Closed
Description
@nicoddemus Let's continue the discussion from #2945 here, as this probably warrants some deeper investigation.
When trying to run my tests (after some patching), I get various failures in my test_check_coverage.py which runs pytest via pytester and produces a coverage.xml via pytest-cov which it then reads.
Here's how it fails:
___________________________________________________________________________________________________________________________________________________ test_tested_no_branches ___________________________________________________________________________________________________________________________________________________
self = <module 'py.error'>, func = <built-in function open>, args = ('/tmp/pytest-of-florian/pytest-229/test_tested_no_branches0/coverage.xml', 'r'), kwargs = {'encoding': 'utf-8'}, __tracebackhide__ = False, cls = <class 'py.error.ENOENT'>, value = FileNotFoundError(2, 'No such file or directory')
tb = <traceback object at 0x7f5bd063f588>, errno = 2
def checked_call(self, func, *args, **kwargs):
""" call a function and raise an errno-exception if applicable. """
__tracebackhide__ = True
try:
> return func(*args, **kwargs)
E FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pytest-of-florian/pytest-229/test_tested_no_branches0/coverage.xml'
/home/florian/proj/qutebrowser/git/.tox/py36/lib/python3.6/site-packages/py/_error.py:66: FileNotFoundError
During handling of the above exception, another exception occurred:
covtest = <test_check_coverage.CovtestHelper object at 0x7f5bff541cf8>
def test_tested_no_branches(covtest):
covtest.makefile("""
def func():
pass
""")
covtest.run()
> assert covtest.check() == []
/home/florian/proj/qutebrowser/git/tests/unit/scripts/test_check_coverage.py:103:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/home/florian/proj/qutebrowser/git/tests/unit/scripts/test_check_coverage.py:69: in check
with coverage_file.open(encoding='utf-8') as f:
/home/florian/proj/qutebrowser/git/.tox/py36/lib/python3.6/site-packages/py/_path/local.py:360: in open
return py.error.checked_call(io.open, self.strpath, mode, encoding=encoding)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <module 'py.error'>, func = <built-in function open>, args = ('/tmp/pytest-of-florian/pytest-229/test_tested_no_branches0/coverage.xml', 'r'), kwargs = {'encoding': 'utf-8'}, __tracebackhide__ = False, cls = <class 'py.error.ENOENT'>, value = FileNotFoundError(2, 'No such file or directory')
tb = <traceback object at 0x7f5bd063f588>, errno = 2
def checked_call(self, func, *args, **kwargs):
""" call a function and raise an errno-exception if applicable. """
__tracebackhide__ = True
try:
return func(*args, **kwargs)
except self.Error:
raise
except (OSError, EnvironmentError):
cls, value, tb = sys.exc_info()
if not hasattr(value, 'errno'):
raise
__tracebackhide__ = False
errno = value.errno
try:
if not isinstance(value, WindowsError):
raise NameError
except NameError:
# we are not on Windows, or we got a proper OSError
cls = self._geterrnoclass(errno)
else:
try:
cls = self._geterrnoclass(_winerrnomap[errno])
except KeyError:
raise value
> raise cls("%s%r" % (func.__name__, args))
E py.error.ENOENT: [No such file or directory]: open('/tmp/pytest-of-florian/pytest-229/test_tested_no_branches0/coverage.xml', 'r')
/home/florian/proj/qutebrowser/git/.tox/py36/lib/python3.6/site-packages/py/_error.py:86: ENOENT
I was able to bisect it to 333a9ad but that probably also did some kind of pluggy update?