diff --git a/third_party/pymock/LICENSE.txt b/third_party/pymock/LICENSE.txt
deleted file mode 100644
index 7891703..0000000
--- a/third_party/pymock/LICENSE.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-Copyright (c) 2003-2012, Michael Foord
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-
-    * Redistributions in binary form must reproduce the above
-      copyright notice, this list of conditions and the following
-      disclaimer in the documentation and/or other materials provided
-      with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/third_party/pymock/OWNERS b/third_party/pymock/OWNERS
deleted file mode 100644
index 9946560..0000000
--- a/third_party/pymock/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-sbc@chromium.org
diff --git a/third_party/pymock/README.chromium b/third_party/pymock/README.chromium
deleted file mode 100644
index 1db90f7..0000000
--- a/third_party/pymock/README.chromium
+++ /dev/null
@@ -1,12 +0,0 @@
-Name: mock
-URL: http://pypi.python.org/pypi/mock
-Version: 1.0.1
-Security Critical: no
-Shipped: no
-License: BSD-2-Clause
-License File: LICENSE.txt
-
-Description:
-Python mock library, currently used by native_client_sdk.  This is the
-same mock library that is now part of python 3.3 where it is know as
-unittest.mock.
diff --git a/third_party/pymock/mock.py b/third_party/pymock/mock.py
deleted file mode 100644
index c8fc5d1..0000000
--- a/third_party/pymock/mock.py
+++ /dev/null
@@ -1,2367 +0,0 @@
-# mock.py
-# Test tools for mocking and patching.
-# Copyright (C) 2007-2012 Michael Foord & the mock team
-# E-mail: fuzzyman AT voidspace DOT org DOT uk
-
-# mock 1.0
-# http://www.voidspace.org.uk/python/mock/
-
-# Released subject to the BSD License
-# Please see http://www.voidspace.org.uk/python/license.shtml
-
-# Scripts maintained at http://www.voidspace.org.uk/python/index.shtml
-# Comments, suggestions and bug reports welcome.
-
-
-__all__ = (
-    'Mock',
-    'MagicMock',
-    'patch',
-    'sentinel',
-    'DEFAULT',
-    'ANY',
-    'call',
-    'create_autospec',
-    'FILTER_DIR',
-    'NonCallableMock',
-    'NonCallableMagicMock',
-    'mock_open',
-    'PropertyMock',
-)
-
-
-__version__ = '1.0.1'
-
-
-import pprint
-import sys
-
-try:
-    import inspect
-except ImportError:
-    # for alternative platforms that
-    # may not have inspect
-    inspect = None
-
-try:
-    from functools import wraps as original_wraps
-except ImportError:
-    # Python 2.4 compatibility
-    def wraps(original):
-        def inner(f):
-            f.__name__ = original.__name__
-            f.__doc__ = original.__doc__
-            f.__module__ = original.__module__
-            f.__wrapped__ = original
-            return f
-        return inner
-else:
-    if sys.version_info[:2] >= (3, 3):
-        wraps = original_wraps
-    else:
-        def wraps(func):
-            def inner(f):
-                f = original_wraps(func)(f)
-                f.__wrapped__ = func
-                return f
-            return inner
-
-try:
-    unicode
-except NameError:
-    # Python 3
-    basestring = unicode = str
-
-try:
-    long
-except NameError:
-    # Python 3
-    long = int
-
-try:
-    BaseException
-except NameError:
-    # Python 2.4 compatibility
-    BaseException = Exception
-
-try:
-    next
-except NameError:
-    def next(obj):
-        return obj.next()
-
-
-BaseExceptions = (BaseException,)
-if 'java' in sys.platform:
-    # jython
-    import java
-    BaseExceptions = (BaseException, java.lang.Throwable)
-
-try:
-    _isidentifier = str.isidentifier
-except AttributeError:
-    # Python 2.X
-    import keyword
-    import re
-    regex = re.compile(r'^[a-z_][a-z0-9_]*$', re.I)
-    def _isidentifier(string):
-        if string in keyword.kwlist:
-            return False
-        return regex.match(string)
-
-
-inPy3k = sys.version_info[0] == 3
-
-# Needed to work around Python 3 bug where use of "super" interferes with
-# defining __class__ as a descriptor
-_super = super
-
-self = 'im_self'
-builtin = '__builtin__'
-if inPy3k:
-    self = '__self__'
-    builtin = 'builtins'
-
-FILTER_DIR = True
-
-
-def _is_instance_mock(obj):
-    # can't use isinstance on Mock objects because they override __class__
-    # The base class for all mocks is NonCallableMock
-    return issubclass(type(obj), NonCallableMock)
-
-
-def _is_exception(obj):
-    return (
-        isinstance(obj, BaseExceptions) or
-        isinstance(obj, ClassTypes) and issubclass(obj, BaseExceptions)
-    )
-
-
-class _slotted(object):
-    __slots__ = ['a']
-
-
-DescriptorTypes = (
-    type(_slotted.a),
-    property,
-)
-
-
-def _getsignature(func, skipfirst, instance=False):
-    if inspect is None:
-        raise ImportError('inspect module not available')
-
-    if isinstance(func, ClassTypes) and not instance:
-        try:
-            func = func.__init__
-        except AttributeError:
-            return
-        skipfirst = True
-    elif not isinstance(func, FunctionTypes):
-        # for classes where instance is True we end up here too
-        try:
-            func = func.__call__
-        except AttributeError:
-            return
-
-    if inPy3k:
-        try:
-            argspec = inspect.getfullargspec(func)
-        except TypeError:
-            # C function / method, possibly inherited object().__init__
-            return
-        regargs, varargs, varkw, defaults, kwonly, kwonlydef, ann = argspec
-    else:
-        try:
-            regargs, varargs, varkwargs, defaults = inspect.getargspec(func)
-        except TypeError:
-            # C function / method, possibly inherited object().__init__
-            return
-
-    # instance methods and classmethods need to lose the self argument
-    if getattr(func, self, None) is not None:
-        regargs = regargs[1:]
-    if skipfirst:
-        # this condition and the above one are never both True - why?
-        regargs = regargs[1:]
-
-    if inPy3k:
-        signature = inspect.formatargspec(
-            regargs, varargs, varkw, defaults,
-            kwonly, kwonlydef, ann, formatvalue=lambda value: "")
-    else:
-        signature = inspect.formatargspec(
-            regargs, varargs, varkwargs, defaults,
-            formatvalue=lambda value: "")
-    return signature[1:-1], func
-
-
-def _check_signature(func, mock, skipfirst, instance=False):
-    if not _callable(func):
-        return
-
-    result = _getsignature(func, skipfirst, instance)
-    if result is None:
-        return
-    signature, func = result
-
-    # can't use self because "self" is common as an argument name
-    # unfortunately even not in the first place
-    src = "lambda _mock_self, %s: None" % signature
-    checksig = eval(src, {})
-    _copy_func_details(func, checksig)
-    type(mock)._mock_check_sig = checksig
-
-
-def _copy_func_details(func, funcopy):
-    funcopy.__name__ = func.__name__
-    funcopy.__doc__ = func.__doc__
-    #funcopy.__dict__.update(func.__dict__)
-    funcopy.__module__ = func.__module__
-    if not inPy3k:
-        funcopy.func_defaults = func.func_defaults
-        return
-    funcopy.__defaults__ = func.__defaults__
-    funcopy.__kwdefaults__ = func.__kwdefaults__
-
-
-def _callable(obj):
-    if isinstance(obj, ClassTypes):
-        return True
-    if getattr(obj, '__call__', None) is not None:
-        return True
-    return False
-
-
-def _is_list(obj):
-    # checks for list or tuples
-    # XXXX badly named!
-    return type(obj) in (list, tuple)
-
-
-def _instance_callable(obj):
-    """Given an object, return True if the object is callable.
-    For classes, return True if instances would be callable."""
-    if not isinstance(obj, ClassTypes):
-        # already an instance
-        return getattr(obj, '__call__', None) is not None
-
-    klass = obj
-    # uses __bases__ instead of __mro__ so that we work with old style classes
-    if klass.__dict__.get('__call__') is not None:
-        return True
-
-    for base in klass.__bases__:
-        if _instance_callable(base):
-            return True
-    return False
-
-
-def _set_signature(mock, original, instance=False):
-    # creates a function with signature (*args, **kwargs) that delegates to a
-    # mock. It still does signature checking by calling a lambda with the same
-    # signature as the original.
