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Unified Diff: tools/telemetry/third_party/mox3/mox3/mox.py

Issue 1647513002: Delete tools/telemetry. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 11 months ago
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Index: tools/telemetry/third_party/mox3/mox3/mox.py
diff --git a/tools/telemetry/third_party/mox3/mox3/mox.py b/tools/telemetry/third_party/mox3/mox3/mox.py
deleted file mode 100644
index 3c10cc8b92ffa31e34cbc93f9adbd884998cafee..0000000000000000000000000000000000000000
--- a/tools/telemetry/third_party/mox3/mox3/mox.py
+++ /dev/null
@@ -1,2168 +0,0 @@
-# Copyright 2008 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-# This is a fork of the pymox library intended to work with Python 3.
-# The file was modified by quermit@gmail.com and dawid.fatyga@gmail.com
-
-"""Mox, an object-mocking framework for Python.
-
-Mox works in the record-replay-verify paradigm. When you first create
-a mock object, it is in record mode. You then programmatically set
-the expected behavior of the mock object (what methods are to be
-called on it, with what parameters, what they should return, and in
-what order).
-
-Once you have set up the expected mock behavior, you put it in replay
-mode. Now the mock responds to method calls just as you told it to.
-If an unexpected method (or an expected method with unexpected
-parameters) is called, then an exception will be raised.
-
-Once you are done interacting with the mock, you need to verify that
-all the expected interactions occured. (Maybe your code exited
-prematurely without calling some cleanup method!) The verify phase
-ensures that every expected method was called; otherwise, an exception
-will be raised.
-
-WARNING! Mock objects created by Mox are not thread-safe. If you are
-call a mock in multiple threads, it should be guarded by a mutex.
-
-TODO(stevepm): Add the option to make mocks thread-safe!
-
-Suggested usage / workflow:
-
- # Create Mox factory
- my_mox = Mox()
-
- # Create a mock data access object
- mock_dao = my_mox.CreateMock(DAOClass)
-
- # Set up expected behavior
- mock_dao.RetrievePersonWithIdentifier('1').AndReturn(person)
- mock_dao.DeletePerson(person)
-
- # Put mocks in replay mode
- my_mox.ReplayAll()
-
- # Inject mock object and run test
- controller.SetDao(mock_dao)
- controller.DeletePersonById('1')
-
- # Verify all methods were called as expected
- my_mox.VerifyAll()
-"""
-
-import collections
-import difflib
-import inspect
-import re
-import types
-import unittest
-
-from mox3 import stubout
-
-
-class Error(AssertionError):
- """Base exception for this module."""
-
- pass
-
-
-class ExpectedMethodCallsError(Error):
- """Raised when an expected method wasn't called.
-
- This can occur if Verify() is called before all expected methods have been
- called.
- """
-
- def __init__(self, expected_methods):
- """Init exception.
-
- Args:
- # expected_methods: A sequence of MockMethod objects that should
- # have been called.
- expected_methods: [MockMethod]
-
- Raises:
- ValueError: if expected_methods contains no methods.
- """
-
- if not expected_methods:
- raise ValueError("There must be at least one expected method")
- Error.__init__(self)
- self._expected_methods = expected_methods
-
- def __str__(self):
- calls = "\n".join(["%3d. %s" % (i, m)
- for i, m in enumerate(self._expected_methods)])
- return "Verify: Expected methods never called:\n%s" % (calls,)
-
-
-class UnexpectedMethodCallError(Error):
- """Raised when an unexpected method is called.
-
- This can occur if a method is called with incorrect parameters, or out of
- the specified order.
- """
-
- def __init__(self, unexpected_method, expected):
- """Init exception.
-
- Args:
- # unexpected_method: MockMethod that was called but was not at the
- # head of the expected_method queue.
- # expected: MockMethod or UnorderedGroup the method should have
- # been in.
- unexpected_method: MockMethod
- expected: MockMethod or UnorderedGroup
- """
-
- Error.__init__(self)
- if expected is None:
- self._str = "Unexpected method call %s" % (unexpected_method,)
- else:
- differ = difflib.Differ()
- diff = differ.compare(str(unexpected_method).splitlines(True),
- str(expected).splitlines(True))
- self._str = ("Unexpected method call."
- " unexpected:- expected:+\n%s"
- % ("\n".join(line.rstrip() for line in diff),))
-
- def __str__(self):
- return self._str
-
-
-class UnknownMethodCallError(Error):
- """Raised if an unknown method is requested of the mock object."""
-
- def __init__(self, unknown_method_name):
- """Init exception.
-
- Args:
- # unknown_method_name: Method call that is not part of the mocked
- # class's public interface.
- unknown_method_name: str
- """
-
- Error.__init__(self)
- self._unknown_method_name = unknown_method_name
-
- def __str__(self):
- return ("Method called is not a member of the object: %s" %
- self._unknown_method_name)
-
-
-class PrivateAttributeError(Error):
- """Raised if a MockObject is passed a private additional attribute name."""
-
- def __init__(self, attr):
- Error.__init__(self)
- self._attr = attr
-
- def __str__(self):
- return ("Attribute '%s' is private and should not be available"
- "in a mock object." % self._attr)
-
-
-class ExpectedMockCreationError(Error):
- """Raised if mocks should have been created by StubOutClassWithMocks."""
-
- def __init__(self, expected_mocks):
- """Init exception.
-
- Args:
- # expected_mocks: A sequence of MockObjects that should have been
- # created
-
- Raises:
- ValueError: if expected_mocks contains no methods.
- """
-
- if not expected_mocks:
- raise ValueError("There must be at least one expected method")
- Error.__init__(self)
- self._expected_mocks = expected_mocks
-
- def __str__(self):
- mocks = "\n".join(["%3d. %s" % (i, m)
- for i, m in enumerate(self._expected_mocks)])
- return "Verify: Expected mocks never created:\n%s" % (mocks,)
-
-
-class UnexpectedMockCreationError(Error):
- """Raised if too many mocks were created by StubOutClassWithMocks."""
-
- def __init__(self, instance, *params, **named_params):
- """Init exception.
-
- Args:
- # instance: the type of obejct that was created
- # params: parameters given during instantiation
- # named_params: named parameters given during instantiation
- """
-
- Error.__init__(self)
- self._instance = instance
- self._params = params
- self._named_params = named_params
-
- def __str__(self):
- args = ", ".join(["%s" % v for i, v in enumerate(self._params)])
- error = "Unexpected mock creation: %s(%s" % (self._instance, args)
-
- if self._named_params:
- error += ", " + ", ".join(["%s=%s" % (k, v) for k, v in
- self._named_params.items()])
-
- error += ")"
- return error
-
-
-class Mox(object):
- """Mox: a factory for creating mock objects."""
-
- # A list of types that should be stubbed out with MockObjects (as
- # opposed to MockAnythings).
- _USE_MOCK_OBJECT = [types.FunctionType, types.ModuleType, types.MethodType]
-
- def __init__(self):
- """Initialize a new Mox."""
-
- self._mock_objects = []
- self.stubs = stubout.StubOutForTesting()
-
- def CreateMock(self, class_to_mock, attrs=None, bounded_to=None):
- """Create a new mock object.
-
- Args:
- # class_to_mock: the class to be mocked
- class_to_mock: class
- attrs: dict of attribute names to values that will be
- set on the mock object. Only public attributes may be set.
