| # mock.py |
| # Test tools for mocking and patching. |
| # Maintained by Michael Foord |
| # Backport for other versions of Python available from |
| # https://pypi.org/project/mock |
| |
| __all__ = ( |
| 'Mock', |
| 'MagicMock', |
| 'patch', |
| 'sentinel', |
| 'DEFAULT', |
| 'ANY', |
| 'call', |
| 'create_autospec', |
| 'FILTER_DIR', |
| 'NonCallableMock', |
| 'NonCallableMagicMock', |
| 'mock_open', |
| 'PropertyMock', |
| 'seal', |
| ) |
| |
| |
| __version__ = '1.0' |
| |
| |
| import inspect |
| import pprint |
| import sys |
| import builtins |
| from types import ModuleType |
| from functools import wraps, partial |
| |
| |
| _builtins = {name for name in dir(builtins) if not name.startswith('_')} |
| |
| BaseExceptions = (BaseException,) |
| if 'java' in sys.platform: |
| # jython |
| import java |
| BaseExceptions = (BaseException, java.lang.Throwable) |
| |
| |
| FILTER_DIR = True |
| |
| # Workaround for issue #12370 |
| # Without this, the __class__ properties wouldn't be set correctly |
| _safe_super = super |
| |
| 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, type) and issubclass(obj, BaseExceptions) |
| ) |
| |
| |
| def _get_signature_object(func, as_instance, eat_self): |
| """ |
| Given an arbitrary, possibly callable object, try to create a suitable |
| signature object. |
| Return a (reduced func, signature) tuple, or None. |
| """ |
| if isinstance(func, type) and not as_instance: |
| # If it's a type and should be modelled as a type, use __init__. |
| try: |
| func = func.__init__ |
| except AttributeError: |
| return None |
| # Skip the `self` argument in __init__ |
| eat_self = True |
| elif not isinstance(func, FunctionTypes): |
| # If we really want to model an instance of the passed type, |
| # __call__ should be looked up, not __init__. |
| try: |
| func = func.__call__ |
| except AttributeError: |
| return None |
| if eat_self: |
| sig_func = partial(func, None) |
| else: |
| sig_func = func |
| try: |
| return func, inspect.signature(sig_func) |
| except ValueError: |
| # Certain callable types are not supported by inspect.signature() |
| return None |
| |
| |
| def _check_signature(func, mock, skipfirst, instance=False): |
| sig = _get_signature_object(func, instance, skipfirst) |
| if sig is None: |
| return |
| func, sig = sig |
| def checksig(_mock_self, *args, **kwargs): |
| sig.bind(*args, **kwargs) |
| _copy_func_details(func, checksig) |
| type(mock)._mock_check_sig = checksig |
| |
| |
| def _copy_func_details(func, funcopy): |
| # we explicitly don't copy func.__dict__ into this copy as it would |
| # expose original attributes that should be mocked |
| for attribute in ( |
| '__name__', '__doc__', '__text_signature__', |
| '__module__', '__defaults__', '__kwdefaults__', |
| ): |
| try: |
| setattr(funcopy, attribute, getattr(func, attribute)) |
| except AttributeError: |
| pass |
| |
| |
| def _callable(obj): |
| if isinstance(obj, type): |
| 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, type): |
| # already an instance |
| return getattr(obj, '__call__', None) is not None |
| |
| # *could* be broken by a class overriding __mro__ or __dict__ via |
| # a metaclass |
| for base in (obj,) + obj.__mro__: |
| if base.__dict__.get('__call__') is not None: |
| 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, type) |
| result = _get_signature_object(original, instance, skipfirst) |
| if result is None: |
| return mock |
| func, sig = result |
| def checksig(*args, **kwargs): |
| sig.bind(*args, **kwargs) |
| _copy_func_details(func, checksig) |
| |
| name = original.__name__ |
| if not name.isidentifier(): |
| 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(*args, **kwargs): |
| return mock.assert_called(*args, **kwargs) |
| def assert_not_called(*args, **kwargs): |
| return mock.assert_not_called(*args, **kwargs) |
| def assert_called_once(*args, **kwargs): |
| return mock.assert_called_once(*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 |
| funcopy.assert_called = assert_called |
| funcopy.assert_not_called = assert_not_called |
| funcopy.assert_called_once = assert_called_once |
| |
| 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 |
| |
| def __reduce__(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(unittest.mock) raises an exception |
| raise AttributeError |
| return self._sentinels.setdefault(name, _SentinelObject(name)) |
| |
| def __reduce__(self): |
| return 'sentinel' |
| |
| |
| sentinel = _Sentinel() |
| |
| DEFAULT = sentinel.DEFAULT |
| _missing = sentinel.MISSING |
