def allow_constructor()

in doubles/targets/allowance_target.py [0:0]

• 6 lines of code
• 2 McCabe index (conditional complexity)

def allow_constructor(target):
    """
    Set an allowance on a ``ClassDouble`` constructor

    This allows the caller to control what a ClassDouble returns when a new instance is created.

    :param ClassDouble target:  The ClassDouble to set the allowance on.
    :return: an ``Allowance`` for the __new__ method.
    :raise: ``ConstructorDoubleError`` if target is not a ClassDouble.
    """
    if not isinstance(target, ClassDouble):
        raise ConstructorDoubleError(
            'Cannot allow_constructor of {} since it is not a ClassDouble.'.format(target),
        )

    return allow(target)._doubles__new__