-    if not _callable(original):
-        return
-
-    skipfirst = isinstance(original, ClassTypes)
-    result = _getsignature(original, skipfirst, instance)
-    if result is None:
-        # was a C function (e.g. object().__init__ ) that can't be mocked
-        return
-
-    signature, func = result
-
-    src = "lambda %s: None" % signature
-    checksig = eval(src, {})
-    _copy_func_details(func, checksig)
-
-    name = original.__name__
-    if not _isidentifier(name):
-        name = 'funcopy'
-    context = {'_checksig_': checksig, 'mock': mock}
-    src = """def %s(*args, **kwargs):
-    _checksig_(*args, **kwargs)
-    return mock(*args, **kwargs)""" % name
-    exec (src, context)
-    funcopy = context[name]
-    _setup_func(funcopy, mock)
-    return funcopy
-
-
-def _setup_func(funcopy, mock):
-    funcopy.mock = mock
-
-    # can't use isinstance with mocks
-    if not _is_instance_mock(mock):
-        return
-
-    def assert_called_with(*args, **kwargs):
-        return mock.assert_called_with(*args, **kwargs)
-    def assert_called_once_with(*args, **kwargs):
-        return mock.assert_called_once_with(*args, **kwargs)
-    def assert_has_calls(*args, **kwargs):
-        return mock.assert_has_calls(*args, **kwargs)
-    def assert_any_call(*args, **kwargs):
-        return mock.assert_any_call(*args, **kwargs)
-    def reset_mock():
-        funcopy.method_calls = _CallList()
-        funcopy.mock_calls = _CallList()
-        mock.reset_mock()
-        ret = funcopy.return_value
-        if _is_instance_mock(ret) and not ret is mock:
-            ret.reset_mock()
-
-    funcopy.called = False
-    funcopy.call_count = 0
-    funcopy.call_args = None
-    funcopy.call_args_list = _CallList()
-    funcopy.method_calls = _CallList()
-    funcopy.mock_calls = _CallList()
-
-    funcopy.return_value = mock.return_value
-    funcopy.side_effect = mock.side_effect
-    funcopy._mock_children = mock._mock_children
-
-    funcopy.assert_called_with = assert_called_with
-    funcopy.assert_called_once_with = assert_called_once_with
-    funcopy.assert_has_calls = assert_has_calls
-    funcopy.assert_any_call = assert_any_call
-    funcopy.reset_mock = reset_mock
-
-    mock._mock_delegate = funcopy
-
-
-def _is_magic(name):
-    return '__%s__' % name[2:-2] == name
-
-
-class _SentinelObject(object):
-    "A unique, named, sentinel object."
-    def __init__(self, name):
-        self.name = name
-
-    def __repr__(self):
-        return 'sentinel.%s' % self.name
-
-
-class _Sentinel(object):
-    """Access attributes to return a named object, usable as a sentinel."""
-    def __init__(self):
-        self._sentinels = {}
-
-    def __getattr__(self, name):
-        if name == '__bases__':
-            # Without this help(mock) raises an exception
-            raise AttributeError
-        return self._sentinels.setdefault(name, _SentinelObject(name))
-
-
-sentinel = _Sentinel()
-
-DEFAULT = sentinel.DEFAULT
-_missing = sentinel.MISSING
-_deleted = sentinel.DELETED
-
-
-class OldStyleClass:
-    pass
-ClassType = type(OldStyleClass)
-
-
-def _copy(value):
-    if type(value) in (dict, list, tuple, set):
-        return type(value)(value)
-    return value
-
-
-ClassTypes = (type,)
-if not inPy3k:
-    ClassTypes = (type, ClassType)
-
-_allowed_names = set(
-    [
-        'return_value', '_mock_return_value', 'side_effect',
-        '_mock_side_effect', '_mock_parent', '_mock_new_parent',
-        '_mock_name', '_mock_new_name'
-    ]
-)
-
-
-def _delegating_property(name):
-    _allowed_names.add(name)
-    _the_name = '_mock_' + name
-    def _get(self, name=name, _the_name=_the_name):
-        sig = self._mock_delegate
-        if sig is None:
-            return getattr(self, _the_name)
-        return getattr(sig, name)
-    def _set(self, value, name=name, _the_name=_the_name):
-        sig = self._mock_delegate
-        if sig is None:
-            self.__dict__[_the_name] = value
-        else:
-            setattr(sig, name, value)
-
-    return property(_get, _set)
-
-
-
-class _CallList(list):
-
-    def __contains__(self, value):
-        if not isinstance(value, list):
-            return list.__contains__(self, value)
-        len_value = len(value)
-        len_self = len(self)
-        if len_value > len_self:
-            return False
-
-        for i in range(0, len_self - len_value + 1):
-            sub_list = self[i:i+len_value]
-            if sub_list == value:
-                return True
-        return False
-
-    def __repr__(self):
-        return pprint.pformat(list(self))
-
-
-def _check_and_set_parent(parent, value, name, new_name):
-    if not _is_instance_mock(value):
-        return False
-    if ((value._mock_name or value._mock_new_name) or
-        (value._mock_parent is not None) or
-        (value._mock_new_parent is not None)):
-        return False
-
-    _parent = parent
-    while _parent is not None:
-        # setting a mock (value) as a child or return value of itself
-        # should not modify the mock
-        if _parent is value:
-            return False
-        _parent = _parent._mock_new_parent
-
-    if new_name:
-        value._mock_new_parent = parent
-        value._mock_new_name = new_name
-    if name:
-        value._mock_parent = parent
-        value._mock_name = name
-    return True
-
-
-
-class Base(object):
-    _mock_return_value = DEFAULT
-    _mock_side_effect = None
-    def __init__(self, *args, **kwargs):
-        pass
-
-
-
-class NonCallableMock(Base):
-    """A non-callable version of `Mock`"""
-
-    def __new__(cls, *args, **kw):
-        # every instance has its own class
-        # so we can create magic methods on the
-        # class without stomping on other mocks
-        new = type(cls.__name__, (cls,), {'__doc__': cls.__doc__})
-        instance = object.__new__(new)
-        return instance
-
-
-    def __init__(
-            self, spec=None, wraps=None, name=None, spec_set=None,
-            parent=None, _spec_state=None, _new_name='', _new_parent=None,
-            **kwargs
-        ):
-        if _new_parent is None:
-            _new_parent = parent
-
-        __dict__ = self.__dict__
-        __dict__['_mock_parent'] = parent
-        __dict__['_mock_name'] = name
-        __dict__['_mock_new_name'] = _new_name
-        __dict__['_mock_new_parent'] = _new_parent
-
-        if spec_set is not None:
-            spec = spec_set
-            spec_set = True
-
-        self._mock_add_spec(spec, spec_set)
-
-        __dict__['_mock_children'] = {}
-        __dict__['_mock_wraps'] = wraps
-        __dict__['_mock_delegate'] = None
-
-        __dict__['_mock_called'] = False
-        __dict__['_mock_call_args'] = None
-        __dict__['_mock_call_count'] = 0
-        __dict__['_mock_call_args_list'] = _CallList()
-        __dict__['_mock_mock_calls'] = _CallList()
-
-        __dict__['method_calls'] = _CallList()
-
-        if kwargs:
-            self.configure_mock(**kwargs)
-
-        _super(NonCallableMock, self).__init__(
-            spec, wraps, name, spec_set, parent,
-            _spec_state
-        )
-
-
-    def attach_mock(self, mock, attribute):
-        """
-        Attach a mock as an attribute of this one, replacing its name and
-        parent. Calls to the attached mock will be recorded in the
-        `method_calls` and `mock_calls` attributes of this one."""
-        mock._mock_parent = None
-        mock._mock_new_parent = None
-        mock._mock_name = ''
-        mock._mock_new_name = None
-
-        setattr(self, attribute, mock)
-
-
-    def mock_add_spec(self, spec, spec_set=False):
-        """Add a spec to a mock. `spec` can either be an object or a
-        list of strings. Only attributes on the `spec` can be fetched as
-        attributes from the mock.
-
-        If `spec_set` is True then only attributes on the spec can be set."""
-        self._mock_add_spec(spec, spec_set)
-
-
-    def _mock_add_spec(self, spec, spec_set):
-        _spec_class = None
-
-        if spec is not None and not _is_list(spec):
-            if isinstance(spec, ClassTypes):
-                _spec_class = spec
-            else:
-                _spec_class = _get_class(spec)
-
-            spec = dir(spec)
-
-        __dict__ = self.__dict__
-        __dict__['_spec_class'] = _spec_class
-        __dict__['_spec_set'] = spec_set
-        __dict__['_mock_methods'] = spec
-
-
-    def __get_return_value(self):
-        ret = self._mock_return_value
-        if self._mock_delegate is not None:
-            ret = self._mock_delegate.return_value
-
-        if ret is DEFAULT:
-            ret = self._get_child_mock(
-                _new_parent=self, _new_name='()'
-            )
-            self.return_value = ret
-        return ret
-
-
-    def __set_return_value(self, value):
-        if self._mock_delegate is not None:
-            self._mock_delegate.return_value = value
-        else:
-            self._mock_return_value = value
-            _check_and_set_parent(self, value, None, '()')
-
-    __return_value_doc = "The value to be returned when the mock is called."
-    return_value = property(__get_return_value, __set_return_value,
-                            __return_value_doc)
-
-
-    @property
-    def __class__(self):
-        if self._spec_class is None:
-            return type(self)
-        return self._spec_class
-
-    called = _delegating_property('called')
-    call_count = _delegating_property('call_count')
-    call_args = _delegating_property('call_args')
-    call_args_list = _delegating_property('call_args_list')
-    mock_calls = _delegating_property('mock_calls')
-
-
-    def __get_side_effect(self):
-        sig = self._mock_delegate
-        if sig is None:
-            return self._mock_side_effect
-        return sig.side_effect
-
-    def __set_side_effect(self, value):
-        value = _try_iter(value)
-        sig = self._mock_delegate
-        if sig is None:
-            self._mock_side_effect = value
-        else:
-            sig.side_effect = value
-
-    side_effect = property(__get_side_effect, __set_side_effect)
-
-
-    def reset_mock(self):
-        "Restore the mock object to its initial state."