- bounded_to: optionally, when class_to_mock is not a class,
- it points to a real class object, to which
- attribute is bound
-
- Returns:
- MockObject that can be used as the class_to_mock would be.
- """
- if attrs is None:
- attrs = {}
- new_mock = MockObject(class_to_mock, attrs=attrs,
- class_to_bind=bounded_to)
- self._mock_objects.append(new_mock)
- return new_mock
-
- def CreateMockAnything(self, description=None):
- """Create a mock that will accept any method calls.
-
- This does not enforce an interface.
-
- Args:
- description: str. Optionally, a descriptive name for the mock object
- being created, for debugging output purposes.
- """
- new_mock = MockAnything(description=description)
- self._mock_objects.append(new_mock)
- return new_mock
-
- def ReplayAll(self):
- """Set all mock objects to replay mode."""
-
- for mock_obj in self._mock_objects:
- mock_obj._Replay()
-
- def VerifyAll(self):
- """Call verify on all mock objects created."""
-
- for mock_obj in self._mock_objects:
- mock_obj._Verify()
-
- def ResetAll(self):
- """Call reset on all mock objects. This does not unset stubs."""
-
- for mock_obj in self._mock_objects:
- mock_obj._Reset()
-
- def StubOutWithMock(self, obj, attr_name, use_mock_anything=False):
- """Replace a method, attribute, etc. with a Mock.
-
- This will replace a class or module with a MockObject, and everything
- else (method, function, etc) with a MockAnything. This can be
- overridden to always use a MockAnything by setting use_mock_anything
- to True.
-
- Args:
- obj: A Python object (class, module, instance, callable).
- attr_name: str. The name of the attribute to replace with a mock.
- use_mock_anything: bool. True if a MockAnything should be used
- regardless of the type of attribute.
- """
-
- if inspect.isclass(obj):
- class_to_bind = obj
- else:
- class_to_bind = None
-
- attr_to_replace = getattr(obj, attr_name)
- attr_type = type(attr_to_replace)
-
- if attr_type == MockAnything or attr_type == MockObject:
- raise TypeError('Cannot mock a MockAnything! Did you remember to '
- 'call UnsetStubs in your previous test?')
-
- type_check = (
- attr_type in self._USE_MOCK_OBJECT or
- inspect.isclass(attr_to_replace) or
- isinstance(attr_to_replace, object))
- if type_check and not use_mock_anything:
- stub = self.CreateMock(attr_to_replace, bounded_to=class_to_bind)
- else:
- stub = self.CreateMockAnything(
- description='Stub for %s' % attr_to_replace)
- stub.__name__ = attr_name
-
- self.stubs.Set(obj, attr_name, stub)
-
- def StubOutClassWithMocks(self, obj, attr_name):
- """Replace a class with a "mock factory" that will create mock objects.
-
- This is useful if the code-under-test directly instantiates
- dependencies. Previously some boilder plate was necessary to
- create a mock that would act as a factory. Using
- StubOutClassWithMocks, once you've stubbed out the class you may
- use the stubbed class as you would any other mock created by mox:
- during the record phase, new mock instances will be created, and
- during replay, the recorded mocks will be returned.
-
- In replay mode
-
- # Example using StubOutWithMock (the old, clunky way):
-
- mock1 = mox.CreateMock(my_import.FooClass)
- mock2 = mox.CreateMock(my_import.FooClass)
- foo_factory = mox.StubOutWithMock(my_import, 'FooClass',
- use_mock_anything=True)
- foo_factory(1, 2).AndReturn(mock1)
- foo_factory(9, 10).AndReturn(mock2)
- mox.ReplayAll()
-
- my_import.FooClass(1, 2) # Returns mock1 again.
- my_import.FooClass(9, 10) # Returns mock2 again.
- mox.VerifyAll()
-
- # Example using StubOutClassWithMocks:
-
- mox.StubOutClassWithMocks(my_import, 'FooClass')
- mock1 = my_import.FooClass(1, 2) # Returns a new mock of FooClass
- mock2 = my_import.FooClass(9, 10) # Returns another mock instance
- mox.ReplayAll()
-
- my_import.FooClass(1, 2) # Returns mock1 again.
- my_import.FooClass(9, 10) # Returns mock2 again.
- mox.VerifyAll()
- """
- attr_to_replace = getattr(obj, attr_name)
- attr_type = type(attr_to_replace)
-
- if attr_type == MockAnything or attr_type == MockObject:
- raise TypeError('Cannot mock a MockAnything! Did you remember to '
- 'call UnsetStubs in your previous test?')
-
- if not inspect.isclass(attr_to_replace):
- raise TypeError('Given attr is not a Class. Use StubOutWithMock.')
-
- factory = _MockObjectFactory(attr_to_replace, self)
- self._mock_objects.append(factory)
- self.stubs.Set(obj, attr_name, factory)
-
- def UnsetStubs(self):
- """Restore stubs to their original state."""
-
- self.stubs.UnsetAll()
-
-
-def Replay(*args):
- """Put mocks into Replay mode.
-
- Args:
- # args is any number of mocks to put into replay mode.
- """
-
- for mock in args:
- mock._Replay()
-
-
-def Verify(*args):
- """Verify mocks.
-
- Args:
- # args is any number of mocks to be verified.
- """
-
- for mock in args:
- mock._Verify()
-
-
-def Reset(*args):
- """Reset mocks.
-
- Args:
- # args is any number of mocks to be reset.
- """
-
- for mock in args:
- mock._Reset()
-
-
-class MockAnything(object):
- """A mock that can be used to mock anything.
-
- This is helpful for mocking classes that do not provide a public interface.
- """
-
- def __init__(self, description=None):
- """Initialize a new MockAnything.
-
- Args:
- description: str. Optionally, a descriptive name for the mock
- object being created, for debugging output purposes.
- """
- self._description = description
- self._Reset()
-
- def __repr__(self):
- if self._description:
- return '<MockAnything instance of %s>' % self._description
- else:
- return '<MockAnything instance>'
-
- def __getattr__(self, method_name):
- """Intercept method calls on this object.
-
- A new MockMethod is returned that is aware of the MockAnything's
- state (record or replay). The call will be recorded or replayed
- by the MockMethod's __call__.
-
- Args:
- # method name: the name of the method being called.
- method_name: str
-
- Returns:
- A new MockMethod aware of MockAnything's state (record or replay).
- """
- if method_name == '__dir__':
- return self.__class__.__dir__.__get__(self, self.__class__)
-
- return self._CreateMockMethod(method_name)
-
- def __str__(self):
- return self._CreateMockMethod('__str__')()
-
- def __call__(self, *args, **kwargs):
- return self._CreateMockMethod('__call__')(*args, **kwargs)
-
- def __getitem__(self, i):
- return self._CreateMockMethod('__getitem__')(i)
-
- def _CreateMockMethod(self, method_name, method_to_mock=None,
- class_to_bind=object):
- """Create a new mock method call and return it.
-
- Args:
- # method_name: the name of the method being called.
- # method_to_mock: The actual method being mocked, used for
- # introspection.
- # class_to_bind: Class to which method is bounded
- # (object by default)
- method_name: str
- method_to_mock: a method object
-
- Returns:
- A new MockMethod aware of MockAnything's state (record or replay).
- """
-
- return MockMethod(method_name, self._expected_calls_queue,
- self._replay_mode, method_to_mock=method_to_mock,
- description=self._description,
- class_to_bind=class_to_bind)
-
- def __nonzero__(self):
- """Return 1 for nonzero so the mock can be used as a conditional."""
