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|
# spaceconfig = {"usemodules": ["_warnings"]}
import pytest
import warnings
import _warnings
import io
import os
import sys
def test_defaults():
assert _warnings._onceregistry == {}
assert _warnings._defaultaction == 'default'
expected = [('default', None, DeprecationWarning, '__main__', 0),
('ignore', None, DeprecationWarning, None, 0),
('ignore', None, PendingDeprecationWarning, None, 0),
('ignore', None, ImportWarning, None, 0),
('ignore', None, ResourceWarning, None, 0)]
try:
import pkg_resources
expected.append(('ignore', None, pkg_resources.PEP440Warning, None, 0))
except:
pass
assert expected == _warnings.filters
def test_warn():
_warnings.warn("some message", DeprecationWarning)
_warnings.warn("some message", Warning)
_warnings.warn(("some message",1), Warning)
def test_use_builtin__warnings():
"""Check that the stdlib warnings.py module manages to import our
_warnings module. If something is missing, it doesn't, and silently
continues. Then things don't reliably work: either the
functionality of the pure Python version is subtly different, or
more likely we get confusion because of a half-imported _warnings.
"""
assert not hasattr(warnings, '_filters_version')
def test_lineno():
with warnings.catch_warnings(record=True) as w:
_warnings.warn("some message", Warning)
lineno = sys._getframe().f_lineno - 1 # the line above
assert w[-1].lineno == lineno
def test_warn_explicit():
_warnings.warn_explicit("some message", DeprecationWarning,
"<string>", 1, module_globals=globals())
_warnings.warn_explicit("some message", Warning,
"<string>", 1, module_globals=globals())
def test_with_source():
source = []
with warnings.catch_warnings(record=True) as w:
_warnings.warn("some message", Warning, source=source)
assert w[0].source is source
def test_default_action():
warnings.defaultaction = 'ignore'
warnings.resetwarnings()
with warnings.catch_warnings(record=True) as w:
_warnings.warn_explicit("message", UserWarning, "<test>", 44,
registry={})
assert len(w) == 0
warnings.defaultaction = 'default'
def test_ignore():
warnings.resetwarnings()
with warnings.catch_warnings(record=True) as w:
__warningregistry__ = {}
warnings.filterwarnings("ignore", category=UserWarning)
_warnings.warn_explicit("message", UserWarning, "<test>", 44,
registry=__warningregistry__)
assert len(w) == 0
assert list(__warningregistry__) == ['version']
def test_show_source_line():
# Something is wrong with pytest 4.0.0 (which is the version run for -D
# pypy tests: it cannot redirect sys.stderr
if getattr(pytest, "__version__", "untranslated") == '4.0.0':
pytest.skip("fails on this version of pytest")
def inner(message, stacklevel=1):
warnings.warn(message, stacklevel=stacklevel)
# With showarning() missing, make sure that output is okay.
saved = warnings.showwarning
try:
del warnings.showwarning
stderr = sys.stderr
try:
sys.stderr = io.StringIO()
inner('test message')
result = sys.stderr.getvalue()
finally:
sys.stderr = stderr
assert result.count('\n') == 2
assert ' warnings.warn(message, ' in result
finally:
warnings.showwarning = saved
def test_filename_none():
globals()['__file__'] = 'test.pyc'
_warnings.warn('test', UserWarning)
globals()['__file__'] = None
_warnings.warn('test', UserWarning)
def test_warn_unicode():
# Something is wrong with pytest 4.0.0 (which is the version run for -D
# pypy tests: it cannot redirect sys.stderr
if getattr(pytest, "__version__", "untranslated") == '4.0.0':
pytest.skip("fails on this version of pytest")
old = sys.stderr, warnings.showwarning
try:
class Grab:
def write(self, u):
self.data.append(u)
sys.stderr = Grab()
sys.stderr.data = data = []
if sys.version_info > (3, 0, 0):
# Copy from lib-python/3/warnings.py
def orig_showwarning(message, category, filename, lineno, file=None, line=None):
msg = warnings.WarningMessage(message, category, filename, lineno, file, line)
warnings._showwarnmsg_impl(msg)
warnings.showwarning = orig_showwarning
_unicode = str
else:
warnings.showwarning = warnings._show_warning
_unicode = unicode
# ^^^ disables any catch_warnings() issued by the test runner
_warnings.warn_explicit("9238exbexn8", Warning,
"<string>", 1421, module_globals=globals())
assert data # the warning was not swallowed
assert isinstance(''.join(data), str)
_warnings.warn_explicit(u"\u1234\u5678", UserWarning,
"<str2>", 831, module_globals=globals())
assert isinstance(''.join(data), _unicode)
assert ''.join(data).endswith(
u'<str2>:831: UserWarning: \u1234\u5678\n')
finally:
sys.stderr, warnings.showwarning = old
def test_bad_category():
raises(TypeError, _warnings.warn, "text", 123)
class Foo:
pass
raises(TypeError, _warnings.warn, "text", Foo)
def test_surrogate_in_filename():
for filename in ("nonascii\xe9\u20ac", "surrogate\udc80"):
try:
os.fsencode(filename)
except UnicodeEncodeError:
continue
_warnings.warn_explicit("text", UserWarning, filename, 1)
def test_issue31285():
def get_bad_loader(splitlines_ret_val):
class BadLoader:
def get_source(self, fullname):
class BadSource(str):
def splitlines(self):
return splitlines_ret_val
return BadSource('spam')
return BadLoader()
# does not raise:
_warnings.warn_explicit(
'eggs', UserWarning, 'bar', 1,
module_globals={'__loader__': get_bad_loader(42),
'__name__': 'foobar'})
def test_once_is_not_broken():
def f():
warnings.warn("deprecated", DeprecationWarning, 2)
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("once")
assert len(w) == 0
f()
assert len(w) == 1
f()
assert len(w) == 1
f()
assert len(w) == 1
def test_filename_from_code():
f = eval("lambda: warnings.warn('foo')")
with warnings.catch_warnings(record=True) as w:
assert len(w) == 0
f()
print(w[0].__dict__)
assert len(w) == 1
assert w[0].filename == "<string>"
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