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Commit e9597918 authored by maruel@chromium.org's avatar maruel@chromium.org
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Add pymox, fixed non-deterministic pprint.pformat output expectation. 

pymox auto-checkout never really worked well so check-in pymox directly.

pprint.pformat is non-determinist in one test. Worked around the issue.

TEST=unit tests
BUG=none
Review URL: http://codereview.chromium.org/266043

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@29398 0039d316-1c4b-4281-b951-d872f2087c98
parent a4899042
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Showing with 3914 additions and 35 deletions
tests/gclient_test.py
View file @ e9597918
......@@ -31,6 +31,17 @@ import super_mox
from super_mox import mox
class IsOneOf(mox.Comparator):
def __init__(self, keys):
self._keys = keys
def equals(self, rhs):
return rhs in self._keys
def __repr__(self):
return '<sequence or map containing \'%s\'>' % str(self._keys)
class BaseTestCase(super_mox.SuperMoxTestBase):
def setUp(self):
super_mox.SuperMoxTestBase.setUp(self)
......@@ -393,10 +404,15 @@ class GClientClassTestCase(GclientTestCase):
"} ]\n"
) % (solution_name, self.url)
entries_content = (
# pprint.pformat() is non-deterministic in this case!!
entries_content1 = (
"entries = \\\n"
"{ '%s': '%s'}\n"
) % (solution_name, self.url)
entries_content2 = (
"entries = \\\n"
"{'%s': '%s'}\n"
) % (solution_name, self.url)
options = self.Options()
......@@ -420,7 +436,7 @@ class GClientClassTestCase(GclientTestCase):
# After everything is done, an attempt is made to write an entries
# file.
gclient.FileWrite(os.path.join(self.root_dir, options.entries_filename),
entries_content)
IsOneOf((entries_content1, entries_content2)))
self.mox.ReplayAll()
client = self._gclient_gclient(self.root_dir, options)
......
tests/pymox/COPYING 0 → 100644
View file @ e9597918
Apache License
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tests/pymox/MANIFEST.in 0 → 100644
View file @ e9597918
include COPYING
include mox_test.py
include mox_test_helper.py
include stubout_test.py
include stubout_testee.py
tests/pymox/README 0 → 100644
View file @ e9597918
Mox is an open source mock object framework for Python, inspired by
the Java library EasyMock.
To install:
$ python setup.py install
To run Mox's internal tests:
$ python mox_test.py
Basic usage:
import unittest
import mox
class PersonTest(mox.MoxTestBase):
def testUsingMox(self):
# Create a mock Person
mock_person = self.mox.CreateMock(Person)
test_person = ...
test_primary_key = ...
unknown_person = ...
# Expect InsertPerson to be called with test_person; return
# test_primary_key at that point
mock_person.InsertPerson(test_person).AndReturn(test_primary_key)
# Raise an exception when this is called
mock_person.DeletePerson(unknown_person).AndRaise(UnknownPersonError())
# Switch from record mode to replay mode
self.mox.ReplayAll()
# Run the test
ret_pk = mock_person.InsertPerson(test_person)
self.assertEquals(test_primary_key, ret_pk)
self.assertRaises(UnknownPersonError, mock_person, unknown_person)
For more documentation, see:
http://code.google.com/p/pymox/wiki/MoxDocumentation
For more information, see:
http://code.google.com/p/pymox/
Our user and developer discussion group is:
http://groups.google.com/group/mox-discuss
Mox is Copyright 2008 Google Inc, and licensed under the Apache
License, Version 2.0; see the file COPYING for details. If you would
like to help us improve Mox, join the group.
tests/pymox/mox.py 0 → 100644
View file @ e9597918
#!/usr/bin/python2.4
#
# 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.
"""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()
"""
from collections import deque
import difflib
import inspect
import re
import types
import unittest
import stubout
class Error(AssertionError):
"""Base exception for this module."""
pass
class ExpectedMethodCallsError(Error):
"""Raised when 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(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 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.ClassType, types.InstanceType, types.ModuleType,
types.ObjectType, types.TypeType]
def __init__(self):
"""Initialize a new Mox."""
self._mock_objects = []
self.stubs = stubout.StubOutForTesting()
def CreateMock(self, class_to_mock):
"""Create a new mock object.
Args:
# class_to_mock: the class to be mocked
class_to_mock: class
Returns:
MockObject that can be used as the class_to_mock would be.
"""
new_mock = MockObject(class_to_mock)
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.