-
- return 1
-
- def __bool__(self):
- """Return True for nonzero so the mock can be used as a conditional."""
- return True
-
- def __eq__(self, rhs):
- """Provide custom logic to compare objects."""
-
- return (isinstance(rhs, MockAnything) and
- self._replay_mode == rhs._replay_mode and
- self._expected_calls_queue == rhs._expected_calls_queue)
-
- def __ne__(self, rhs):
- """Provide custom logic to compare objects."""
-
- return not self == rhs
-
- def _Replay(self):
- """Start replaying expected method calls."""
-
- self._replay_mode = True
-
- def _Verify(self):
- """Verify that all of the expected calls have been made.
-
- Raises:
- ExpectedMethodCallsError: if there are still more method calls in
- the expected queue.
- """
-
- # If the list of expected calls is not empty, raise an exception
- if self._expected_calls_queue:
- # The last MultipleTimesGroup is not popped from the queue.
- if (len(self._expected_calls_queue) == 1 and
- isinstance(self._expected_calls_queue[0],
- MultipleTimesGroup) and
- self._expected_calls_queue[0].IsSatisfied()):
- pass
- else:
- raise ExpectedMethodCallsError(self._expected_calls_queue)
-
- def _Reset(self):
- """Reset the state of this mock to record mode with an empty queue."""
-
- # Maintain a list of method calls we are expecting
- self._expected_calls_queue = collections.deque()
-
- # Make sure we are in setup mode, not replay mode
- self._replay_mode = False
-
-
-class MockObject(MockAnything):
- """Mock object that simulates the public/protected interface of a class."""
-
- def __init__(self, class_to_mock, attrs=None, class_to_bind=None):
- """Initialize a mock object.
-
- Determines the methods and properties of the class and stores them.
-
- Args:
- # class_to_mock: class to be mocked
- class_to_mock: class
- attrs: dict of attribute names to values that will be set on the
- mock object. Only public attributes may be set.
- class_to_bind: optionally, when class_to_mock is not a class at
- all, it points to a real class
-
- Raises:
- PrivateAttributeError: if a supplied attribute is not public.
- ValueError: if an attribute would mask an existing method.
- """
- if attrs is None:
- attrs = {}
-
- # Used to hack around the mixin/inheritance of MockAnything, which
- # is not a proper object (it can be anything. :-)
- MockAnything.__dict__['__init__'](self)
-
- # Get a list of all the public and special methods we should mock.
- self._known_methods = set()
- self._known_vars = set()
- self._class_to_mock = class_to_mock
-
- if inspect.isclass(class_to_mock):
- self._class_to_bind = self._class_to_mock
- else:
- self._class_to_bind = class_to_bind
-
- try:
- if inspect.isclass(self._class_to_mock):
- self._description = class_to_mock.__name__
- else:
- self._description = type(class_to_mock).__name__
- except Exception:
- pass
-
- for method in dir(class_to_mock):
- attr = getattr(class_to_mock, method)
- if callable(attr):
- self._known_methods.add(method)
- elif not (type(attr) is property):
- # treating properties as class vars makes little sense.
- self._known_vars.add(method)
-
- # Set additional attributes at instantiation time; this is quicker
- # than manually setting attributes that are normally created in
- # __init__.
- for attr, value in attrs.items():
- if attr.startswith("_"):
- raise PrivateAttributeError(attr)
- elif attr in self._known_methods:
- raise ValueError("'%s' is a method of '%s' objects." % (attr,
- class_to_mock))
- else:
- setattr(self, attr, value)
-
- def _CreateMockMethod(self, *args, **kwargs):
- """Overridden to provide self._class_to_mock to class_to_bind."""
- kwargs.setdefault("class_to_bind", self._class_to_bind)
- return super(MockObject, self)._CreateMockMethod(*args, **kwargs)
-
- def __getattr__(self, name):
- """Intercept attribute request on this object.
-
- If the attribute is a public class variable, it will be returned and
- not recorded as a call.
-
- If the attribute is not a variable, it is handled like a method
- call. The method name is checked against the set of mockable
- methods, and a new MockMethod is returned that is aware of the
- MockObject's state (record or replay). The call will be recorded
- or replayed by the MockMethod's __call__.
-
- Args:
- # name: the name of the attribute being requested.
- name: str
-
- Returns:
- Either a class variable or a new MockMethod that is aware of the
- state of the mock (record or replay).
-
- Raises:
- UnknownMethodCallError if the MockObject does not mock the
- requested method.
- """
-
- if name in self._known_vars:
- return getattr(self._class_to_mock, name)
-
- if name in self._known_methods:
- return self._CreateMockMethod(
- name,
- method_to_mock=getattr(self._class_to_mock, name))
-
- raise UnknownMethodCallError(name)
-
- def __eq__(self, rhs):
- """Provide custom logic to compare objects."""
-
- return (isinstance(rhs, MockObject) and
- self._class_to_mock == rhs._class_to_mock and
- self._replay_mode == rhs._replay_mode and
- self._expected_calls_queue == rhs._expected_calls_queue)
-
- def __setitem__(self, key, value):
- """Custom logic for mocking classes that support item assignment.
-
- Args:
- key: Key to set the value for.
- value: Value to set.
-
- Returns:
- Expected return value in replay mode. A MockMethod object for the
- __setitem__ method that has already been called if not in replay
- mode.
-
- Raises:
- TypeError if the underlying class does not support item assignment.
- UnexpectedMethodCallError if the object does not expect the call to
- __setitem__.
-
- """
- # Verify the class supports item assignment.
- if '__setitem__' not in dir(self._class_to_mock):
- raise TypeError('object does not support item assignment')
-
- # If we are in replay mode then simply call the mock __setitem__ method
- if self._replay_mode:
- return MockMethod('__setitem__', self._expected_calls_queue,
- self._replay_mode)(key, value)
-
- # Otherwise, create a mock method __setitem__.
- return self._CreateMockMethod('__setitem__')(key, value)
-
- def __getitem__(self, key):
- """Provide custom logic for mocking classes that are subscriptable.
-
- Args:
- key: Key to return the value for.
-
- Returns:
- Expected return value in replay mode. A MockMethod object for the
- __getitem__ method that has already been called if not in replay
- mode.
-
- Raises:
- TypeError if the underlying class is not subscriptable.
- UnexpectedMethodCallError if the object does not expect the call to
- __getitem__.
-
- """
- # Verify the class supports item assignment.
- if '__getitem__' not in dir(self._class_to_mock):
- raise TypeError('unsubscriptable object')
-
- # If we are in replay mode then simply call the mock __getitem__ method
- if self._replay_mode:
- return MockMethod('__getitem__', self._expected_calls_queue,
- self._replay_mode)(key)
-
- # Otherwise, create a mock method __getitem__.
- return self._CreateMockMethod('__getitem__')(key)
-
- def __iter__(self):
- """Provide custom logic for mocking classes that are iterable.
-
- Returns:
- Expected return value in replay mode. A MockMethod object for the
- __iter__ method that has already been called if not in replay mode.
-
- Raises:
- TypeError if the underlying class is not iterable.
- UnexpectedMethodCallError if the object does not expect the call to
- __iter__.
-
- """
- methods = dir(self._class_to_mock)
-
- # Verify the class supports iteration.
- if '__iter__' not in methods:
- # If it doesn't have iter method and we are in replay method,
- # then try to iterate using subscripts.
