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"""
python version compatibility code
"""
from __future__ import absolute_import, division, print_function
import sys
import inspect
import types
import re
import functools
import py
import _pytest
from _pytest.outcomes import TEST_OUTCOME
try:
import enum
except ImportError: # pragma: no cover
# Only available in Python 3.4+ or as a backport
enum = None
_PY3 = sys.version_info > (3, 0)
_PY2 = not _PY3
NoneType = type(None)
NOTSET = object()
PY35 = sys.version_info[:2] >= (3, 5)
PY36 = sys.version_info[:2] >= (3, 6)
MODULE_NOT_FOUND_ERROR = 'ModuleNotFoundError' if PY36 else 'ImportError'
if hasattr(inspect, 'signature'):
def _format_args(func):
return str(inspect.signature(func))
else:
def _format_args(func):
return inspect.formatargspec(*inspect.getargspec(func))
isfunction = inspect.isfunction
isclass = inspect.isclass
# used to work around a python2 exception info leak
exc_clear = getattr(sys, 'exc_clear', lambda: None)
# The type of re.compile objects is not exposed in Python.
REGEX_TYPE = type(re.compile(''))
def is_generator(func):
genfunc = inspect.isgeneratorfunction(func)
return genfunc and not iscoroutinefunction(func)
def iscoroutinefunction(func):
"""Return True if func is a decorated coroutine function.
Note: copied and modified from Python 3.5's builtin couroutines.py to avoid import asyncio directly,
which in turns also initializes the "logging" module as side-effect (see issue #8).
"""
return (getattr(func, '_is_coroutine', False) or
(hasattr(inspect, 'iscoroutinefunction') and inspect.iscoroutinefunction(func)))
def getlocation(function, curdir):
import inspect
fn = py.path.local(inspect.getfile(function))
lineno = py.builtin._getcode(function).co_firstlineno
if fn.relto(curdir):
fn = fn.relto(curdir)
return "%s:%d" % (fn, lineno + 1)
def num_mock_patch_args(function):
""" return number of arguments used up by mock arguments (if any) """
patchings = getattr(function, "patchings", None)
if not patchings:
return 0
mock = sys.modules.get("mock", sys.modules.get("unittest.mock", None))
if mock is not None:
return len([p for p in patchings
if not p.attribute_name and p.new is mock.DEFAULT])
return len(patchings)
def getfuncargnames(function, startindex=None, cls=None):
"""
@RonnyPfannschmidt: This function should be refactored when we revisit fixtures. The
fixture mechanism should ask the node for the fixture names, and not try to obtain
directly from the function object well after collection has occurred.
"""
if startindex is None and cls is not None:
is_staticmethod = isinstance(cls.__dict__.get(function.__name__, None), staticmethod)
startindex = 0 if is_staticmethod else 1
# XXX merge with main.py's varnames
# assert not isclass(function)
realfunction = function
while hasattr(realfunction, "__wrapped__"):
realfunction = realfunction.__wrapped__
if startindex is None:
startindex = inspect.ismethod(function) and 1 or 0
if realfunction != function:
startindex += num_mock_patch_args(function)
function = realfunction
if isinstance(function, functools.partial):
argnames = inspect.getargs(_pytest._code.getrawcode(function.func))[0]
partial = function
argnames = argnames[len(partial.args):]
if partial.keywords:
for kw in partial.keywords:
argnames.remove(kw)
else:
argnames = inspect.getargs(_pytest._code.getrawcode(function))[0]
defaults = getattr(function, 'func_defaults',
getattr(function, '__defaults__', None)) or ()
numdefaults = len(defaults)
if numdefaults:
return tuple(argnames[startindex:-numdefaults])
return tuple(argnames[startindex:])
if sys.version_info[:2] == (2, 6):
def isclass(object):
""" Return true if the object is a class. Overrides inspect.isclass for
python 2.6 because it will return True for objects which always return
something on __getattr__ calls (see #1035).
Backport of https://hg.python.org/cpython/rev/35bf8f7a8edc
"""
return isinstance(object, (type, types.ClassType))
if _PY3:
import codecs
imap = map
izip = zip
STRING_TYPES = bytes, str
UNICODE_TYPES = str,
def _ascii_escaped(val):
"""If val is pure ascii, returns it as a str(). Otherwise, escapes
bytes objects into a sequence of escaped bytes:
b'\xc3\xb4\xc5\xd6' -> u'\\xc3\\xb4\\xc5\\xd6'
and escapes unicode objects into a sequence of escaped unicode
ids, e.g.:
'4\\nV\\U00043efa\\x0eMXWB\\x1e\\u3028\\u15fd\\xcd\\U0007d944'
note:
the obvious "v.decode('unicode-escape')" will return
valid utf-8 unicode if it finds them in bytes, but we
want to return escaped bytes for any byte, even if they match
a utf-8 string.