"""
attr_to_replace = getattr(obj, attr_name)
# Check for a MockAnything. This could cause confusing problems later on.
if attr_to_replace == MockAnything():
raise TypeError('Cannot mock a MockAnything! Did you remember to '
'call UnsetStubs in your previous test?')
if type(attr_to_replace) in self._USE_MOCK_OBJECT and not use_mock_anything:
stub = self.CreateMock(attr_to_replace)
else:
stub = self.CreateMockAnything(description='Stub for %s' % attr_to_replace)
self.stubs.Set(obj, attr_name, stub)
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:
"""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 __str__(self):
return "<MockAnything instance at %s>" % id(self)
def __repr__(self):
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).
"""
return self._CreateMockMethod(method_name)
def _CreateMockMethod(self, method_name, method_to_mock=None):
"""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.
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)
def __nonzero__(self):
"""Return 1 for nonzero so the mock can be used as a conditional."""
return 1
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 = deque()
# Make sure we are in setup mode, not replay mode
self._replay_mode = False
class MockObject(MockAnything, object):
"""A mock object that simulates the public/protected interface of a class."""
def __init__(self, class_to_mock):
"""Initialize a mock object.
This determines the methods and properties of the class and stores them.
Args:
# class_to_mock: class to be mocked
class_to_mock: class
"""
# This is 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
for method in dir(class_to_mock):
if callable(getattr(class_to_mock, method)):
self._known_methods.add(method)
else:
self._known_vars.add(method)
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):
"""Provide 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.
callable = hasattr(self._class_to_mock, '__call__')
if not 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
mock_method = self._CreateMockMethod('__call__')
return mock_method(*params, **named_params)
@property
def __class__(self):
"""Return the class that is being mocked."""
return self._class_to_mock
class MethodCallChecker(object):
"""Ensures that methods are called correctly."""
_NEEDED, _DEFAULT, _GIVEN = range(3)
def __init__(self, method):
"""Creates a checker.
Args:
# method: A method to check.
method: function
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):
self._args = self._args[1:] # Skip 'self'.
self._method = method
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) == MethodCallChecker._GIVEN:
raise AttributeError('%s provided more than once' % (arg_name,))
arg_status[arg_name] = MethodCallChecker._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, MethodCallChecker._NEEDED)
for a in self._required_args)
for arg in self._default_args:
arg_status[arg] = MethodCallChecker._DEFAULT
# 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.iteritems()
if v == MethodCallChecker._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):
"""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.
method_name: str
call_queue: list or deque
replay_mode: bool
method_to_mock: a method object
description: str or None
"""
self._name = method_name
self._call_queue = call_queue
if not isinstance(call_queue, deque):
self._call_queue = 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 = MethodCallChecker(method_to_mock)
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:
expected_method._side_effects(*params, **named_params)
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 _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 __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 whether 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 or 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 this 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 mehtod 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 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 __repr__(self):
return 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 TypeError:
# This is 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.regex = re.compile(pattern, flags=flags)
def equals(self, rhs):
"""Check to see if rhs matches regular expression pattern.
Returns:
bool
"""
return self.regex.search(rhs) is not None
def __repr__(self):
s = '<regular expression \'%s\'' % self.regex.pattern
if self.regex.flags:
s += ', flags=%d' % self.regex.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
"""
return self._key in rhs
def __repr__(self):
return '<sequence or map containing \'%s\'>' % 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
"""
return not self._predicate.equals(rhs)
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\'>' % (self._key, self._value)
class SameElementsAs(Comparator):
"""Checks whether iterables contain the same elements (ignoring order).
Example:
mock_dao.ProcessUsers(SameElementsAs('stevepm', 'salomaki'))
"""
def __init__(self, expected_seq):
"""Initialize.
Args:
expected_seq: a sequence
"""
self._expected_seq = 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:
expected = dict([(element, None) for element in self._expected_seq])
actual = dict([(element, None) for element in actual_seq])
except TypeError:
# Fall back to slower list-compare if any of the objects are unhashable.
expected = list(self._expected_seq)
actual = list(actual_seq)
expected.sort()
actual.sort()
return expected == actual
def __repr__(self):
return '<sequence with same elements as \'%s\'>' % self._expected_seq
class And(Comparator):
"""Evaluates one or more Comparators on RHS and 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 and returns an 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 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 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 this 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 this 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):
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 test 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)
cleanup_mox = False
if mox_obj and isinstance(mox_obj, Mox):
cleanup_mox = True
try:
func(self, *args, **kwargs)
finally:
if cleanup_mox:
mox_obj.UnsetStubs()
if cleanup_mox:
mox_obj.VerifyAll()
new_method.__name__ = func.__name__
new_method.__doc__ = func.__doc__
new_method.__module__ = func.__module__
return new_method
class MoxTestBase(unittest.TestCase):
"""Convenience test class to make stubbing easier.