- if '__getitem__' not in methods or not self._replay_mode:
- raise TypeError('not iterable object')
- else:
- results = []
- index = 0
- try:
- while True:
- results.append(self[index])
- index += 1
- except IndexError:
- return iter(results)
-
- # If we are in replay mode then simply call the mock __iter__ method.
- if self._replay_mode:
- return MockMethod('__iter__', self._expected_calls_queue,
- self._replay_mode)()
-
- # Otherwise, create a mock method __iter__.
- return self._CreateMockMethod('__iter__')()
-
- def __contains__(self, key):
- """Provide custom logic for mocking classes that contain items.
-
- Args:
- key: Key to look in container for.
-
- Returns:
- Expected return value in replay mode. A MockMethod object for the
- __contains__ method that has already been called if not in replay
- mode.
-
- Raises:
- TypeError if the underlying class does not implement __contains__
- UnexpectedMethodCaller if the object does not expect the call to
- __contains__.
-
- """
- contains = self._class_to_mock.__dict__.get('__contains__', None)
-
- if contains is None:
- raise TypeError('unsubscriptable object')
-
- if self._replay_mode:
- return MockMethod('__contains__', self._expected_calls_queue,
- self._replay_mode)(key)
-
- return self._CreateMockMethod('__contains__')(key)
-
- def __call__(self, *params, **named_params):
- """Provide custom logic for mocking classes that are callable."""
-
- # Verify the class we are mocking is callable.
- is_callable = hasattr(self._class_to_mock, '__call__')
- if not is_callable:
- raise TypeError('Not callable')
-
- # Because the call is happening directly on this object instead of
- # a method, the call on the mock method is made right here
-
- # If we are mocking a Function, then use the function, and not the
- # __call__ method
- method = None
- if type(self._class_to_mock) in (types.FunctionType, types.MethodType):
- method = self._class_to_mock
- else:
- method = getattr(self._class_to_mock, '__call__')
- mock_method = self._CreateMockMethod('__call__', method_to_mock=method)
-
- return mock_method(*params, **named_params)
-
- @property
- def __name__(self):
- """Return the name that is being mocked."""
- return self._description
-
- # TODO(dejw): this property stopped to work after I introduced changes with
- # binding classes. Fortunately I found a solution in the form of
- # __getattribute__ method below, but this issue should be investigated
- @property
- def __class__(self):
- return self._class_to_mock
-
- def __dir__(self):
- """Return only attributes of a class to mock."""
- return dir(self._class_to_mock)
-
- def __getattribute__(self, name):
- """Return _class_to_mock on __class__ attribute."""
- if name == "__class__":
- return super(MockObject, self).__getattribute__("_class_to_mock")
-
- return super(MockObject, self).__getattribute__(name)
-
-
-class _MockObjectFactory(MockObject):
- """A MockObjectFactory creates mocks and verifies __init__ params.
-
- A MockObjectFactory removes the boiler plate code that was previously
- necessary to stub out direction instantiation of a class.
-
- The MockObjectFactory creates new MockObjects when called and verifies the
- __init__ params are correct when in record mode. When replaying,
- existing mocks are returned, and the __init__ params are verified.
-
- See StubOutWithMock vs StubOutClassWithMocks for more detail.
- """
-
- def __init__(self, class_to_mock, mox_instance):
- MockObject.__init__(self, class_to_mock)
- self._mox = mox_instance
- self._instance_queue = collections.deque()
-
- def __call__(self, *params, **named_params):
- """Instantiate and record that a new mock has been created."""
-
- method = getattr(self._class_to_mock, '__init__')
- mock_method = self._CreateMockMethod('__init__', method_to_mock=method)
- # Note: calling mock_method() is deferred in order to catch the
- # empty instance_queue first.
-
- if self._replay_mode:
- if not self._instance_queue:
- raise UnexpectedMockCreationError(self._class_to_mock, *params,
- **named_params)
-
- mock_method(*params, **named_params)
-
- return self._instance_queue.pop()
- else:
- mock_method(*params, **named_params)
-
- instance = self._mox.CreateMock(self._class_to_mock)
- self._instance_queue.appendleft(instance)
- return instance
-
- def _Verify(self):
- """Verify that all mocks have been created."""
- if self._instance_queue:
- raise ExpectedMockCreationError(self._instance_queue)
- super(_MockObjectFactory, self)._Verify()
-
-
-class MethodSignatureChecker(object):
- """Ensures that methods are called correctly."""
-
- _NEEDED, _DEFAULT, _GIVEN = range(3)
-
- def __init__(self, method, class_to_bind=None):
- """Creates a checker.
-
- Args:
- # method: A method to check.
- # class_to_bind: optionally, a class used to type check first
- # method parameter, only used with unbound methods
- method: function
- class_to_bind: type or None
-
- Raises:
- ValueError: method could not be inspected, so checks aren't
- possible. Some methods and functions like built-ins
- can't be inspected.
- """
- try:
- self._args, varargs, varkw, defaults = inspect.getargspec(method)
- except TypeError:
- raise ValueError('Could not get argument specification for %r'
- % (method,))
- if inspect.ismethod(method) or class_to_bind:
- self._args = self._args[1:] # Skip 'self'.
- self._method = method
- self._instance = None # May contain the instance this is bound to.
- self._instance = getattr(method, "__self__", None)
-
- # _bounded_to determines whether the method is bound or not
- if self._instance:
- self._bounded_to = self._instance.__class__
- else:
- self._bounded_to = class_to_bind or getattr(method, "im_class",
- None)
-
- self._has_varargs = varargs is not None
- self._has_varkw = varkw is not None
- if defaults is None:
- self._required_args = self._args
- self._default_args = []
- else:
- self._required_args = self._args[:-len(defaults)]
- self._default_args = self._args[-len(defaults):]
-
- def _RecordArgumentGiven(self, arg_name, arg_status):
- """Mark an argument as being given.
-
- Args:
- # arg_name: The name of the argument to mark in arg_status.
- # arg_status: Maps argument names to one of
- # _NEEDED, _DEFAULT, _GIVEN.
- arg_name: string
- arg_status: dict
-
- Raises:
- AttributeError: arg_name is already marked as _GIVEN.
- """
- if arg_status.get(arg_name, None) == MethodSignatureChecker._GIVEN:
- raise AttributeError('%s provided more than once' % (arg_name,))
- arg_status[arg_name] = MethodSignatureChecker._GIVEN
-
- def Check(self, params, named_params):
- """Ensures that the parameters used while recording a call are valid.
-
- Args:
- # params: A list of positional parameters.
- # named_params: A dict of named parameters.
- params: list
- named_params: dict
-
- Raises:
- AttributeError: the given parameters don't work with the given
- method.
- """
- arg_status = dict((a, MethodSignatureChecker._NEEDED)
- for a in self._required_args)
- for arg in self._default_args:
- arg_status[arg] = MethodSignatureChecker._DEFAULT
-
- # WARNING: Suspect hack ahead.
- #
- # Check to see if this is an unbound method, where the instance
- # should be bound as the first argument. We try to determine if
- # the first argument (param[0]) is an instance of the class, or it
- # is equivalent to the class (used to account for Comparators).
- #
- # NOTE: If a Func() comparator is used, and the signature is not
- # correct, this will cause extra executions of the function.
- if inspect.ismethod(self._method) or self._bounded_to:
- # The extra param accounts for the bound instance.