-        self.called = False
-        self.call_args = None
-        self.call_count = 0
-        self.mock_calls = _CallList()
-        self.call_args_list = _CallList()
-        self.method_calls = _CallList()
-
-        for child in self._mock_children.values():
-            if isinstance(child, _SpecState):
-                continue
-            child.reset_mock()
-
-        ret = self._mock_return_value
-        if _is_instance_mock(ret) and ret is not self:
-            ret.reset_mock()
-
-
-    def configure_mock(self, **kwargs):
-        """Set attributes on the mock through keyword arguments.
-
-        Attributes plus return values and side effects can be set on child
-        mocks using standard dot notation and unpacking a dictionary in the
-        method call:
-
-        >>> attrs = {'method.return_value': 3, 'other.side_effect': KeyError}
-        >>> mock.configure_mock(**attrs)"""
-        for arg, val in sorted(kwargs.items(),
-                               # we sort on the number of dots so that
-                               # attributes are set before we set attributes on
-                               # attributes
-                               key=lambda entry: entry[0].count('.')):
-            args = arg.split('.')
-            final = args.pop()
-            obj = self
-            for entry in args:
-                obj = getattr(obj, entry)
-            setattr(obj, final, val)
-
-
-    def __getattr__(self, name):
-        if name == '_mock_methods':
-            raise AttributeError(name)
-        elif self._mock_methods is not None:
-            if name not in self._mock_methods or name in _all_magics:
-                raise AttributeError("Mock object has no attribute %r" % name)
-        elif _is_magic(name):
-            raise AttributeError(name)
-
-        result = self._mock_children.get(name)
-        if result is _deleted:
-            raise AttributeError(name)
-        elif result is None:
-            wraps = None
-            if self._mock_wraps is not None:
-                # XXXX should we get the attribute without triggering code
-                # execution?
-                wraps = getattr(self._mock_wraps, name)
-
-            result = self._get_child_mock(
-                parent=self, name=name, wraps=wraps, _new_name=name,
-                _new_parent=self
-            )
-            self._mock_children[name]  = result
-
-        elif isinstance(result, _SpecState):
-            result = create_autospec(
-                result.spec, result.spec_set, result.instance,
-                result.parent, result.name
-            )
-            self._mock_children[name]  = result
-
-        return result
-
-
-    def __repr__(self):
-        _name_list = [self._mock_new_name]
-        _parent = self._mock_new_parent
-        last = self
-
-        dot = '.'
-        if _name_list == ['()']:
-            dot = ''
-        seen = set()
-        while _parent is not None:
-            last = _parent
-
-            _name_list.append(_parent._mock_new_name + dot)
-            dot = '.'
-            if _parent._mock_new_name == '()':
-                dot = ''
-
-            _parent = _parent._mock_new_parent
-
-            # use ids here so as not to call __hash__ on the mocks
-            if id(_parent) in seen:
-                break
-            seen.add(id(_parent))
-
-        _name_list = list(reversed(_name_list))
-        _first = last._mock_name or 'mock'
-        if len(_name_list) > 1:
-            if _name_list[1] not in ('()', '().'):
-                _first += '.'
-        _name_list[0] = _first
-        name = ''.join(_name_list)
-
-        name_string = ''
-        if name not in ('mock', 'mock.'):
-            name_string = ' name=%r' % name
-
-        spec_string = ''
-        if self._spec_class is not None:
-            spec_string = ' spec=%r'
-            if self._spec_set:
-                spec_string = ' spec_set=%r'
-            spec_string = spec_string % self._spec_class.__name__
-        return "<%s%s%s id='%s'>" % (
-            type(self).__name__,
-            name_string,
-            spec_string,
-            id(self)
-        )
-
-
-    def __dir__(self):
-        """Filter the output of `dir(mock)` to only useful members.
-        XXXX
-        """
-        extras = self._mock_methods or []
-        from_type = dir(type(self))
-        from_dict = list(self.__dict__)
-
-        if FILTER_DIR:
-            from_type = [e for e in from_type if not e.startswith('_')]
-            from_dict = [e for e in from_dict if not e.startswith('_') or
-                         _is_magic(e)]
-        return sorted(set(extras + from_type + from_dict +
-                          list(self._mock_children)))
-
-
-    def __setattr__(self, name, value):
-        if name in _allowed_names:
-            # property setters go through here
-            return object.__setattr__(self, name, value)
-        elif (self._spec_set and self._mock_methods is not None and
-            name not in self._mock_methods and
-            name not in self.__dict__):
-            raise AttributeError("Mock object has no attribute '%s'" % name)
-        elif name in _unsupported_magics:
-            msg = 'Attempting to set unsupported magic method %r.' % name
-            raise AttributeError(msg)
-        elif name in _all_magics:
-            if self._mock_methods is not None and name not in self._mock_methods:
-                raise AttributeError("Mock object has no attribute '%s'" % name)
-
-            if not _is_instance_mock(value):
-                setattr(type(self), name, _get_method(name, value))
-                original = value
-                value = lambda *args, **kw: original(self, *args, **kw)
-            else:
-                # only set _new_name and not name so that mock_calls is tracked
-                # but not method calls
-                _check_and_set_parent(self, value, None, name)
-                setattr(type(self), name, value)
-                self._mock_children[name] = value
-        elif name == '__class__':
-            self._spec_class = value
-            return
-        else:
-            if _check_and_set_parent(self, value, name, name):
-                self._mock_children[name] = value
-        return object.__setattr__(self, name, value)
-
-
-    def __delattr__(self, name):
-        if name in _all_magics and name in type(self).__dict__:
-            delattr(type(self), name)
-            if name not in self.__dict__:
-                # for magic methods that are still MagicProxy objects and
-                # not set on the instance itself
-                return
-
-        if name in self.__dict__:
-            object.__delattr__(self, name)
-
-        obj = self._mock_children.get(name, _missing)
-        if obj is _deleted:
-            raise AttributeError(name)
-        if obj is not _missing:
-            del self._mock_children[name]
-        self._mock_children[name] = _deleted
-
-
-
-    def _format_mock_call_signature(self, args, kwargs):
-        name = self._mock_name or 'mock'
-        return _format_call_signature(name, args, kwargs)
-
-
-    def _format_mock_failure_message(self, args, kwargs):
-        message = 'Expected call: %s\nActual call: %s'
-        expected_string = self._format_mock_call_signature(args, kwargs)
-        call_args = self.call_args
-        if len(call_args) == 3:
-            call_args = call_args[1:]
-        actual_string = self._format_mock_call_signature(*call_args)
-        return message % (expected_string, actual_string)
-
-
-    def assert_called_with(_mock_self, *args, **kwargs):
-        """assert that the mock was called with the specified arguments.
-
-        Raises an AssertionError if the args and keyword args passed in are
-        different to the last call to the mock."""
-        self = _mock_self
-        if self.call_args is None:
-            expected = self._format_mock_call_signature(args, kwargs)
-            raise AssertionError('Expected call: %s\nNot called' % (expected,))
-
-        if self.call_args != (args, kwargs):
-            msg = self._format_mock_failure_message(args, kwargs)
-            raise AssertionError(msg)
-
-
-    def assert_called_once_with(_mock_self, *args, **kwargs):
-        """assert that the mock was called exactly once and with the specified
-        arguments."""
-        self = _mock_self
-        if not self.call_count == 1:
-            msg = ("Expected to be called once. Called %s times." %
-                   self.call_count)
-            raise AssertionError(msg)
-        return self.assert_called_with(*args, **kwargs)
-
-
-    def assert_has_calls(self, calls, any_order=False):
-        """assert the mock has been called with the specified calls.
-        The `mock_calls` list is checked for the calls.
-
-        If `any_order` is False (the default) then the calls must be
-        sequential. There can be extra calls before or after the
-        specified calls.
-
-        If `any_order` is True then the calls can be in any order, but
-        they must all appear in `mock_calls`."""
-        if not any_order:
-            if calls not in self.mock_calls:
-                raise AssertionError(
-                    'Calls not found.\nExpected: %r\n'
-                    'Actual: %r' % (calls, self.mock_calls)
-                )
-            return
-
-        all_calls = list(self.mock_calls)
-
-        not_found = []
-        for kall in calls:
-            try:
-                all_calls.remove(kall)
-            except ValueError:
-                not_found.append(kall)
-        if not_found:
-            raise AssertionError(
-                '%r not all found in call list' % (tuple(not_found),)
-            )
-
-
-    def assert_any_call(self, *args, **kwargs):
-        """assert the mock has been called with the specified arguments.
-
-        The assert passes if the mock has *ever* been called, unlike
-        `assert_called_with` and `assert_called_once_with` that only pass if
-        the call is the most recent one."""
