view test/pytest_patcher.py @ 5442:afd9fd3a0edb

Python 3 preparation: avoid assigning to instance __getitem__ in TruthDict. In Python 3, special method names are generally only looked up at the class level, not on instance objects, and so assigning to them for an instance object doesn't work as expected.
author Joseph Myers <jsm@polyomino.org.uk>
date Wed, 25 Jul 2018 12:29:08 +0000
parents 1c94afabb2cb
children
line wrap: on
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"""
The following code was taken from:

    https://github.com/pytest-dev/pytest/issues/568#issuecomment-216569420

to resolve a bug with using pytest.mark.skip(). Once the bug is resolved in
pytest this file can be removed along with all the wrapper mark_class()
references in the other test files.
"""
import types


def mark_class(marker):
    '''Workaround for https://github.com/pytest-dev/pytest/issues/568'''
    def copy_func(f):
        try:
            return types.FunctionType(f.__code__, f.__globals__,
                                      name=f.__name__, argdefs=f.__defaults__,
                                      closure=f.__closure__)
        except AttributeError:
            return types.FunctionType(f.func_code, f.func_globals,
                                      name=f.func_name,
                                      argdefs=f.func_defaults,
                                      closure=f.func_closure)

    def mark(cls):
        if isinstance(cls, types.FunctionType):
            return marker(copy_func(cls))

        for method in dir(cls):
            if method.startswith('test'):
                f = copy_func(getattr(cls, method))
                setattr(cls, method, marker(f))
        return cls
    return mark

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