- if len(params) > len(self._required_args):
- expected = self._bounded_to
-
- # Check if the param is an instance of the expected class,
- # or check equality (useful for checking Comparators).
-
- # This is a hack to work around the fact that the first
- # parameter can be a Comparator, and the comparison may raise
- # an exception during this comparison, which is OK.
- try:
- param_equality = (params[0] == expected)
- except Exception:
- param_equality = False
-
- if isinstance(params[0], expected) or param_equality:
- params = params[1:]
- # If the IsA() comparator is being used, we need to check the
- # inverse of the usual case - that the given instance is a
- # subclass of the expected class. For example, the code under
- # test does late binding to a subclass.
- elif (isinstance(params[0], IsA) and
- params[0]._IsSubClass(expected)):
- params = params[1:]
-
- # Check that each positional param is valid.
- for i in range(len(params)):
- try:
- arg_name = self._args[i]
- except IndexError:
- if not self._has_varargs:
- raise AttributeError(
- '%s does not take %d or more positional '
- 'arguments' % (self._method.__name__, i))
- else:
- self._RecordArgumentGiven(arg_name, arg_status)
-
- # Check each keyword argument.
- for arg_name in named_params:
- if arg_name not in arg_status and not self._has_varkw:
- raise AttributeError('%s is not expecting keyword argument %s'
- % (self._method.__name__, arg_name))
- self._RecordArgumentGiven(arg_name, arg_status)
-
- # Ensure all the required arguments have been given.
- still_needed = [k for k, v in arg_status.items()
- if v == MethodSignatureChecker._NEEDED]
- if still_needed:
- raise AttributeError('No values given for arguments: %s'
- % (' '.join(sorted(still_needed))))
-
-
-class MockMethod(object):
- """Callable mock method.
-
- A MockMethod should act exactly like the method it mocks, accepting
- parameters and returning a value, or throwing an exception (as specified).
- When this method is called, it can optionally verify whether the called
- method (name and signature) matches the expected method.
- """
-
- def __init__(self, method_name, call_queue, replay_mode,
- method_to_mock=None, description=None, class_to_bind=None):
- """Construct a new mock method.
-
- Args:
- # method_name: the name of the method
- # call_queue: deque of calls, verify this call against the head,
- # or add this call to the queue.
- # replay_mode: False if we are recording, True if we are verifying
- # calls against the call queue.
- # method_to_mock: The actual method being mocked, used for
- # introspection.
- # description: optionally, a descriptive name for this method.
- # Typically this is equal to the descriptive name of
- # the method's class.
- # class_to_bind: optionally, a class that is used for unbound
- # methods (or functions in Python3) to which method
- # is bound, in order not to loose binding
- # information. If given, it will be used for
- # checking the type of first method parameter
- method_name: str
- call_queue: list or deque
- replay_mode: bool
- method_to_mock: a method object
- description: str or None
- class_to_bind: type or None
- """
-
- self._name = method_name
- self.__name__ = method_name
- self._call_queue = call_queue
- if not isinstance(call_queue, collections.deque):
- self._call_queue = collections.deque(self._call_queue)
- self._replay_mode = replay_mode
- self._description = description
-
- self._params = None
- self._named_params = None
- self._return_value = None
- self._exception = None
- self._side_effects = None
-
- try:
- self._checker = MethodSignatureChecker(method_to_mock,
- class_to_bind=class_to_bind)
- except ValueError:
- self._checker = None
-
- def __call__(self, *params, **named_params):
- """Log parameters and return the specified return value.
-
- If the Mock(Anything/Object) associated with this call is in record
- mode, this MockMethod will be pushed onto the expected call queue.
- If the mock is in replay mode, this will pop a MockMethod off the
- top of the queue and verify this call is equal to the expected call.
-
- Raises:
- UnexpectedMethodCall if this call is supposed to match an expected
- method call and it does not.
- """
-
- self._params = params
- self._named_params = named_params
-
- if not self._replay_mode:
- if self._checker is not None:
- self._checker.Check(params, named_params)
- self._call_queue.append(self)
- return self
-
- expected_method = self._VerifyMethodCall()
-
- if expected_method._side_effects:
- result = expected_method._side_effects(*params, **named_params)
- if expected_method._return_value is None:
- expected_method._return_value = result
-
- if expected_method._exception:
- raise expected_method._exception
-
- return expected_method._return_value
-
- def __getattr__(self, name):
- """Raise an AttributeError with a helpful message."""
-
- raise AttributeError(
- 'MockMethod has no attribute "%s". '
- 'Did you remember to put your mocks in replay mode?' % name)
-
- def __iter__(self):
- """Raise a TypeError with a helpful message."""
- raise TypeError(
- 'MockMethod cannot be iterated. '
- 'Did you remember to put your mocks in replay mode?')
-
- def next(self):
- """Raise a TypeError with a helpful message."""
- raise TypeError(
- 'MockMethod cannot be iterated. '
- 'Did you remember to put your mocks in replay mode?')
-
- def __next__(self):
- """Raise a TypeError with a helpful message."""
- raise TypeError(
- 'MockMethod cannot be iterated. '
- 'Did you remember to put your mocks in replay mode?')
-
- def _PopNextMethod(self):
- """Pop the next method from our call queue."""
- try:
- return self._call_queue.popleft()
- except IndexError:
- raise UnexpectedMethodCallError(self, None)
-
- def _VerifyMethodCall(self):
- """Verify the called method is expected.
-
- This can be an ordered method, or part of an unordered set.
-
- Returns:
- The expected mock method.
-
- Raises:
- UnexpectedMethodCall if the method called was not expected.
- """
-
- expected = self._PopNextMethod()
-
- # Loop here, because we might have a MethodGroup followed by another
- # group.
- while isinstance(expected, MethodGroup):
- expected, method = expected.MethodCalled(self)
- if method is not None:
- return method
-
- # This is a mock method, so just check equality.
- if expected != self:
- raise UnexpectedMethodCallError(self, expected)
-
- return expected
-
- def __str__(self):
- params = ', '.join(
- [repr(p) for p in self._params or []] +
- ['%s=%r' % x for x in sorted((self._named_params or {}).items())])
- full_desc = "%s(%s) -> %r" % (self._name, params, self._return_value)
- if self._description:
- full_desc = "%s.%s" % (self._description, full_desc)
- return full_desc
-
- def __hash__(self):
- return id(self)
-
- def __eq__(self, rhs):
- """Test whether this MockMethod is equivalent to another MockMethod.
-
- Args:
- # rhs: the right hand side of the test
- rhs: MockMethod
- """
-
- return (isinstance(rhs, MockMethod) and
- self._name == rhs._name and
- self._params == rhs._params and
- self._named_params == rhs._named_params)
-
- def __ne__(self, rhs):
- """Test if this MockMethod is not equivalent to another MockMethod.
-
- Args:
- # rhs: the right hand side of the test
- rhs: MockMethod
- """
-
- return not self == rhs
-
- def GetPossibleGroup(self):
- """Returns a possible group from the end of the call queue.
-
- Return None if no other methods are on the stack.
- """
-
- # Remove this method from the tail of the queue so we can add it
- # to a group.
- this_method = self._call_queue.pop()
- assert this_method == self
-
- # Determine if the tail of the queue is a group, or just a regular
- # ordered mock method.
- group = None
- try:
- group = self._call_queue[-1]
- except IndexError:
- pass
-
- return group
-
- def _CheckAndCreateNewGroup(self, group_name, group_class):
- """Checks if the last method (a possible group) is an instance of our
- group_class. Adds the current method to this group or creates a
- new one.
