25
Lib/test/test_struct.py
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@ -50,22 +50,17 @@ def any_err(func, *args):
def with_warning_restore(func):
def _with_warning_restore(*args, **kw):
# The `warnings` module doesn't have an advertised way to restore
# its filter list. Cheat.
save_warnings_filters = warnings.filters[:]
# Grrr, we need this function to warn every time. Without removing
# the warningregistry, running test_tarfile then test_struct would fail
# on 64-bit platforms.
globals = func.func_globals
if '__warningregistry__' in globals:
del globals['__warningregistry__']
warnings.filterwarnings("error", r"""^struct.*""", DeprecationWarning)
warnings.filterwarnings("error", r""".*format requires.*""",
DeprecationWarning)
try:
with test.test_support.guard_warnings_filter():
# Grrr, we need this function to warn every time. Without removing
# the warningregistry, running test_tarfile then test_struct would fail
# on 64-bit platforms.
globals = func.func_globals
if '__warningregistry__' in globals:
del globals['__warningregistry__']
warnings.filterwarnings("error", r"""^struct.*""", DeprecationWarning)
warnings.filterwarnings("error", r""".*format requires.*""",
DeprecationWarning)
return func(*args, **kw)
finally:
warnings.filters[:] = save_warnings_filters[:]
return _with_warning_restore
def deprecated_err(func, *args):