test_support.py 文件源码

def __new__(mcs, name, bases, classdict, **kwargs):
        """__new__ method of metaclass."""
        # TODO: maybe this could be just put in the base class instead of in
        # the meta class.
        def assert_X_from_iterables(self, x=lambda: True, *args, **kwargs):
            func = getattr(self, x.__name__, x)
            for i, zipargs in enumerate(zip(*args)):
                with self.subTest(iteration=i, arguments=zipargs):
                    func(*zipargs)
            return None
        classdict['assert_X_from_iterables'] = assert_X_from_iterables

        @property
        def verbose(cls):
            """Return the verbosity setting of the currently running unittest.

            This function 'scans' the frame looking for a 'cls' variable.

            Returns:
                int: the verbosity level.

                0 if this is the __main__ file
                1 if run with unittests module without verbosity (default in
                TestProgram)
                2 if run with unittests module with verbosity

            """
            frame = inspect.currentframe()
            # Scans frames from innermost to outermost for a TestProgram
            # instance.  This python object has a verbosity defined in it.
            while frame:
                cls = frame.f_locals.get('cls')
                if isinstance(cls, unittest.TestProgram):
                    return cls.verbose
                # Proceed to one outer frame.
                frame = frame.f_back
            return 0
        # METACLASS: set verbosity.
        classdict['verbose'] = verbose
        return type.__new__(mcs, name, bases, classdict)