-
- Args:
-
- group_name: the name of the group.
- group_class: the class used to create instance of this new group
- """
- group = self.GetPossibleGroup()
-
- # If this is a group, and it is the correct group, add the method.
- if isinstance(group, group_class) and group.group_name() == group_name:
- group.AddMethod(self)
- return self
-
- # Create a new group and add the method.
- new_group = group_class(group_name)
- new_group.AddMethod(self)
- self._call_queue.append(new_group)
- return self
-
- def InAnyOrder(self, group_name="default"):
- """Move this method into a group of unordered calls.
-
- A group of unordered calls must be defined together, and must be
- executed in full before the next expected method can be called.
- There can be multiple groups that are expected serially, if they are
- given different group names. The same group name can be reused if there
- is a standard method call, or a group with a different name, spliced
- between usages.
-
- Args:
- group_name: the name of the unordered group.
-
- Returns:
- self
- """
- return self._CheckAndCreateNewGroup(group_name, UnorderedGroup)
-
- def MultipleTimes(self, group_name="default"):
- """Move method into group of calls which may be called multiple times.
-
- A group of repeating calls must be defined together, and must be
- executed in full before the next expected method can be called.
-
- Args:
- group_name: the name of the unordered group.
-
- Returns:
- self
- """
- return self._CheckAndCreateNewGroup(group_name, MultipleTimesGroup)
-
- def AndReturn(self, return_value):
- """Set the value to return when this method is called.
-
- Args:
- # return_value can be anything.
- """
-
- self._return_value = return_value
- return return_value
-
- def AndRaise(self, exception):
- """Set the exception to raise when this method is called.
-
- Args:
- # exception: the exception to raise when this method is called.
- exception: Exception
- """
-
- self._exception = exception
-
- def WithSideEffects(self, side_effects):
- """Set the side effects that are simulated when this method is called.
-
- Args:
- side_effects: A callable which modifies the parameters or other
- relevant state which a given test case depends on.
-
- Returns:
- Self for chaining with AndReturn and AndRaise.
- """
- self._side_effects = side_effects
- return self
-
-
-class Comparator:
- """Base class for all Mox comparators.
-
- A Comparator can be used as a parameter to a mocked method when the exact
- value is not known. For example, the code you are testing might build up
- a long SQL string that is passed to your mock DAO. You're only interested
- that the IN clause contains the proper primary keys, so you can set your
- mock up as follows:
-
- mock_dao.RunQuery(StrContains('IN (1, 2, 4, 5)')).AndReturn(mock_result)
-
- Now whatever query is passed in must contain the string 'IN (1, 2, 4, 5)'.
-
- A Comparator may replace one or more parameters, for example:
- # return at most 10 rows
- mock_dao.RunQuery(StrContains('SELECT'), 10)
-
- or
-
- # Return some non-deterministic number of rows
- mock_dao.RunQuery(StrContains('SELECT'), IsA(int))
- """
-
- def equals(self, rhs):
- """Special equals method that all comparators must implement.
-
- Args:
- rhs: any python object
- """
-
- raise NotImplementedError('method must be implemented by a subclass.')
-
- def __eq__(self, rhs):
- return self.equals(rhs)
-
- def __ne__(self, rhs):
- return not self.equals(rhs)
-
-
-class Is(Comparator):
- """Comparison class used to check identity, instead of equality."""
-
- def __init__(self, obj):
- self._obj = obj
-
- def equals(self, rhs):
- return rhs is self._obj
-
- def __repr__(self):
- return "<is %r (%s)>" % (self._obj, id(self._obj))
-
-
-class IsA(Comparator):
- """This class wraps a basic Python type or class. It is used to verify
- that a parameter is of the given type or class.
-
- Example:
- mock_dao.Connect(IsA(DbConnectInfo))
- """
-
- def __init__(self, class_name):
- """Initialize IsA
-
- Args:
- class_name: basic python type or a class
- """
-
- self._class_name = class_name
-
- def equals(self, rhs):
- """Check to see if the RHS is an instance of class_name.
-
- Args:
- # rhs: the right hand side of the test
- rhs: object
-
- Returns:
- bool
- """
-
- try:
- return isinstance(rhs, self._class_name)
- except TypeError:
- # Check raw types if there was a type error. This is helpful for
- # things like cStringIO.StringIO.
- return type(rhs) == type(self._class_name)
-
- def _IsSubClass(self, clazz):
- """Check to see if the IsA comparators class is a subclass of clazz.
-
- Args:
- # clazz: a class object
-
- Returns:
- bool
- """
-
- try:
- return issubclass(self._class_name, clazz)
- except TypeError:
- # Check raw types if there was a type error. This is helpful for
- # things like cStringIO.StringIO.
- return type(clazz) == type(self._class_name)
-
- def __repr__(self):
- return 'mox.IsA(%s) ' % str(self._class_name)
-
-
-class IsAlmost(Comparator):
- """Comparison class used to check whether a parameter is nearly equal
- to a given value. Generally useful for floating point numbers.
-
- Example mock_dao.SetTimeout((IsAlmost(3.9)))
- """
-
- def __init__(self, float_value, places=7):
- """Initialize IsAlmost.
-
- Args:
- float_value: The value for making the comparison.
- places: The number of decimal places to round to.
- """
-
- self._float_value = float_value
- self._places = places
-
- def equals(self, rhs):
- """Check to see if RHS is almost equal to float_value
-
- Args:
- rhs: the value to compare to float_value
-
- Returns:
- bool
- """
-
- try:
- return round(rhs - self._float_value, self._places) == 0
- except Exception:
- # Probably because either float_value or rhs is not a number.
- return False
-
- def __repr__(self):
- return str(self._float_value)
-
-
-class StrContains(Comparator):
- """Comparison class used to check whether a substring exists in a
- string parameter. This can be useful in mocking a database with SQL
- passed in as a string parameter, for example.
-
- Example:
- mock_dao.RunQuery(StrContains('IN (1, 2, 4, 5)')).AndReturn(mock_result)
- """
-
- def __init__(self, search_string):
- """Initialize.
-
- Args:
- # search_string: the string you are searching for
- search_string: str
- """
-
- self._search_string = search_string
-
- def equals(self, rhs):
- """Check to see if the search_string is contained in the rhs string.
-
- Args:
- # rhs: the right hand side of the test
- rhs: object
-
- Returns:
- bool
- """
-
- try:
- return rhs.find(self._search_string) > -1
- except Exception:
- return False
-
- def __repr__(self):
- return '<str containing \'%s\'>' % self._search_string
-
-
-class Regex(Comparator):
- """Checks if a string matches a regular expression.
-
- This uses a given regular expression to determine equality.
- """
-
- def __init__(self, pattern, flags=0):
- """Initialize.
-
- Args:
- # pattern is the regular expression to search for
- pattern: str
- # flags passed to re.compile function as the second argument
- flags: int
- """
- self.flags = flags
- self.regex = re.compile(pattern, flags=flags)
-
- def equals(self, rhs):
- """Check to see if rhs matches regular expression pattern.
-
- Returns:
- bool
- """
-
- try:
- return self.regex.search(rhs) is not None
- except Exception:
- return False
-
- def __repr__(self):
- s = '<regular expression \'%s\'' % self.regex.pattern
- if self.flags:
- s += ', flags=%d' % self.flags
- s += '>'
- return s
-
-
-class In(Comparator):
- """Checks whether an item (or key) is in a list (or dict) parameter.