-        kall = call(*args, **kwargs)
-        if kall not in self.call_args_list:
-            expected_string = self._format_mock_call_signature(args, kwargs)
-            raise AssertionError(
-                '%s call not found' % expected_string
-            )
-
-
-    def _get_child_mock(self, **kw):
-        """Create the child mocks for attributes and return value.
-        By default child mocks will be the same type as the parent.
-        Subclasses of Mock may want to override this to customize the way
-        child mocks are made.
-
-        For non-callable mocks the callable variant will be used (rather than
-        any custom subclass)."""
-        _type = type(self)
-        if not issubclass(_type, CallableMixin):
-            if issubclass(_type, NonCallableMagicMock):
-                klass = MagicMock
-            elif issubclass(_type, NonCallableMock) :
-                klass = Mock
-        else:
-            klass = _type.__mro__[1]
-        return klass(**kw)
-
-
-
-def _try_iter(obj):
-    if obj is None:
-        return obj
-    if _is_exception(obj):
-        return obj
-    if _callable(obj):
-        return obj
-    try:
-        return iter(obj)
-    except TypeError:
-        # XXXX backwards compatibility
-        # but this will blow up on first call - so maybe we should fail early?
-        return obj
-
-
-
-class CallableMixin(Base):
-
-    def __init__(self, spec=None, side_effect=None, return_value=DEFAULT,
-                 wraps=None, name=None, spec_set=None, parent=None,
-                 _spec_state=None, _new_name='', _new_parent=None, **kwargs):
-        self.__dict__['_mock_return_value'] = return_value
-
-        _super(CallableMixin, self).__init__(
-            spec, wraps, name, spec_set, parent,
-            _spec_state, _new_name, _new_parent, **kwargs
-        )
-
-        self.side_effect = side_effect
-
-
-    def _mock_check_sig(self, *args, **kwargs):
-        # stub method that can be replaced with one with a specific signature
-        pass
-
-
-    def __call__(_mock_self, *args, **kwargs):
-        # can't use self in-case a function / method we are mocking uses self
-        # in the signature
-        _mock_self._mock_check_sig(*args, **kwargs)
-        return _mock_self._mock_call(*args, **kwargs)
-
-
-    def _mock_call(_mock_self, *args, **kwargs):
-        self = _mock_self
-        self.called = True
-        self.call_count += 1
-        self.call_args = _Call((args, kwargs), two=True)
-        self.call_args_list.append(_Call((args, kwargs), two=True))
-
-        _new_name = self._mock_new_name
-        _new_parent = self._mock_new_parent
-        self.mock_calls.append(_Call(('', args, kwargs)))
-
-        seen = set()
-        skip_next_dot = _new_name == '()'
-        do_method_calls = self._mock_parent is not None
-        name = self._mock_name
-        while _new_parent is not None:
-            this_mock_call = _Call((_new_name, args, kwargs))
-            if _new_parent._mock_new_name:
-                dot = '.'
-                if skip_next_dot:
-                    dot = ''
-
-                skip_next_dot = False
-                if _new_parent._mock_new_name == '()':
-                    skip_next_dot = True
-
-                _new_name = _new_parent._mock_new_name + dot + _new_name
-
-            if do_method_calls:
-                if _new_name == name:
-                    this_method_call = this_mock_call
-                else:
-                    this_method_call = _Call((name, args, kwargs))
-                _new_parent.method_calls.append(this_method_call)
-
-                do_method_calls = _new_parent._mock_parent is not None
-                if do_method_calls:
-                    name = _new_parent._mock_name + '.' + name
-
-            _new_parent.mock_calls.append(this_mock_call)
-            _new_parent = _new_parent._mock_new_parent
-
-            # use ids here so as not to call __hash__ on the mocks
-            _new_parent_id = id(_new_parent)
-            if _new_parent_id in seen:
-                break
-            seen.add(_new_parent_id)
-
-        ret_val = DEFAULT
-        effect = self.side_effect
-        if effect is not None:
-            if _is_exception(effect):
-                raise effect
-
-            if not _callable(effect):
-                result = next(effect)
-                if _is_exception(result):
-                    raise result
-                return result
-
-            ret_val = effect(*args, **kwargs)
-            if ret_val is DEFAULT:
-                ret_val = self.return_value
-
-        if (self._mock_wraps is not None and
-             self._mock_return_value is DEFAULT):
-            return self._mock_wraps(*args, **kwargs)
-        if ret_val is DEFAULT:
-            ret_val = self.return_value
-        return ret_val
-
-
-
-class Mock(CallableMixin, NonCallableMock):
-    """
-    Create a new `Mock` object. `Mock` takes several optional arguments
-    that specify the behaviour of the Mock object:
-
-    * `spec`: This can be either a list of strings or an existing object (a
-      class or instance) that acts as the specification for the mock object. If
-      you pass in an object then a list of strings is formed by calling dir on
-      the object (excluding unsupported magic attributes and methods). Accessing
-      any attribute not in this list will raise an `AttributeError`.
-
-      If `spec` is an object (rather than a list of strings) then
-      `mock.__class__` returns the class of the spec object. This allows mocks
-      to pass `isinstance` tests.
-
-    * `spec_set`: A stricter variant of `spec`. If used, attempting to *set*
-      or get an attribute on the mock that isn't on the object passed as
-      `spec_set` will raise an `AttributeError`.
-
-    * `side_effect`: A function to be called whenever the Mock is called. See
-      the `side_effect` attribute. Useful for raising exceptions or
-      dynamically changing return values. The function is called with the same
-      arguments as the mock, and unless it returns `DEFAULT`, the return
-      value of this function is used as the return value.
-
-      Alternatively `side_effect` can be an exception class or instance. In
-      this case the exception will be raised when the mock is called.
-
-      If `side_effect` is an iterable then each call to the mock will return
-      the next value from the iterable. If any of the members of the iterable
-      are exceptions they will be raised instead of returned.
-
-    * `return_value`: The value returned when the mock is called. By default
-      this is a new Mock (created on first access). See the
-      `return_value` attribute.
-
-    * `wraps`: Item for the mock object to wrap. If `wraps` is not None then
-      calling the Mock will pass the call through to the wrapped object
-      (returning the real result). Attribute access on the mock will return a
-      Mock object that wraps the corresponding attribute of the wrapped object
-      (so attempting to access an attribute that doesn't exist will raise an
-      `AttributeError`).
-
-      If the mock has an explicit `return_value` set then calls are not passed
-      to the wrapped object and the `return_value` is returned instead.
-
-    * `name`: If the mock has a name then it will be used in the repr of the
-      mock. This can be useful for debugging. The name is propagated to child
-      mocks.
-
-    Mocks can also be called with arbitrary keyword arguments. These will be
-    used to set attributes on the mock after it is created.
-    """
-
-
-
-def _dot_lookup(thing, comp, import_path):
-    try:
-        return getattr(thing, comp)
-    except AttributeError:
-        __import__(import_path)
-        return getattr(thing, comp)
-
-
-def _importer(target):
-    components = target.split('.')
-    import_path = components.pop(0)
-    thing = __import__(import_path)
-
-    for comp in components:
-        import_path += ".%s" % comp
-        thing = _dot_lookup(thing, comp, import_path)
-    return thing
-
-
-def _is_started(patcher):
-    # XXXX horrible
-    return hasattr(patcher, 'is_local')
-
-
-class _patch(object):
-
-    attribute_name = None
-    _active_patches = set()
-
-    def __init__(
-            self, getter, attribute, new, spec, create,
-            spec_set, autospec, new_callable, kwargs
-        ):
-        if new_callable is not None:
-            if new is not DEFAULT:
-                raise ValueError(
-                    "Cannot use 'new' and 'new_callable' together"
-                )
-            if autospec is not None:
-                raise ValueError(
-                    "Cannot use 'autospec' and 'new_callable' together"
-                )
-
-        self.getter = getter
-        self.attribute = attribute
-        self.new = new
-        self.new_callable = new_callable
-        self.spec = spec
-        self.create = create
-        self.has_local = False
-        self.spec_set = spec_set
-        self.autospec = autospec
-        self.kwargs = kwargs
-        self.additional_patchers = []
-
-
-    def copy(self):
-        patcher = _patch(
-            self.getter, self.attribute, self.new, self.spec,
-            self.create, self.spec_set,
-            self.autospec, self.new_callable, self.kwargs
-        )
-        patcher.attribute_name = self.attribute_name
-        patcher.additional_patchers = [
-            p.copy() for p in self.additional_patchers
-        ]
-        return patcher
-
-
-    def __call__(self, func):
-        if isinstance(func, ClassTypes):
-            return self.decorate_class(func)
-        return self.decorate_callable(func)
-
-
-    def decorate_class(self, klass):
-        for attr in dir(klass):
-            if not attr.startswith(patch.TEST_PREFIX):
-                continue
-
-            attr_value = getattr(klass, attr)
-            if not hasattr(attr_value, "__call__"):
-                continue
-
-            patcher = self.copy()
-            setattr(klass, attr, patcher(attr_value))
-        return klass
-
-
-    def decorate_callable(self, func):
-        if hasattr(func, 'patchings'):
-            func.patchings.append(self)
-            return func
-
-        @wraps(func)
-        def patched(*args, **keywargs):
-            # don't use a with here (backwards compatability with Python 2.4)
-            extra_args = []
-            entered_patchers = []
-
-            # can't use try...except...finally because of Python 2.4
-            # compatibility
-            exc_info = tuple()
-            try:
-                try:
-                    for patching in patched.patchings:
-                        arg = patching.__enter__()
-                        entered_patchers.append(patching)
-                        if patching.attribute_name is not None:
-                            keywargs.update(arg)
-                        elif patching.new is DEFAULT:
-                            extra_args.append(arg)
-
-                    args += tuple(extra_args)
-                    return func(*args, **keywargs)
-                except:
-                    if (patching not in entered_patchers and
-                        _is_started(patching)):
-                        # the patcher may have been started, but an exception
-                        # raised whilst entering one of its additional_patchers
-                        entered_patchers.append(patching)
-                    # Pass the exception to __exit__
-                    exc_info = sys.exc_info()
-                    # re-raise the exception
-                    raise
-            finally:
-                for patching in reversed(entered_patchers):
-                    patching.__exit__(*exc_info)
-
-        patched.patchings = [self]
-        if hasattr(func, 'func_code'):
-            # not in Python 3
-            patched.compat_co_firstlineno = getattr(
-                func, "compat_co_firstlineno",
-                func.func_code.co_firstlineno
-            )
-        return patched
-
-
-    def get_original(self):
-        target = self.getter()
-        name = self.attribute
-
-        original = DEFAULT
-        local = False
-
-        try:
-            original = target.__dict__[name]
-        except (AttributeError, KeyError):
-            original = getattr(target, name, DEFAULT)
-        else:
-            local = True
-
-        if not self.create and original is DEFAULT:
-            raise AttributeError(
-                "%s does not have the attribute %r" % (target, name)
-            )
-        return original, local
-
-
-    def __enter__(self):
-        """Perform the patch."""