Sets up a "mox" attribute which is an instance of Mox - any mox tests will
want this. Also automatically unsets any stubs and verifies that all mock
methods have been called at the end of each test, eliminating boilerplate
code.
"""
__metaclass__ = MoxMetaTestBase
def setUp(self):
super(MoxTestBase, self).setUp()
self.mox = Mox()
tests/pymox/mox_test.py 0 → 100644
View file @ e9597918
#!/usr/bin/python2.4
#
# Unit tests for Mox.
#
# 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.
import cStringIO
import unittest
import re
import mox
import mox_test_helper
class ExpectedMethodCallsErrorTest(unittest.TestCase):
"""Test creation and string conversion of ExpectedMethodCallsError."""
def testAtLeastOneMethod(self):
self.assertRaises(ValueError, mox.ExpectedMethodCallsError, [])
def testOneError(self):
method = mox.MockMethod("testMethod", [], False)
method(1, 2).AndReturn('output')
e = mox.ExpectedMethodCallsError([method])
self.assertEqual(
"Verify: Expected methods never called:\n"
" 0. testMethod(1, 2) -> 'output'",
str(e))
def testManyErrors(self):
method1 = mox.MockMethod("testMethod", [], False)
method1(1, 2).AndReturn('output')
method2 = mox.MockMethod("testMethod", [], False)
method2(a=1, b=2, c="only named")
method3 = mox.MockMethod("testMethod2", [], False)
method3().AndReturn(44)
method4 = mox.MockMethod("testMethod", [], False)
method4(1, 2).AndReturn('output')
e = mox.ExpectedMethodCallsError([method1, method2, method3, method4])
self.assertEqual(
"Verify: Expected methods never called:\n"
" 0. testMethod(1, 2) -> 'output'\n"
" 1. testMethod(a=1, b=2, c='only named') -> None\n"
" 2. testMethod2() -> 44\n"
" 3. testMethod(1, 2) -> 'output'",
str(e))
class OrTest(unittest.TestCase):
"""Test Or correctly chains Comparators."""
def testValidOr(self):
"""Or should be True if either Comparator returns True."""
self.assert_(mox.Or(mox.IsA(dict), mox.IsA(str)) == {})
self.assert_(mox.Or(mox.IsA(dict), mox.IsA(str)) == 'test')
self.assert_(mox.Or(mox.IsA(str), mox.IsA(str)) == 'test')
def testInvalidOr(self):
"""Or should be False if both Comparators return False."""
self.failIf(mox.Or(mox.IsA(dict), mox.IsA(str)) == 0)
class AndTest(unittest.TestCase):
"""Test And correctly chains Comparators."""
def testValidAnd(self):
"""And should be True if both Comparators return True."""
self.assert_(mox.And(mox.IsA(str), mox.IsA(str)) == '1')
def testClauseOneFails(self):
"""And should be False if the first Comparator returns False."""
self.failIf(mox.And(mox.IsA(dict), mox.IsA(str)) == '1')
def testAdvancedUsage(self):
"""And should work with other Comparators.
Note: this test is reliant on In and ContainsKeyValue.
"""
test_dict = {"mock" : "obj", "testing" : "isCOOL"}
self.assert_(mox.And(mox.In("testing"),
mox.ContainsKeyValue("mock", "obj")) == test_dict)
def testAdvancedUsageFails(self):
"""Note: this test is reliant on In and ContainsKeyValue."""
test_dict = {"mock" : "obj", "testing" : "isCOOL"}
self.failIf(mox.And(mox.In("NOTFOUND"),
mox.ContainsKeyValue("mock", "obj")) == test_dict)
class SameElementsAsTest(unittest.TestCase):
"""Test SameElementsAs correctly identifies sequences with same elements."""
def testSortedLists(self):
"""Should return True if two lists are exactly equal."""
self.assert_(mox.SameElementsAs([1, 2.0, 'c']) == [1, 2.0, 'c'])
def testUnsortedLists(self):
"""Should return True if two lists are unequal but have same elements."""
self.assert_(mox.SameElementsAs([1, 2.0, 'c']) == [2.0, 'c', 1])
def testUnhashableLists(self):
"""Should return True if two lists have the same unhashable elements."""
self.assert_(mox.SameElementsAs([{'a': 1}, {2: 'b'}]) ==
[{2: 'b'}, {'a': 1}])
def testEmptyLists(self):
"""Should return True for two empty lists."""
self.assert_(mox.SameElementsAs([]) == [])
def testUnequalLists(self):
"""Should return False if the lists are not equal."""
self.failIf(mox.SameElementsAs([1, 2.0, 'c']) == [2.0, 'c'])
def testUnequalUnhashableLists(self):
"""Should return False if two lists with unhashable elements are unequal."""
self.failIf(mox.SameElementsAs([{'a': 1}, {2: 'b'}]) == [{2: 'b'}])
class ContainsKeyValueTest(unittest.TestCase):
"""Test ContainsKeyValue correctly identifies key/value pairs in a dict.