| _deleted = sentinel.DELETED |
| |
| |
| def _copy(value): |
| if type(value) in (dict, list, tuple, set): |
| return type(value)(value) |
| return value |
| |
| |
| _allowed_names = { |
| '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 |
| |
| # Internal class to identify if we wrapped an iterator object or not. |
| class _MockIter(object): |
| def __init__(self, obj): |
| self.obj = iter(obj) |
| def __iter__(self): |
| return self |
| def __next__(self): |
| return next(self.obj) |
| |
| 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, |
| _spec_as_instance=False, _eat_self=None, unsafe=False, **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 |
| __dict__['_mock_sealed'] = False |
| |
| if spec_set is not None: |
| spec = spec_set |
| spec_set = True |
| if _eat_self is None: |
| _eat_self = parent is not None |
| |
| self._mock_add_spec(spec, spec_set, _spec_as_instance, _eat_self) |
| |
| __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() |
| __dict__['_mock_unsafe'] = unsafe |
| |
| if kwargs: |
| self.configure_mock(**kwargs) |
| |
| _safe_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_as_instance=False, |
| _eat_self=False): |
| _spec_class = None |
| _spec_signature = None |
| |
| if spec is not None and not _is_list(spec): |
| if isinstance(spec, type): |
| _spec_class = spec |
| else: |
| _spec_class = _get_class(spec) |
| res = _get_signature_object(spec, |
| _spec_as_instance, _eat_self) |
| _spec_signature = res and res[1] |
| |
| spec = dir(spec) |
| |
| __dict__ = self.__dict__ |
| __dict__['_spec_class'] = _spec_class |
| __dict__['_spec_set'] = spec_set |
| __dict__['_spec_signature'] = _spec_signature |
| __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): |
| delegated = self._mock_delegate |
| if delegated is None: |
| return self._mock_side_effect |
| sf = delegated.side_effect |
| if (sf is not None and not callable(sf) |
| and not isinstance(sf, _MockIter) and not _is_exception(sf)): |
| sf = _MockIter(sf) |
| delegated.side_effect = sf |
| return sf |
| |
| def __set_side_effect(self, value): |
| value = _try_iter(value) |
| delegated = self._mock_delegate |
| if delegated is None: |
| self._mock_side_effect = value |
| else: |
| delegated.side_effect = value |
| |
| side_effect = property(__get_side_effect, __set_side_effect) |
| |
| |
| def reset_mock(self, visited=None,*, return_value=False, side_effect=False): |
| "Restore the mock object to its initial state." |
| if visited is None: |
| visited = [] |
| if id(self) in visited: |
| return |
| visited.append(id(self)) |
| |
| self.called = False |
| self.call_args = None |
| self.call_count = 0 |
| self.mock_calls = _CallList() |
| self.call_args_list = _CallList() |
| self.method_calls = _CallList() |
| |
| if return_value: |
| self._mock_return_value = DEFAULT |
| if side_effect: |
| self._mock_side_effect = None |
| |
| for child in self._mock_children.values(): |
| if isinstance(child, _SpecState): |
| continue |
| child.reset_mock(visited) |
| |
| ret = self._mock_return_value |
| if _is_instance_mock(ret) and ret is not self: |
| ret.reset_mock(visited) |
| |
| |
| 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 in {'_mock_methods', '_mock_unsafe'}: |
| 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) |
| if not self._mock_unsafe: |
| if name.startswith(('assert', 'assret')): |
| 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 _extract_mock_name(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 |
| return ''.join(_name_list) |
| |
| def __repr__(self): |
| name = self._extract_mock_name() |
| |
| 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.""" |
| if not FILTER_DIR: |
| return object.__dir__(self) |
| |
| extras = self._mock_methods or [] |
| from_type = dir(type(self)) |
| from_dict = list(self.__dict__) |
| |
| 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 |
| |
| if self._mock_sealed and not hasattr(self, name): |
| mock_name = f'{self._extract_mock_name()}.{name}' |
| raise AttributeError(f'Cannot set {mock_name}') |
| |
| 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 _call_matcher(self, _call): |
| """ |
| Given a call (or simply an (args, kwargs) tuple), return a |
| comparison key suitable for matching with other calls. |
| This is a best effort method which relies on the spec's signature, |
| if available, or falls back on the arguments themselves. |
| """ |
| sig = self._spec_signature |
| if sig is not None: |
| if len(_call) == 2: |
| name = '' |