-        new, spec, spec_set = self.new, self.spec, self.spec_set
-        autospec, kwargs = self.autospec, self.kwargs
-        new_callable = self.new_callable
-        self.target = self.getter()
-
-        # normalise False to None
-        if spec is False:
-            spec = None
-        if spec_set is False:
-            spec_set = None
-        if autospec is False:
-            autospec = None
-
-        if spec is not None and autospec is not None:
-            raise TypeError("Can't specify spec and autospec")
-        if ((spec is not None or autospec is not None) and
-            spec_set not in (True, None)):
-            raise TypeError("Can't provide explicit spec_set *and* spec or autospec")
-
-        original, local = self.get_original()
-
-        if new is DEFAULT and autospec is None:
-            inherit = False
-            if spec is True:
-                # set spec to the object we are replacing
-                spec = original
-                if spec_set is True:
-                    spec_set = original
-                    spec = None
-            elif spec is not None:
-                if spec_set is True:
-                    spec_set = spec
-                    spec = None
-            elif spec_set is True:
-                spec_set = original
-
-            if spec is not None or spec_set is not None:
-                if original is DEFAULT:
-                    raise TypeError("Can't use 'spec' with create=True")
-                if isinstance(original, ClassTypes):
-                    # If we're patching out a class and there is a spec
-                    inherit = True
-
-            Klass = MagicMock
-            _kwargs = {}
-            if new_callable is not None:
-                Klass = new_callable
-            elif spec is not None or spec_set is not None:
-                this_spec = spec
-                if spec_set is not None:
-                    this_spec = spec_set
-                if _is_list(this_spec):
-                    not_callable = '__call__' not in this_spec
-                else:
-                    not_callable = not _callable(this_spec)
-                if not_callable:
-                    Klass = NonCallableMagicMock
-
-            if spec is not None:
-                _kwargs['spec'] = spec
-            if spec_set is not None:
-                _kwargs['spec_set'] = spec_set
-
-            # add a name to mocks
-            if (isinstance(Klass, type) and
-                issubclass(Klass, NonCallableMock) and self.attribute):
-                _kwargs['name'] = self.attribute
-
-            _kwargs.update(kwargs)
-            new = Klass(**_kwargs)
-
-            if inherit and _is_instance_mock(new):
-                # we can only tell if the instance should be callable if the
-                # spec is not a list
-                this_spec = spec
-                if spec_set is not None:
-                    this_spec = spec_set
-                if (not _is_list(this_spec) and not
-                    _instance_callable(this_spec)):
-                    Klass = NonCallableMagicMock
-
-                _kwargs.pop('name')
-                new.return_value = Klass(_new_parent=new, _new_name='()',
-                                         **_kwargs)
-        elif autospec is not None:
-            # spec is ignored, new *must* be default, spec_set is treated
-            # as a boolean. Should we check spec is not None and that spec_set
-            # is a bool?
-            if new is not DEFAULT:
-                raise TypeError(
-                    "autospec creates the mock for you. Can't specify "
-                    "autospec and new."
-                )
-            if original is DEFAULT:
-                raise TypeError("Can't use 'autospec' with create=True")
-            spec_set = bool(spec_set)
-            if autospec is True:
-                autospec = original
-
-            new = create_autospec(autospec, spec_set=spec_set,
-                                  _name=self.attribute, **kwargs)
-        elif kwargs:
-            # can't set keyword args when we aren't creating the mock
-            # XXXX If new is a Mock we could call new.configure_mock(**kwargs)
-            raise TypeError("Can't pass kwargs to a mock we aren't creating")
-
-        new_attr = new
-
-        self.temp_original = original
-        self.is_local = local
-        setattr(self.target, self.attribute, new_attr)
-        if self.attribute_name is not None:
-            extra_args = {}
-            if self.new is DEFAULT:
-                extra_args[self.attribute_name] =  new
-            for patching in self.additional_patchers:
-                arg = patching.__enter__()
-                if patching.new is DEFAULT:
-                    extra_args.update(arg)
-            return extra_args
-
-        return new
-
-
-    def __exit__(self, *exc_info):
-        """Undo the patch."""
-        if not _is_started(self):
-            raise RuntimeError('stop called on unstarted patcher')
-
-        if self.is_local and self.temp_original is not DEFAULT:
-            setattr(self.target, self.attribute, self.temp_original)
-        else:
-            delattr(self.target, self.attribute)
-            if not self.create and not hasattr(self.target, self.attribute):
-                # needed for proxy objects like django settings
-                setattr(self.target, self.attribute, self.temp_original)
-
-        del self.temp_original
-        del self.is_local
-        del self.target
-        for patcher in reversed(self.additional_patchers):
-            if _is_started(patcher):
-                patcher.__exit__(*exc_info)
-
-
-    def start(self):
-        """Activate a patch, returning any created mock."""
-        result = self.__enter__()
-        self._active_patches.add(self)
-        return result
-
-
-    def stop(self):
-        """Stop an active patch."""
-        self._active_patches.discard(self)
-        return self.__exit__()
-
-
-
-def _get_target(target):
-    try:
-        target, attribute = target.rsplit('.', 1)
-    except (TypeError, ValueError):
-        raise TypeError("Need a valid target to patch. You supplied: %r" %
-                        (target,))
-    getter = lambda: _importer(target)
-    return getter, attribute
-
-
-def _patch_object(
-        target, attribute, new=DEFAULT, spec=None,
-        create=False, spec_set=None, autospec=None,
-        new_callable=None, **kwargs
-    ):
-    """
-    patch.object(target, attribute, new=DEFAULT, spec=None, create=False,
-                 spec_set=None, autospec=None, new_callable=None, **kwargs)
-
-    patch the named member (`attribute`) on an object (`target`) with a mock
-    object.
-
-    `patch.object` can be used as a decorator, class decorator or a context
-    manager. Arguments `new`, `spec`, `create`, `spec_set`,
-    `autospec` and `new_callable` have the same meaning as for `patch`. Like
-    `patch`, `patch.object` takes arbitrary keyword arguments for configuring
-    the mock object it creates.
-
-    When used as a class decorator `patch.object` honours `patch.TEST_PREFIX`
-    for choosing which methods to wrap.
-    """
-    getter = lambda: target
-    return _patch(
-        getter, attribute, new, spec, create,
-        spec_set, autospec, new_callable, kwargs
-    )
-
-
-def _patch_multiple(target, spec=None, create=False, spec_set=None,
-                    autospec=None, new_callable=None, **kwargs):
-    """Perform multiple patches in a single call. It takes the object to be
-    patched (either as an object or a string to fetch the object by importing)
-    and keyword arguments for the patches::
-
-        with patch.multiple(settings, FIRST_PATCH='one', SECOND_PATCH='two'):
-            ...
-
-    Use `DEFAULT` as the value if you want `patch.multiple` to create
-    mocks for you. In this case the created mocks are passed into a decorated
-    function by keyword, and a dictionary is returned when `patch.multiple` is
-    used as a context manager.
-
-    `patch.multiple` can be used as a decorator, class decorator or a context
-    manager. The arguments `spec`, `spec_set`, `create`,
-    `autospec` and `new_callable` have the same meaning as for `patch`. These
-    arguments will be applied to *all* patches done by `patch.multiple`.
-
-    When used as a class decorator `patch.multiple` honours `patch.TEST_PREFIX`
-    for choosing which methods to wrap.