-
- Example:
- mock_dao.GetUsersInfo(In('expectedUserName')).AndReturn(mock_result)
- """
-
- def __init__(self, key):
- """Initialize.
-
- Args:
- # key is any thing that could be in a list or a key in a dict
- """
-
- self._key = key
-
- def equals(self, rhs):
- """Check to see whether key is in rhs.
-
- Args:
- rhs: dict
-
- Returns:
- bool
- """
-
- try:
- return self._key in rhs
- except Exception:
- return False
-
- def __repr__(self):
- return '<sequence or map containing \'%s\'>' % str(self._key)
-
-
-class Not(Comparator):
- """Checks whether a predicates is False.
-
- Example:
- mock_dao.UpdateUsers(Not(ContainsKeyValue('stevepm',
- stevepm_user_info)))
- """
-
- def __init__(self, predicate):
- """Initialize.
-
- Args:
- # predicate: a Comparator instance.
- """
-
- assert isinstance(predicate, Comparator), ("predicate %r must be a"
- " Comparator." % predicate)
- self._predicate = predicate
-
- def equals(self, rhs):
- """Check to see whether the predicate is False.
-
- Args:
- rhs: A value that will be given in argument of the predicate.
-
- Returns:
- bool
- """
-
- try:
- return not self._predicate.equals(rhs)
- except Exception:
- return False
-
- def __repr__(self):
- return '<not \'%s\'>' % self._predicate
-
-
-class ContainsKeyValue(Comparator):
- """Checks whether a key/value pair is in a dict parameter.
-
- Example:
- mock_dao.UpdateUsers(ContainsKeyValue('stevepm', stevepm_user_info))
- """
-
- def __init__(self, key, value):
- """Initialize.
-
- Args:
- # key: a key in a dict
- # value: the corresponding value
- """
-
- self._key = key
- self._value = value
-
- def equals(self, rhs):
- """Check whether the given key/value pair is in the rhs dict.
-
- Returns:
- bool
- """
-
- try:
- return rhs[self._key] == self._value
- except Exception:
- return False
-
- def __repr__(self):
- return '<map containing the entry \'%s: %s\'>' % (str(self._key),
- str(self._value))
-
-
-class ContainsAttributeValue(Comparator):
- """Checks whether passed parameter contains attributes with a given value.
-
- Example:
- mock_dao.UpdateSomething(ContainsAttribute('stevepm', stevepm_user_info))
- """
-
- def __init__(self, key, value):
- """Initialize.
-
- Args:
- # key: an attribute name of an object
- # value: the corresponding value
- """
-
- self._key = key
- self._value = value
-
- def equals(self, rhs):
- """Check if the given attribute has a matching value in the rhs object.
-
- Returns:
- bool
- """
-
- try:
- return getattr(rhs, self._key) == self._value
- except Exception:
- return False
-
-
-class SameElementsAs(Comparator):
- """Checks whether sequences contain the same elements (ignoring order).
-
- Example:
- mock_dao.ProcessUsers(SameElementsAs('stevepm', 'salomaki'))
- """
-
- def __init__(self, expected_seq):
- """Initialize.
-
- Args:
- expected_seq: a sequence
- """
- # Store in case expected_seq is an iterator.
- self._expected_list = list(expected_seq)
-
- def equals(self, actual_seq):
- """Check to see whether actual_seq has same elements as expected_seq.
-
- Args:
- actual_seq: sequence
-
- Returns:
- bool
- """
- try:
- # Store in case actual_seq is an iterator. We potentially iterate
- # twice: once to make the dict, once in the list fallback.
- actual_list = list(actual_seq)
- except TypeError:
- # actual_seq cannot be read as a sequence.
- #
- # This happens because Mox uses __eq__ both to check object
- # equality (in MethodSignatureChecker) and to invoke Comparators.
- return False
-
- try:
- return set(self._expected_list) == set(actual_list)
- except TypeError:
- # Fall back to slower list-compare if any of the objects
- # are unhashable.
- if len(self._expected_list) != len(actual_list):
- return False
- for el in actual_list:
- if el not in self._expected_list:
- return False
- return True
-
- def __repr__(self):
- return '<sequence with same elements as \'%s\'>' % self._expected_list
-
-
-class And(Comparator):
- """Evaluates one or more Comparators on RHS, returns an AND of the results.
- """
-
- def __init__(self, *args):
- """Initialize.
-
- Args:
- *args: One or more Comparator
- """
-
- self._comparators = args
-
- def equals(self, rhs):
- """Checks whether all Comparators are equal to rhs.
-
- Args:
- # rhs: can be anything
-
- Returns:
- bool
- """
-
- for comparator in self._comparators:
- if not comparator.equals(rhs):
- return False
-
- return True
-
- def __repr__(self):
- return '<AND %s>' % str(self._comparators)
-
-
-class Or(Comparator):
- """Evaluates one or more Comparators on RHS; returns OR of the results."""
-
- def __init__(self, *args):
- """Initialize.
-
- Args:
- *args: One or more Mox comparators
- """
-
- self._comparators = args
-
- def equals(self, rhs):
- """Checks whether any Comparator is equal to rhs.
-
- Args:
- # rhs: can be anything
-
- Returns:
- bool
- """
-
- for comparator in self._comparators:
- if comparator.equals(rhs):
- return True
-
- return False
-
- def __repr__(self):
- return '<OR %s>' % str(self._comparators)
-
-
-class Func(Comparator):
- """Call a function that should verify the parameter passed in is correct.
-
- You may need the ability to perform more advanced operations on the
- parameter in order to validate it. You can use this to have a callable
- validate any parameter. The callable should return either True or False.
-
-
- Example:
-
- def myParamValidator(param):
- # Advanced logic here
- return True
-
- mock_dao.DoSomething(Func(myParamValidator), true)
- """
-
- def __init__(self, func):
- """Initialize.
-
- Args:
- func: callable that takes one parameter and returns a bool
- """
-
- self._func = func
-
- def equals(self, rhs):
- """Test whether rhs passes the function test.
-
- rhs is passed into func.
-
- Args:
- rhs: any python object
-
- Returns:
- the result of func(rhs)
- """
-
- return self._func(rhs)
-
- def __repr__(self):
- return str(self._func)
-
-
-class IgnoreArg(Comparator):
- """Ignore an argument.
-
- This can be used when we don't care about an argument of a method call.
-
- Example:
- # Check if CastMagic is called with 3 as first arg and
- # 'disappear' as third.
- mymock.CastMagic(3, IgnoreArg(), 'disappear')
- """
-
- def equals(self, unused_rhs):
- """Ignores arguments and returns True.
-
- Args:
- unused_rhs: any python object
-
- Returns:
- always returns True
- """
-
- return True
-
- def __repr__(self):
- return '<IgnoreArg>'
-
-
-class Value(Comparator):
- """Compares argument against a remembered value.
-
- To be used in conjunction with Remember comparator. See Remember()
- for example.
- """
-
- def __init__(self):
- self._value = None
- self._has_value = False
-
- def store_value(self, rhs):
- self._value = rhs
- self._has_value = True
-
- def equals(self, rhs):
- if not self._has_value:
- return False
- else:
- return rhs == self._value
-
- def __repr__(self):
- if self._has_value:
- return "<Value %r>" % self._value
- else:
- return "<Value>"
-
-
-class Remember(Comparator):
- """Remembers the argument to a value store.