| args, kwargs = _call |
| else: |
| name, args, kwargs = _call |
| try: |
| return name, sig.bind(*args, **kwargs) |
| except TypeError as e: |
| return e.with_traceback(None) |
| else: |
| return _call |
| |
| def assert_not_called(_mock_self): |
| """assert that the mock was never called. |
| """ |
| self = _mock_self |
| if self.call_count != 0: |
| msg = ("Expected '%s' to not have been called. Called %s times." % |
| (self._mock_name or 'mock', self.call_count)) |
| raise AssertionError(msg) |
| |
| def assert_called(_mock_self): |
| """assert that the mock was called at least once |
| """ |
| self = _mock_self |
| if self.call_count == 0: |
| msg = ("Expected '%s' to have been called." % |
| self._mock_name or 'mock') |
| raise AssertionError(msg) |
| |
| def assert_called_once(_mock_self): |
| """assert that the mock was called only once. |
| """ |
| self = _mock_self |
| if not self.call_count == 1: |
| msg = ("Expected '%s' to have been called once. Called %s times." % |
| (self._mock_name or 'mock', self.call_count)) |
| raise AssertionError(msg) |
| |
| 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,)) |
| |
| def _error_message(): |
| msg = self._format_mock_failure_message(args, kwargs) |
| return msg |
| expected = self._call_matcher((args, kwargs)) |
| actual = self._call_matcher(self.call_args) |
| if expected != actual: |
| cause = expected if isinstance(expected, Exception) else None |
| raise AssertionError(_error_message()) from cause |
| |
| |
| def assert_called_once_with(_mock_self, *args, **kwargs): |
| """assert that the mock was called exactly once and that that call was |
| with the specified arguments.""" |
| self = _mock_self |
| if not self.call_count == 1: |
| msg = ("Expected '%s' to be called once. Called %s times." % |
| (self._mock_name or 'mock', 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`.""" |
| expected = [self._call_matcher(c) for c in calls] |
| cause = expected if isinstance(expected, Exception) else None |
| all_calls = _CallList(self._call_matcher(c) for c in self.mock_calls) |
| if not any_order: |
| if expected not in all_calls: |
| raise AssertionError( |
| 'Calls not found.\nExpected: %r\n' |
| 'Actual: %r' % (_CallList(calls), self.mock_calls) |
| ) from cause |
| return |
| |
| all_calls = list(all_calls) |
| |
| not_found = [] |
| for kall in expected: |
| 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),) |
| ) from cause |
| |
| |
| 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.""" |
| expected = self._call_matcher((args, kwargs)) |
| actual = [self._call_matcher(c) for c in self.call_args_list] |
| if expected not in actual: |
| cause = expected if isinstance(expected, Exception) else None |
| expected_string = self._format_mock_call_signature(args, kwargs) |
| raise AssertionError( |
| '%s call not found' % expected_string |
| ) from cause |
| |
| |
| 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] |
| |
| if self._mock_sealed: |
| attribute = "." + kw["name"] if "name" in kw else "()" |
| mock_name = self._extract_mock_name() + attribute |
| raise AttributeError(mock_name) |
| |
| 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 |
| |
| _safe_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 |
| _new_name = self._mock_new_name |
| _new_parent = self._mock_new_parent |
| |
| _call = _Call((args, kwargs), two=True) |
| self.call_args = _call |
| self.call_args_list.append(_call) |
| 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 |
| if result is DEFAULT: |
| result = self.return_value |
| return result |
| |
| ret_val = effect(*args, **kwargs) |
| |
| 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. |
| |
| 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 = [] |
| |
| 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, type): |
| 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): |
| extra_args = [] |
| entered_patchers = [] |
| |
| exc_info = tuple() |
| 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] |
| 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 name in _builtins and isinstance(target, ModuleType): |
| self.create = 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, type): |
| # 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) or |
| self.attribute in ('__doc__', '__module__', |
| '__defaults__', '__annotations__', |
| '__kwdefaults__')): |
| # 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.append(self) |
| return result |
| |
| |
| def stop(self): |
| """Stop an active patch.""" |
| try: |