-    """
-    if type(target) in (unicode, str):
-        getter = lambda: _importer(target)
-    else:
-        getter = lambda: target
-
-    if not kwargs:
-        raise ValueError(
-            'Must supply at least one keyword argument with patch.multiple'
-        )
-    # need to wrap in a list for python 3, where items is a view
-    items = list(kwargs.items())
-    attribute, new = items[0]
-    patcher = _patch(
-        getter, attribute, new, spec, create, spec_set,
-        autospec, new_callable, {}
-    )
-    patcher.attribute_name = attribute
-    for attribute, new in items[1:]:
-        this_patcher = _patch(
-            getter, attribute, new, spec, create, spec_set,
-            autospec, new_callable, {}
-        )
-        this_patcher.attribute_name = attribute
-        patcher.additional_patchers.append(this_patcher)
-    return patcher
-
-
-def patch(
-        target, new=DEFAULT, spec=None, create=False,
-        spec_set=None, autospec=None, new_callable=None, **kwargs
-    ):
-    """
-    `patch` acts as a function decorator, class decorator or a context
-    manager. Inside the body of the function or with statement, the `target`
-    is patched with a `new` object. When the function/with statement exits
-    the patch is undone.
-
-    If `new` is omitted, then the target is replaced with a
-    `MagicMock`. If `patch` is used as a decorator and `new` is
-    omitted, the created mock is passed in as an extra argument to the
-    decorated function. If `patch` is used as a context manager the created
-    mock is returned by the context manager.
-
-    `target` should be a string in the form `'package.module.ClassName'`. The
-    `target` is imported and the specified object replaced with the `new`
-    object, so the `target` must be importable from the environment you are
-    calling `patch` from. The target is imported when the decorated function
-    is executed, not at decoration time.
-
-    The `spec` and `spec_set` keyword arguments are passed to the `MagicMock`
-    if patch is creating one for you.
-
-    In addition you can pass `spec=True` or `spec_set=True`, which causes
-    patch to pass in the object being mocked as the spec/spec_set object.
-
-    `new_callable` allows you to specify a different class, or callable object,
-    that will be called to create the `new` object. By default `MagicMock` is
-    used.
-
-    A more powerful form of `spec` is `autospec`. If you set `autospec=True`
-    then the mock with be created with a spec from the object being replaced.
-    All attributes of the mock will also have the spec of the corresponding
-    attribute of the object being replaced. Methods and functions being
-    mocked will have their arguments checked and will raise a `TypeError` if
-    they are called with the wrong signature. For mocks replacing a class,
-    their return value (the 'instance') will have the same spec as the class.
-
-    Instead of `autospec=True` you can pass `autospec=some_object` to use an
-    arbitrary object as the spec instead of the one being replaced.
-
-    By default `patch` will fail to replace attributes that don't exist. If
-    you pass in `create=True`, and the attribute doesn't exist, patch will
-    create the attribute for you when the patched function is called, and
-    delete it again afterwards. This is useful for writing tests against
-    attributes that your production code creates at runtime. It is off by by
-    default because it can be dangerous. With it switched on you can write
-    passing tests against APIs that don't actually exist!
-
-    Patch can be used as a `TestCase` class decorator. It works by
-    decorating each test method in the class. This reduces the boilerplate
-    code when your test methods share a common patchings set. `patch` finds
-    tests by looking for method names that start with `patch.TEST_PREFIX`.
-    By default this is `test`, which matches the way `unittest` finds tests.
-    You can specify an alternative prefix by setting `patch.TEST_PREFIX`.
-
-    Patch can be used as a context manager, with the with statement. Here the
-    patching applies to the indented block after the with statement. If you
-    use "as" then the patched object will be bound to the name after the
-    "as"; very useful if `patch` is creating a mock object for you.
-
-    `patch` takes arbitrary keyword arguments. These will be passed to
-    the `Mock` (or `new_callable`) on construction.
-
-    `patch.dict(...)`, `patch.multiple(...)` and `patch.object(...)` are
-    available for alternate use-cases.
-    """
-    getter, attribute = _get_target(target)
-    return _patch(
-        getter, attribute, new, spec, create,
-        spec_set, autospec, new_callable, kwargs
-    )
-
-
-class _patch_dict(object):
-    """
-    Patch a dictionary, or dictionary like object, and restore the dictionary
-    to its original state after the test.
-
-    `in_dict` can be a dictionary or a mapping like container. If it is a
-    mapping then it must at least support getting, setting and deleting items
-    plus iterating over keys.
-
-    `in_dict` can also be a string specifying the name of the dictionary, which
-    will then be fetched by importing it.
-
-    `values` can be a dictionary of values to set in the dictionary. `values`
-    can also be an iterable of `(key, value)` pairs.
-
-    If `clear` is True then the dictionary will be cleared before the new
-    values are set.
-
-    `patch.dict` can also be called with arbitrary keyword arguments to set
-    values in the dictionary::
-
-        with patch.dict('sys.modules', mymodule=Mock(), other_module=Mock()):
-            ...
-
-    `patch.dict` can be used as a context manager, decorator or class
-    decorator. When used as a class decorator `patch.dict` honours
-    `patch.TEST_PREFIX` for choosing which methods to wrap.
-    """
-
-    def __init__(self, in_dict, values=(), clear=False, **kwargs):
-        if isinstance(in_dict, basestring):
-            in_dict = _importer(in_dict)
-        self.in_dict = in_dict
-        # support any argument supported by dict(...) constructor
-        self.values = dict(values)
-        self.values.update(kwargs)
-        self.clear = clear
-        self._original = None
-
-
-    def __call__(self, f):
-        if isinstance(f, ClassTypes):
-            return self.decorate_class(f)
-        @wraps(f)
-        def _inner(*args, **kw):
-            self._patch_dict()
-            try:
-                return f(*args, **kw)
-            finally:
-                self._unpatch_dict()
-
-        return _inner
-
-
-    def decorate_class(self, klass):
-        for attr in dir(klass):
-            attr_value = getattr(klass, attr)
-            if (attr.startswith(patch.TEST_PREFIX) and
-                 hasattr(attr_value, "__call__")):
-                decorator = _patch_dict(self.in_dict, self.values, self.clear)
-                decorated = decorator(attr_value)
-                setattr(klass, attr, decorated)
-        return klass
-
-
-    def __enter__(self):
-        """Patch the dict."""
-        self._patch_dict()
-
-
-    def _patch_dict(self):
-        values = self.values
-        in_dict = self.in_dict
-        clear = self.clear
-
-        try:
-            original = in_dict.copy()
-        except AttributeError:
-            # dict like object with no copy method
-            # must support iteration over keys
-            original = {}
-            for key in in_dict:
-                original[key] = in_dict[key]
-        self._original = original
-
-        if clear:
-            _clear_dict(in_dict)
-
-        try:
-            in_dict.update(values)
-        except AttributeError:
-            # dict like object with no update method
-            for key in values:
-                in_dict[key] = values[key]
-
-
-    def _unpatch_dict(self):
-        in_dict = self.in_dict
-        original = self._original
-
-        _clear_dict(in_dict)
-
-        try:
-            in_dict.update(original)
-        except AttributeError:
-            for key in original:
-                in_dict[key] = original[key]
-
-
-    def __exit__(self, *args):
-        """Unpatch the dict."""
-        self._unpatch_dict()
-        return False
-
-    start = __enter__
-    stop = __exit__
-
-
-def _clear_dict(in_dict):
-    try:
-        in_dict.clear()
-    except AttributeError:
-        keys = list(in_dict)
-        for key in keys:
-            del in_dict[key]
-
-
-def _patch_stopall():
-    """Stop all active patches."""