"""
if isinstance(val, bytes):
if val:
# source: http://goo.gl/bGsnwC
encoded_bytes, _ = codecs.escape_encode(val)
return encoded_bytes.decode('ascii')
else:
# empty bytes crashes codecs.escape_encode (#1087)
return ''
else:
return val.encode('unicode_escape').decode('ascii')
else:
STRING_TYPES = bytes, str, unicode
UNICODE_TYPES = unicode,
from itertools import imap, izip # NOQA
def _ascii_escaped(val):
"""In py2 bytes and str are the same type, so return if it's a bytes
object, return it unchanged if it is a full ascii string,
otherwise escape it into its binary form.
If it's a unicode string, change the unicode characters into
unicode escapes.
"""
if isinstance(val, bytes):
try:
return val.encode('ascii')
except UnicodeDecodeError:
return val.encode('string-escape')
else:
return val.encode('unicode-escape')
def get_real_func(obj):
""" gets the real function object of the (possibly) wrapped object by
functools.wraps or functools.partial.
"""
start_obj = obj
for i in range(100):
new_obj = getattr(obj, '__wrapped__', None)
if new_obj is None:
break
obj = new_obj
else:
raise ValueError(
("could not find real function of {start}"
"\nstopped at {current}").format(
start=py.io.saferepr(start_obj),
current=py.io.saferepr(obj)))
if isinstance(obj, functools.partial):
obj = obj.func
return obj
def getfslineno(obj):
# xxx let decorators etc specify a sane ordering
obj = get_real_func(obj)
if hasattr(obj, 'place_as'):
obj = obj.place_as
fslineno = _pytest._code.getfslineno(obj)
assert isinstance(fslineno[1], int), obj
return fslineno
def getimfunc(func):
try:
return func.__func__
except AttributeError:
try:
return func.im_func
except AttributeError:
return func
def safe_getattr(object, name, default):
""" Like getattr but return default upon any Exception or any OutcomeException.
Attribute access can potentially fail for 'evil' Python objects.
See issue #214.
It catches OutcomeException because of #2490 (issue #580), new outcomes are derived from BaseException
instead of Exception (for more details check #2707)
"""
try:
return getattr(object, name, default)
except TEST_OUTCOME:
return default
def _is_unittest_unexpected_success_a_failure():
"""Return if the test suite should fail if a @expectedFailure unittest test PASSES.
From https://docs.python.org/3/library/unittest.html?highlight=unittest#unittest.TestResult.wasSuccessful:
Changed in version 3.4: Returns False if there were any
unexpectedSuccesses from tests marked with the expectedFailure() decorator.
"""
return sys.version_info >= (3, 4)
if _PY3:
def safe_str(v):
"""returns v as string"""
return str(v)
else:
def safe_str(v):
"""returns v as string, converting to ascii if necessary"""
try:
return str(v)
except UnicodeError:
if not isinstance(v, unicode):
v = unicode(v)
errors = 'replace'
return v.encode('utf-8', errors)
COLLECT_FAKEMODULE_ATTRIBUTES = (
'Collector',
'Module',
'Generator',
'Function',
'Instance',
'Session',
'Item',
'Class',
'File',
'_fillfuncargs',
)
def _setup_collect_fakemodule():
from types import ModuleType
import pytest
pytest.collect = ModuleType('pytest.collect')
pytest.collect.__all__ = [] # used for setns
for attr in COLLECT_FAKEMODULE_ATTRIBUTES:
setattr(pytest.collect, attr, getattr(pytest, attr))
if _PY2:
# Without this the test_dupfile_on_textio will fail, otherwise CaptureIO could directly inherit from StringIO.
from py.io import TextIO
class CaptureIO(TextIO):
@property
def encoding(self):
return getattr(self, '_encoding', 'UTF-8')
else:
import io
class CaptureIO(io.TextIOWrapper):
def __init__(self):
super(CaptureIO, self).__init__(
io.BytesIO(),
encoding='UTF-8', newline='', write_through=True,
)
def getvalue(self):
return self.buffer.getvalue().decode('UTF-8')
class FuncargnamesCompatAttr(object):
""" helper class so that Metafunc, Function and FixtureRequest
don't need to each define the "funcargnames" compatibility attribute.
"""
@property
def funcargnames(self):
""" alias attribute for ``fixturenames`` for pre-2.3 compatibility"""
return self.fixturenames
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