-
- To be used in conjunction with Value comparator.
-
- Example:
- # Remember the argument for one method call.
- users_list = Value()
- mock_dao.ProcessUsers(Remember(users_list))
-
- # Check argument against remembered value.
- mock_dao.ReportUsers(users_list)
- """
-
- def __init__(self, value_store):
- if not isinstance(value_store, Value):
- raise TypeError(
- "value_store is not an instance of the Value class")
- self._value_store = value_store
-
- def equals(self, rhs):
- self._value_store.store_value(rhs)
- return True
-
- def __repr__(self):
- return "<Remember %d>" % id(self._value_store)
-
-
-class MethodGroup(object):
- """Base class containing common behaviour for MethodGroups."""
-
- def __init__(self, group_name):
- self._group_name = group_name
-
- def group_name(self):
- return self._group_name
-
- def __str__(self):
- return '<%s "%s">' % (self.__class__.__name__, self._group_name)
-
- def AddMethod(self, mock_method):
- raise NotImplementedError
-
- def MethodCalled(self, mock_method):
- raise NotImplementedError
-
- def IsSatisfied(self):
- raise NotImplementedError
-
-
-class UnorderedGroup(MethodGroup):
- """UnorderedGroup holds a set of method calls that may occur in any order.
-
- This construct is helpful for non-deterministic events, such as iterating
- over the keys of a dict.
- """
-
- def __init__(self, group_name):
- super(UnorderedGroup, self).__init__(group_name)
- self._methods = []
-
- def __str__(self):
- return '%s "%s" pending calls:\n%s' % (
- self.__class__.__name__,
- self._group_name,
- "\n".join(str(method) for method in self._methods))
-
- def AddMethod(self, mock_method):
- """Add a method to this group.
-
- Args:
- mock_method: A mock method to be added to this group.
- """
-
- self._methods.append(mock_method)
-
- def MethodCalled(self, mock_method):
- """Remove a method call from the group.
-
- If the method is not in the set, an UnexpectedMethodCallError will be
- raised.
-
- Args:
- mock_method: a mock method that should be equal to a method in the
- group.
-
- Returns:
- The mock method from the group
-
- Raises:
- UnexpectedMethodCallError if the mock_method was not in the group.
- """
-
- # Check to see if this method exists, and if so, remove it from the set
- # and return it.
- for method in self._methods:
- if method == mock_method:
- # Remove the called mock_method instead of the method in the
- # group. The called method will match any comparators when
- # equality is checked during removal. The method in the group
- # could pass a comparator to another comparator during the
- # equality check.
- self._methods.remove(mock_method)
-
- # If group is not empty, put it back at the head of the queue.
- if not self.IsSatisfied():
- mock_method._call_queue.appendleft(self)
-
- return self, method
-
- raise UnexpectedMethodCallError(mock_method, self)
-
- def IsSatisfied(self):
- """Return True if there are not any methods in this group."""
-
- return len(self._methods) == 0
-
-
-class MultipleTimesGroup(MethodGroup):
- """MultipleTimesGroup holds methods that may be called any number of times.
-
- Note: Each method must be called at least once.
-
- This is helpful, if you don't know or care how many times a method is
- called.
- """
-
- def __init__(self, group_name):
- super(MultipleTimesGroup, self).__init__(group_name)
- self._methods = set()
- self._methods_left = set()
-
- def AddMethod(self, mock_method):
- """Add a method to this group.
-
- Args:
- mock_method: A mock method to be added to this group.
- """
-
- self._methods.add(mock_method)
- self._methods_left.add(mock_method)
-
- def MethodCalled(self, mock_method):
- """Remove a method call from the group.
-
- If the method is not in the set, an UnexpectedMethodCallError will be
- raised.
-
- Args:
- mock_method: a mock method that should be equal to a method in the
- group.
-
- Returns:
- The mock method from the group
-
- Raises:
- UnexpectedMethodCallError if the mock_method was not in the group.
- """
-
- # Check to see if this method exists, and if so add it to the set of
- # called methods.
- for method in self._methods:
- if method == mock_method:
- self._methods_left.discard(method)
- # Always put this group back on top of the queue,
- # because we don't know when we are done.
- mock_method._call_queue.appendleft(self)
- return self, method
-
- if self.IsSatisfied():
- next_method = mock_method._PopNextMethod()
- return next_method, None
- else:
- raise UnexpectedMethodCallError(mock_method, self)
-
- def IsSatisfied(self):
- """Return True if all methods in group are called at least once."""
- return len(self._methods_left) == 0
-
-
-class MoxMetaTestBase(type):
- """Metaclass to add mox cleanup and verification to every test.
-
- As the mox unit testing class is being constructed (MoxTestBase or a
- subclass), this metaclass will modify all test functions to call the
- CleanUpMox method of the test class after they finish. This means that
- unstubbing and verifying will happen for every test with no additional
- code, and any failures will result in test failures as opposed to errors.
- """
-
- def __init__(cls, name, bases, d):
- type.__init__(cls, name, bases, d)
-
- # also get all the attributes from the base classes to account
- # for a case when test class is not the immediate child of MoxTestBase
- for base in bases:
- for attr_name in dir(base):
- if attr_name not in d:
- d[attr_name] = getattr(base, attr_name)
-
- for func_name, func in d.items():
- if func_name.startswith('test') and callable(func):
-
- setattr(cls, func_name, MoxMetaTestBase.CleanUpTest(cls, func))
-
- @staticmethod
- def CleanUpTest(cls, func):
- """Adds Mox cleanup code to any MoxTestBase method.
-
- Always unsets stubs after a test. Will verify all mocks for tests that
- otherwise pass.
-
- Args:
- cls: MoxTestBase or subclass; the class whose method we are
- altering.
- func: method; the method of the MoxTestBase test class we wish to
- alter.
-
- Returns:
- The modified method.
- """
- def new_method(self, *args, **kwargs):
- mox_obj = getattr(self, 'mox', None)
- stubout_obj = getattr(self, 'stubs', None)
- cleanup_mox = False
- cleanup_stubout = False
- if mox_obj and isinstance(mox_obj, Mox):
- cleanup_mox = True
- if stubout_obj and isinstance(stubout_obj,
- stubout.StubOutForTesting):
- cleanup_stubout = True
- try:
- func(self, *args, **kwargs)
- finally:
- if cleanup_mox:
- mox_obj.UnsetStubs()
- if cleanup_stubout:
- stubout_obj.UnsetAll()
- stubout_obj.SmartUnsetAll()
- if cleanup_mox:
- mox_obj.VerifyAll()
- new_method.__name__ = func.__name__
- new_method.__doc__ = func.__doc__
- new_method.__module__ = func.__module__
- return new_method
-
-
-_MoxTestBase = MoxMetaTestBase('_MoxTestBase', (unittest.TestCase, ), {})
-
-
-class MoxTestBase(_MoxTestBase):
- """Convenience test class to make stubbing easier.
-
- Sets up a "mox" attribute which is an instance of Mox (any mox tests will
- want this), and a "stubs" attribute that is an instance of
- StubOutForTesting (needed at times). Also automatically unsets any stubs
- and verifies that all mock methods have been called at the end of each
- test, eliminating boilerplate code.
- """
-
- def setUp(self):
- super(MoxTestBase, self).setUp()
- self.mox = Mox()
- self.stubs = stubout.StubOutForTesting()
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