Method mockable

python/python3/tornado/options.py:481–496

Returns a wrapper around self that is compatible with `mock.patch `. The `mock.patch ` function (included in the standard library `unittest.mock` package since Python 3.3, or in the third-party ``mock`` package for older vers

(self)

            callback()

    def mockable(self) -> "_Mockable":
        """Returns a wrapper around self that is compatible with
        `mock.patch <unittest.mock.patch>`.

        The `mock.patch <unittest.mock.patch>` function (included in
        the standard library `unittest.mock` package since Python 3.3,
        or in the third-party ``mock`` package for older versions of
        Python) is incompatible with objects like ``options`` that
        override ``__getattr__`` and ``__setattr__``.  This function
        returns an object that can be used with `mock.patch.object
        <unittest.mock.patch.object>` to modify option values::

            with mock.patch.object(options.mockable(), 'name', value):
                assert options.name == value
        """
        return _Mockable(self)


class _Mockable(object):