| self._active_patches.remove(self) |
| except ValueError: |
| # If the patch hasn't been started this will fail |
| pass |
| |
| 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 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) is 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 will 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 |
| 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, str): |
| 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, type): |
| 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. LIFO to unroll nested patches.""" |
| for patch in reversed(_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 " |
| # we added divmod and rdivmod here instead of numerics |
| # because there is no idivmod |
| "divmod rdivmod neg pos abs invert " |
| "complex int float index " |
| "trunc floor ceil " |
| "bool next " |
| ) |
| |
| numerics = ( |
| "add sub mul matmul div floordiv mod lshift rshift and xor or pow truediv" |
| ) |
| inplace = ' '.join('i%s' % n for n in numerics.split()) |
| right = ' '.join('r%s' % n for n in numerics.split()) |
| |
| # 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 = { |
| '__get__', '__set__', '__delete__', '__reversed__', '__missing__', |
| '__reduce__', '__reduce_ex__', '__getinitargs__', '__getnewargs__', |
| '__getstate__', '__setstate__', '__getformat__', '__setformat__', |
| '__repr__', '__dir__', '__subclasses__', '__format__', |
| '__getnewargs_ex__', |
| } |
| |
| |
| 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 = { |
| '__%s__' % method for method in |
| ' '.join([magic_methods, numerics, inplace, right]).split() |
| } |
| |
| _all_magics = _magics | _non_defaults |
| |
| _unsupported_magics = { |
| '__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), |
| } |
| |
| _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, |
| '__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 |
| if self is other: |
| return True |
| return NotImplemented |
| return __eq__ |
| |
| def _get_ne(self): |
| def __ne__(other): |
| if self.__ne__._mock_return_value is not DEFAULT: |
| return DEFAULT |
| if self is other: |
| return False |
| return NotImplemented |
| 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): |
| self._mock_set_magics() # make magic work for kwargs in init |
| _safe_super(MagicMixin, self).__init__(*args, **kw) |
| self._mock_set_magics() # fix magic broken by upper level init |
| |
| |
| def _mock_set_magics(self): |
| these_magics = _magics |
| |
| if getattr(self, "_mock_methods", None) 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 sorted(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='', parent=None, two=False, |
| from_kall=True): |
| args = () |
| kwargs = {} |
| _len = len(value) |
| if _len == 3: |
| name, args, kwargs = value |
| elif _len == 2: |
| first, second = value |
| if isinstance(first, str): |
| name = first |
| if isinstance(second, tuple): |
| args = second |
| else: |
| kwargs = second |
| else: |
| args, kwargs = first, second |
| elif _len == 1: |
| value, = value |
| if isinstance(value, str): |
| 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, str): |
| other_name = value |
| other_args, other_kwargs = (), {} |
| else: |
| other_args = () |
| other_kwargs = value |
| elif len_other == 2: |
| # could be (name, args) or (name, kwargs) or (args, kwargs) |
| first, second = other |
| if isinstance(first, str): |
| 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 |
| else: |
| return False |
| |
| 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) |
| |
| |
| __ne__ = object.__ne__ |
| |
| |
| 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 count(self, *args, **kwargs): |
| return self.__getattr__('count')(*args, **kwargs) |
| |
| def index(self, *args, **kwargs): |
| return self.__getattr__('index')(*args, **kwargs) |
| |
| 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, type) |
| |
| _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 = {} |
| if _kwargs and instance: |
| _kwargs['_spec_as_instance'] = True |
| |
| _kwargs.update(kwargs) |
| |
| Klass = MagicMock |
| if inspect.isdatadescriptor(spec): |
| # 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 |
| |
| _name = _kwargs.pop('name', _name) |
| |
| _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 |
| |
| # 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 |
| |
| skipfirst = _must_skip(spec, entry, is_type) |
| kwargs['_eat_self'] = skipfirst |
| new = MagicMock(parent=parent, name=entry, _new_name=entry, |
