..     {'op': 'add', 'path': '/baz', 'value': [1, 2, 3]},
    ...     {'op': 'remove', 'path': '/baz/1'},
    ...     {'op': 'test', 'path': '/baz', 'value': [1, 3]},
    ...     {'op': 'replace', 'path': '/baz/0', 'value': 42},
    ...     {'op': 'remove', 'path': '/baz/1'},
    ... ])
    >>> doc = {}
    >>> result = patch.apply(doc)
    >>> expected = {'foo': 'bar', 'baz': [42]}
    >>> result == expected
    True

    JsonPatch object is iterable, so you could easily access to each patch
    statement in loop:

    >>> lpatch = list(patch)
    >>> expected = {'op': 'add', 'path': '/foo', 'value': 'bar'}
    >>> lpatch[0] == expected
    True
    >>> lpatch == patch.patch
    True

    Also JsonPatch could be converted directly to :class:`bool` if it contains
    any operation statements:

    >>> bool(patch)
    True
    >>> bool(JsonPatch([]))
    False

    This behavior is very handy with :func:`make_patch` to write more readable
    code:

    >>> old = {'foo': 'bar', 'numbers': [1, 3, 4, 8]}
    >>> new = {'baz': 'qux', 'numbers': [1, 4, 7]}
    >>> patch = make_patch(old, new)
    >>> if patch:
    ...     # document have changed, do something useful
    ...     patch.apply(old)    #doctest: +ELLIPSIS
    {...}
    c