-    for patch in list(_patch._active_patches):
-        patch.stop()
-
-
-patch.object = _patch_object
-patch.dict = _patch_dict
-patch.multiple = _patch_multiple
-patch.stopall = _patch_stopall
-patch.TEST_PREFIX = 'test'
-
-magic_methods = (
-    "lt le gt ge eq ne "
-    "getitem setitem delitem "
-    "len contains iter "
-    "hash str sizeof "
-    "enter exit "
-    "divmod neg pos abs invert "
-    "complex int float index "
-    "trunc floor ceil "
-)
-
-numerics = "add sub mul div floordiv mod lshift rshift and xor or pow "
-inplace = ' '.join('i%s' % n for n in numerics.split())
-right = ' '.join('r%s' % n for n in numerics.split())
-extra = ''
-if inPy3k:
-    extra = 'bool next '
-else:
-    extra = 'unicode long nonzero oct hex truediv rtruediv '
-
-# not including __prepare__, __instancecheck__, __subclasscheck__
-# (as they are metaclass methods)
-# __del__ is not supported at all as it causes problems if it exists
-
-_non_defaults = set('__%s__' % method for method in [
-    'cmp', 'getslice', 'setslice', 'coerce', 'subclasses',
-    'format', 'get', 'set', 'delete', 'reversed',
-    'missing', 'reduce', 'reduce_ex', 'getinitargs',
-    'getnewargs', 'getstate', 'setstate', 'getformat',
-    'setformat', 'repr', 'dir'
-])
-
-
-def _get_method(name, func):
-    "Turns a callable object (like a mock) into a real function"
-    def method(self, *args, **kw):
-        return func(self, *args, **kw)
-    method.__name__ = name
-    return method
-
-
-_magics = set(
-    '__%s__' % method for method in
-    ' '.join([magic_methods, numerics, inplace, right, extra]).split()
-)
-
-_all_magics = _magics | _non_defaults
-
-_unsupported_magics = set([
-    '__getattr__', '__setattr__',
-    '__init__', '__new__', '__prepare__'
-    '__instancecheck__', '__subclasscheck__',
-    '__del__'
-])
-
-_calculate_return_value = {
-    '__hash__': lambda self: object.__hash__(self),
-    '__str__': lambda self: object.__str__(self),
-    '__sizeof__': lambda self: object.__sizeof__(self),
-    '__unicode__': lambda self: unicode(object.__str__(self)),
-}
-
-_return_values = {
-    '__lt__': NotImplemented,
-    '__gt__': NotImplemented,
-    '__le__': NotImplemented,
-    '__ge__': NotImplemented,
-    '__int__': 1,
-    '__contains__': False,
-    '__len__': 0,
-    '__exit__': False,
-    '__complex__': 1j,
-    '__float__': 1.0,
-    '__bool__': True,
-    '__nonzero__': True,
-    '__oct__': '1',
-    '__hex__': '0x1',
-    '__long__': long(1),
-    '__index__': 1,
-}
-
-
-def _get_eq(self):
-    def __eq__(other):
-        ret_val = self.__eq__._mock_return_value
-        if ret_val is not DEFAULT:
-            return ret_val
-        return self is other
-    return __eq__
-
-def _get_ne(self):
-    def __ne__(other):
-        if self.__ne__._mock_return_value is not DEFAULT:
-            return DEFAULT
-        return self is not other
-    return __ne__
-
-def _get_iter(self):
-    def __iter__():
-        ret_val = self.__iter__._mock_return_value
-        if ret_val is DEFAULT:
-            return iter([])
-        # if ret_val was already an iterator, then calling iter on it should
-        # return the iterator unchanged
-        return iter(ret_val)
-    return __iter__
-
-_side_effect_methods = {
-    '__eq__': _get_eq,
-    '__ne__': _get_ne,
-    '__iter__': _get_iter,
-}
-
-
-
-def _set_return_value(mock, method, name):
-    fixed = _return_values.get(name, DEFAULT)
-    if fixed is not DEFAULT:
-        method.return_value = fixed
-        return
-
-    return_calulator = _calculate_return_value.get(name)
-    if return_calulator is not None:
-        try:
-            return_value = return_calulator(mock)
-        except AttributeError:
-            # XXXX why do we return AttributeError here?
-            #      set it as a side_effect instead?
-            return_value = AttributeError(name)
-        method.return_value = return_value
-        return
-
-    side_effector = _side_effect_methods.get(name)
-    if side_effector is not None:
-        method.side_effect = side_effector(mock)
-
-
-
-class MagicMixin(object):
-    def __init__(self, *args, **kw):
-        _super(MagicMixin, self).__init__(*args, **kw)
-        self._mock_set_magics()
-
-
-    def _mock_set_magics(self):
-        these_magics = _magics
-
-        if self._mock_methods is not None:
-            these_magics = _magics.intersection(self._mock_methods)
-
-            remove_magics = set()
-            remove_magics = _magics - these_magics
-
-            for entry in remove_magics:
-                if entry in type(self).__dict__:
-                    # remove unneeded magic methods
-                    delattr(self, entry)
-
-        # don't overwrite existing attributes if called a second time
-        these_magics = these_magics - set(type(self).__dict__)
-
-        _type = type(self)
-        for entry in these_magics:
-            setattr(_type, entry, MagicProxy(entry, self))
-
-
-
-class NonCallableMagicMock(MagicMixin, NonCallableMock):
-    """A version of `MagicMock` that isn't callable."""
-    def mock_add_spec(self, spec, spec_set=False):
-        """Add a spec to a mock. `spec` can either be an object or a
-        list of strings. Only attributes on the `spec` can be fetched as
-        attributes from the mock.
-
-        If `spec_set` is True then only attributes on the spec can be set."""
-        self._mock_add_spec(spec, spec_set)
-        self._mock_set_magics()
-
-
-
-class MagicMock(MagicMixin, Mock):
-    """
-    MagicMock is a subclass of Mock with default implementations
-    of most of the magic methods. You can use MagicMock without having to
-    configure the magic methods yourself.
-
-    If you use the `spec` or `spec_set` arguments then *only* magic
-    methods that exist in the spec will be created.
-
-    Attributes and the return value of a `MagicMock` will also be `MagicMocks`.
-    """
-    def mock_add_spec(self, spec, spec_set=False):
-        """Add a spec to a mock. `spec` can either be an object or a
-        list of strings. Only attributes on the `spec` can be fetched as
-        attributes from the mock.
-
-        If `spec_set` is True then only attributes on the spec can be set."""
-        self._mock_add_spec(spec, spec_set)
-        self._mock_set_magics()
-
-
-
-class MagicProxy(object):
-    def __init__(self, name, parent):
-        self.name = name
-        self.parent = parent
-
-    def __call__(self, *args, **kwargs):
-        m = self.create_mock()
-        return m(*args, **kwargs)
-
-    def create_mock(self):
-        entry = self.name
-        parent = self.parent
-        m = parent._get_child_mock(name=entry, _new_name=entry,
-                                   _new_parent=parent)
-        setattr(parent, entry, m)
-        _set_return_value(parent, m, entry)
-        return m
-
-    def __get__(self, obj, _type=None):
-        return self.create_mock()
-
-
-
-class _ANY(object):
-    "A helper object that compares equal to everything."
-
-    def __eq__(self, other):
-        return True
-
-    def __ne__(self, other):
-        return False
-
-    def __repr__(self):
-        return '<ANY>'
-
-ANY = _ANY()
-
-
-
-def _format_call_signature(name, args, kwargs):
-    message = '%s(%%s)' % name
-    formatted_args = ''
-    args_string = ', '.join([repr(arg) for arg in args])
-    kwargs_string = ', '.join([
-        '%s=%r' % (key, value) for key, value in kwargs.items()
-    ])
-    if args_string:
-        formatted_args = args_string
-    if kwargs_string:
-        if formatted_args:
-            formatted_args += ', '
-        formatted_args += kwargs_string
-
-    return message % formatted_args
-
-
-
-class _Call(tuple):
-    """
-    A tuple for holding the results of a call to a mock, either in the form
-    `(args, kwargs)` or `(name, args, kwargs)`.
-
-    If args or kwargs are empty then a call tuple will compare equal to
-    a tuple without those values. This makes comparisons less verbose::
-
-        _Call(('name', (), {})) == ('name',)
-        _Call(('name', (1,), {})) == ('name', (1,))
-        _Call(((), {'a': 'b'})) == ({'a': 'b'},)
-
-    The `_Call` object provides a useful shortcut for comparing with call::
-
-        _Call(((1, 2), {'a': 3})) == call(1, 2, a=3)
-        _Call(('foo', (1, 2), {'a': 3})) == call.foo(1, 2, a=3)
-
-    If the _Call has no name then it will match any name.
-    """
-    def __new__(cls, value=(), name=None, parent=None, two=False,
-                from_kall=True):
-        name = ''
-        args = ()
-        kwargs = {}
-        _len = len(value)
-        if _len == 3:
-            name, args, kwargs = value
-        elif _len == 2:
-            first, second = value
-            if isinstance(first, basestring):
-                name = first
-                if isinstance(second, tuple):
-                    args = second
-                else:
-                    kwargs = second
-            else:
-                args, kwargs = first, second
-        elif _len == 1:
-            value, = value
-            if isinstance(value, basestring):
-                name = value
-            elif isinstance(value, tuple):
-                args = value
-            else:
-                kwargs = value
-
-        if two:
-            return tuple.__new__(cls, (args, kwargs))
-
-        return tuple.__new__(cls, (name, args, kwargs))
-
-
-    def __init__(self, value=(), name=None, parent=None, two=False,
-                 from_kall=True):
-        self.name = name
-        self.parent = parent
-        self.from_kall = from_kall
-
-
-    def __eq__(self, other):
-        if other is ANY:
-            return True
-        try:
-            len_other = len(other)
-        except TypeError:
-            return False
-
-        self_name = ''
-        if len(self) == 2:
-            self_args, self_kwargs = self
-        else:
-            self_name, self_args, self_kwargs = self
-
-        other_name = ''
-        if len_other == 0:
-            other_args, other_kwargs = (), {}
-        elif len_other == 3:
-            other_name, other_args, other_kwargs = other
-        elif len_other == 1:
-            value, = other
-            if isinstance(value, tuple):
-                other_args = value
-                other_kwargs = {}
-            elif isinstance(value, basestring):
-                other_name = value
-                other_args, other_kwargs = (), {}
-            else:
-                other_args = ()
-                other_kwargs = value
-        else:
-            # len 2
-            # could be (name, args) or (name, kwargs) or (args, kwargs)
-            first, second = other
-            if isinstance(first, basestring):
-                other_name = first
-                if isinstance(second, tuple):
-                    other_args, other_kwargs = second, {}
-                else:
-                    other_args, other_kwargs = (), second
-            else:
-                other_args, other_kwargs = first, second
-
-        if self_name and other_name != self_name:
-            return False
-
-        # this order is important for ANY to work!