| _new_parent=parent, |
| **kwargs) |
| mock._mock_children[entry] = new |
| _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): |
| """ |
| Return whether we should skip the first argument on spec's `entry` |
| attribute. |
| """ |
| if not isinstance(spec, type): |
| if entry in getattr(spec, '__dict__', {}): |
| # instance attribute - shouldn't skip |
| return False |
| spec = spec.__class__ |
| |
| for klass in spec.__mro__: |
| result = klass.__dict__.get(entry, DEFAULT) |
| if result is DEFAULT: |
| continue |
| if isinstance(result, (staticmethod, classmethod)): |
| return False |
| elif isinstance(getattr(result, '__get__', None), MethodWrapperTypes): |
| # Normal method => skip if looked up on type |
| # (if looked up on instance, self is already skipped) |
| return is_type |
| else: |
| return False |
| |
| # 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: |
| # it is possible for objects to 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__), |
| ) |
| |
| MethodWrapperTypes = ( |
| type(ANY.__eq__.__get__), |
| ) |
| |
| |
| file_spec = None |
| |
| def _iterate_read_data(read_data): |
| # Helper for mock_open: |
| # Retrieve lines from read_data via a generator so that separate calls to |
| # readline, read, and readlines are properly interleaved |
| sep = b'\n' if isinstance(read_data, bytes) else '\n' |
| data_as_list = [l + sep for l in read_data.split(sep)] |
| |
| if data_as_list[-1] == sep: |
| # If the last line ended in a newline, the list comprehension will have an |
| # extra entry that's just a newline. Remove this. |
| data_as_list = data_as_list[:-1] |
| else: |
| # If there wasn't an extra newline by itself, then the file being |
| # emulated doesn't have a newline to end the last line remove the |
| # newline that our naive format() added |
| data_as_list[-1] = data_as_list[-1][:-1] |
| |
| for line in data_as_list: |
| yield line |
| |
| |
| 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` methoddline`, and `readlines` of the |
| file handle to return. This is an empty string by default. |
| """ |
| def _readlines_side_effect(*args, **kwargs): |
| if handle.readlines.return_value is not None: |
| return handle.readlines.return_value |
| return list(_state[0]) |
| |
| def _read_side_effect(*args, **kwargs): |
| if handle.read.return_value is not None: |
| return handle.read.return_value |
| return type(read_data)().join(_state[0]) |
| |
| def _readline_side_effect(): |
| yield from _iter_side_effect() |
| while True: |
| yield type(read_data)() |
| |
| def _iter_side_effect(): |
| if handle.readline.return_value is not None: |
| while True: |
| yield handle.readline.return_value |
| for line in _state[0]: |
| yield line |
| |
| global file_spec |
| if file_spec is None: |
| import _io |
| file_spec = list(set(dir(_io.TextIOWrapper)).union(set(dir(_io.BytesIO)))) |
| |
| if mock is None: |
| mock = MagicMock(name='open', spec=open) |
| |
| handle = MagicMock(spec=file_spec) |
| handle.__enter__.return_value = handle |
| |
| _state = [_iterate_read_data(read_data), None] |
| |
| handle.write.return_value = None |
| handle.read.return_value = None |
| handle.readline.return_value = None |
| handle.readlines.return_value = None |
| |
| handle.read.side_effect = _read_side_effect |
| _state[1] = _readline_side_effect() |
| handle.readline.side_effect = _state[1] |
| handle.readlines.side_effect = _readlines_side_effect |
| handle.__iter__.side_effect = _iter_side_effect |
| |
| def reset_data(*args, **kwargs): |
| _state[0] = _iterate_read_data(read_data) |
| if handle.readline.side_effect == _state[1]: |
| # Only reset the side effect if the user hasn't overridden it. |
| _state[1] = _readline_side_effect() |
| handle.readline.side_effect = _state[1] |
| return DEFAULT |
| |
| mock.side_effect = reset_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) |
| |
| |
| def seal(mock): |
| """Disable the automatic generation of "submocks" |
| |
| Given an input Mock, seals it to ensure no further mocks will be generated |
| when accessing an attribute that was not already defined. |
| |
| Submocks are defined as all mocks which were created DIRECTLY from the |
| parent. If a mock is assigned to an attribute of an existing mock, |
| it is not considered a submock. |
| |
| """ |
| mock._mock_sealed = True |
| for attr in dir(mock): |
| try: |
| m = getattr(mock, attr) |
| except AttributeError: |
| continue |
| if not isinstance(m, NonCallableMock): |
| continue |
| if m._mock_new_parent is mock: |
| seal(m) |