-        return (other_args, other_kwargs) == (self_args, self_kwargs)
-
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-
-    def __call__(self, *args, **kwargs):
-        if self.name is None:
-            return _Call(('', args, kwargs), name='()')
-
-        name = self.name + '()'
-        return _Call((self.name, args, kwargs), name=name, parent=self)
-
-
-    def __getattr__(self, attr):
-        if self.name is None:
-            return _Call(name=attr, from_kall=False)
-        name = '%s.%s' % (self.name, attr)
-        return _Call(name=name, parent=self, from_kall=False)
-
-
-    def __repr__(self):
-        if not self.from_kall:
-            name = self.name or 'call'
-            if name.startswith('()'):
-                name = 'call%s' % name
-            return name
-
-        if len(self) == 2:
-            name = 'call'
-            args, kwargs = self
-        else:
-            name, args, kwargs = self
-            if not name:
-                name = 'call'
-            elif not name.startswith('()'):
-                name = 'call.%s' % name
-            else:
-                name = 'call%s' % name
-        return _format_call_signature(name, args, kwargs)
-
-
-    def call_list(self):
-        """For a call object that represents multiple calls, `call_list`
-        returns a list of all the intermediate calls as well as the
-        final call."""
-        vals = []
-        thing = self
-        while thing is not None:
-            if thing.from_kall:
-                vals.append(thing)
-            thing = thing.parent
-        return _CallList(reversed(vals))
-
-
-call = _Call(from_kall=False)
-
-
-
-def create_autospec(spec, spec_set=False, instance=False, _parent=None,
-                    _name=None, **kwargs):
-    """Create a mock object using another object as a spec. Attributes on the
-    mock will use the corresponding attribute on the `spec` object as their
-    spec.
-
-    Functions or methods being mocked will have their arguments checked
-    to check that they are called with the correct signature.
-
-    If `spec_set` is True then attempting to set attributes that don't exist
-    on the spec object will raise an `AttributeError`.
-
-    If a class is used as a spec then the return value of the mock (the
-    instance of the class) will have the same spec. You can use a class as the
-    spec for an instance object by passing `instance=True`. The returned mock
-    will only be callable if instances of the mock are callable.
-
-    `create_autospec` also takes arbitrary keyword arguments that are passed to
-    the constructor of the created mock."""
-    if _is_list(spec):
-        # can't pass a list instance to the mock constructor as it will be
-        # interpreted as a list of strings
-        spec = type(spec)
-
-    is_type = isinstance(spec, ClassTypes)
-
-    _kwargs = {'spec': spec}
-    if spec_set:
-        _kwargs = {'spec_set': spec}
-    elif spec is None:
-        # None we mock with a normal mock without a spec
-        _kwargs = {}
-
-    _kwargs.update(kwargs)
-
-    Klass = MagicMock
-    if type(spec) in DescriptorTypes:
-        # descriptors don't have a spec
-        # because we don't know what type they return
-        _kwargs = {}
-    elif not _callable(spec):
-        Klass = NonCallableMagicMock
-    elif is_type and instance and not _instance_callable(spec):
-        Klass = NonCallableMagicMock
-
-    _new_name = _name
-    if _parent is None:
-        # for a top level object no _new_name should be set
-        _new_name = ''
-
-    mock = Klass(parent=_parent, _new_parent=_parent, _new_name=_new_name,
-                 name=_name, **_kwargs)
-
-    if isinstance(spec, FunctionTypes):
-        # should only happen at the top level because we don't
-        # recurse for functions
-        mock = _set_signature(mock, spec)
-    else:
-        _check_signature(spec, mock, is_type, instance)
-
-    if _parent is not None and not instance:
-        _parent._mock_children[_name] = mock
-
-    if is_type and not instance and 'return_value' not in kwargs:
-        mock.return_value = create_autospec(spec, spec_set, instance=True,
-                                            _name='()', _parent=mock)
-
-    for entry in dir(spec):
-        if _is_magic(entry):
-            # MagicMock already does the useful magic methods for us
-            continue
-
-        if isinstance(spec, FunctionTypes) and entry in FunctionAttributes:
-            # allow a mock to actually be a function
-            continue
-
-        # XXXX do we need a better way of getting attributes without
-        # triggering code execution (?) Probably not - we need the actual
-        # object to mock it so we would rather trigger a property than mock
-        # the property descriptor. Likewise we want to mock out dynamically
-        # provided attributes.
-        # XXXX what about attributes that raise exceptions other than
-        # AttributeError on being fetched?
-        # we could be resilient against it, or catch and propagate the
-        # exception when the attribute is fetched from the mock
-        try:
-            original = getattr(spec, entry)
-        except AttributeError:
-            continue
-
-        kwargs = {'spec': original}
-        if spec_set:
-            kwargs = {'spec_set': original}
-
-        if not isinstance(original, FunctionTypes):
-            new = _SpecState(original, spec_set, mock, entry, instance)
-            mock._mock_children[entry] = new
-        else:
-            parent = mock
-            if isinstance(spec, FunctionTypes):
-                parent = mock.mock
-
-            new = MagicMock(parent=parent, name=entry, _new_name=entry,
-                            _new_parent=parent, **kwargs)
-            mock._mock_children[entry] = new
-            skipfirst = _must_skip(spec, entry, is_type)
-            _check_signature(original, new, skipfirst=skipfirst)
-
-        # so functions created with _set_signature become instance attributes,
-        # *plus* their underlying mock exists in _mock_children of the parent
-        # mock. Adding to _mock_children may be unnecessary where we are also
-        # setting as an instance attribute?
-        if isinstance(new, FunctionTypes):
-            setattr(mock, entry, new)
-
-    return mock
-
-
-def _must_skip(spec, entry, is_type):
-    if not isinstance(spec, ClassTypes):
-        if entry in getattr(spec, '__dict__', {}):
-            # instance attribute - shouldn't skip
-            return False
-        spec = spec.__class__
-    if not hasattr(spec, '__mro__'):
-        # old style class: can't have descriptors anyway
-        return is_type
-
-    for klass in spec.__mro__:
-        result = klass.__dict__.get(entry, DEFAULT)
-        if result is DEFAULT:
-            continue
-        if isinstance(result, (staticmethod, classmethod)):
-            return False
-        return is_type
-
-    # shouldn't get here unless function is a dynamically provided attribute
-    # XXXX untested behaviour
-    return is_type
-
-
-def _get_class(obj):
-    try:
-        return obj.__class__
-    except AttributeError:
-        # in Python 2, _sre.SRE_Pattern objects have no __class__
-        return type(obj)
-
-
-class _SpecState(object):
-
-    def __init__(self, spec, spec_set=False, parent=None,
-                 name=None, ids=None, instance=False):
-        self.spec = spec
-        self.ids = ids
-        self.spec_set = spec_set
-        self.parent = parent
-        self.instance = instance
-        self.name = name
-
-
-FunctionTypes = (
-    # python function
-    type(create_autospec),
-    # instance method
-    type(ANY.__eq__),
-    # unbound method
-    type(_ANY.__eq__),
-)
-
-FunctionAttributes = set([
-    'func_closure',
-    'func_code',
-    'func_defaults',
-    'func_dict',
-    'func_doc',
-    'func_globals',
-    'func_name',
-])
-
-
-file_spec = None
-
-
-def mock_open(mock=None, read_data=''):
-    """
-    A helper function to create a mock to replace the use of `open`. It works
-    for `open` called directly or used as a context manager.
-
-    The `mock` argument is the mock object to configure. If `None` (the
-    default) then a `MagicMock` will be created for you, with the API limited
-    to methods or attributes available on standard file handles.
-
-    `read_data` is a string for the `read` method of the file handle to return.
-    This is an empty string by default.
-    """
-    global file_spec
-    if file_spec is None:
-        # set on first use
-        if inPy3k:
-            import _io
-            file_spec = list(set(dir(_io.TextIOWrapper)).union(set(dir(_io.BytesIO))))
-        else:
-            file_spec = file
-
-    if mock is None:
-        mock = MagicMock(name='open', spec=open)
-
-    handle = MagicMock(spec=file_spec)
-    handle.write.return_value = None
-    handle.__enter__.return_value = handle
-    handle.read.return_value = read_data
-
-    mock.return_value = handle
-    return mock
-
-
-class PropertyMock(Mock):
-    """
-    A mock intended to be used as a property, or other descriptor, on a class.
-    `PropertyMock` provides `__get__` and `__set__` methods so you can specify
-    a return value when it is fetched.
-
-    Fetching a `PropertyMock` instance from an object calls the mock, with
-    no args. Setting it calls the mock with the value being set.
-    """
-    def _get_child_mock(self, **kwargs):
-        return MagicMock(**kwargs)
-
-    def __get__(self, obj, obj_type):
-        return self()
-    def __set__(self, obj, val):
-        self(val)