"""
def testValidPair(self):
"""Should return True if the key value is in the dict."""
self.assert_(mox.ContainsKeyValue("key", 1) == {"key": 1})
def testInvalidValue(self):
"""Should return False if the value is not correct."""
self.failIf(mox.ContainsKeyValue("key", 1) == {"key": 2})
def testInvalidKey(self):
"""Should return False if they key is not in the dict."""
self.failIf(mox.ContainsKeyValue("qux", 1) == {"key": 2})
class InTest(unittest.TestCase):
"""Test In correctly identifies a key in a list/dict"""
def testItemInList(self):
"""Should return True if the item is in the list."""
self.assert_(mox.In(1) == [1, 2, 3])
def testKeyInDict(self):
"""Should return True if the item is a key in a dict."""
self.assert_(mox.In("test") == {"test" : "module"})
class NotTest(unittest.TestCase):
"""Test Not correctly identifies False predicates."""
def testItemInList(self):
"""Should return True if the item is NOT in the list."""
self.assert_(mox.Not(mox.In(42)) == [1, 2, 3])
def testKeyInDict(self):
"""Should return True if the item is NOT a key in a dict."""
self.assert_(mox.Not(mox.In("foo")) == {"key" : 42})
def testInvalidKeyWithNot(self):
"""Should return False if they key is NOT in the dict."""
self.assert_(mox.Not(mox.ContainsKeyValue("qux", 1)) == {"key": 2})
class StrContainsTest(unittest.TestCase):
"""Test StrContains correctly checks for substring occurrence of a parameter.
"""
def testValidSubstringAtStart(self):
"""Should return True if the substring is at the start of the string."""
self.assert_(mox.StrContains("hello") == "hello world")
def testValidSubstringInMiddle(self):
"""Should return True if the substring is in the middle of the string."""
self.assert_(mox.StrContains("lo wo") == "hello world")
def testValidSubstringAtEnd(self):
"""Should return True if the substring is at the end of the string."""
self.assert_(mox.StrContains("ld") == "hello world")
def testInvaildSubstring(self):
"""Should return False if the substring is not in the string."""
self.failIf(mox.StrContains("AAA") == "hello world")
def testMultipleMatches(self):
"""Should return True if there are multiple occurances of substring."""
self.assert_(mox.StrContains("abc") == "ababcabcabcababc")
class RegexTest(unittest.TestCase):
"""Test Regex correctly matches regular expressions."""
def testIdentifyBadSyntaxDuringInit(self):
"""The user should know immediately if a regex has bad syntax."""
self.assertRaises(re.error, mox.Regex, '(a|b')
def testPatternInMiddle(self):
"""Should return True if the pattern matches at the middle of the string.
This ensures that re.search is used (instead of re.find).
"""
self.assert_(mox.Regex(r"a\s+b") == "x y z a b c")
def testNonMatchPattern(self):
"""Should return False if the pattern does not match the string."""
self.failIf(mox.Regex(r"a\s+b") == "x y z")
def testFlagsPassedCorrectly(self):
"""Should return True as we pass IGNORECASE flag."""
self.assert_(mox.Regex(r"A", re.IGNORECASE) == "a")
def testReprWithoutFlags(self):
"""repr should return the regular expression pattern."""
self.assert_(repr(mox.Regex(r"a\s+b")) == "<regular expression 'a\s+b'>")
def testReprWithFlags(self):
"""repr should return the regular expression pattern and flags."""
self.assert_(repr(mox.Regex(r"a\s+b", flags=4)) ==
"<regular expression 'a\s+b', flags=4>")
class IsATest(unittest.TestCase):
"""Verify IsA correctly checks equality based upon class type, not value."""
def testEqualityValid(self):
"""Verify that == correctly identifies objects of the same type."""
self.assert_(mox.IsA(str) == 'test')
def testEqualityInvalid(self):
"""Verify that == correctly identifies objects of different types."""
self.failIf(mox.IsA(str) == 10)
def testInequalityValid(self):
"""Verify that != identifies objects of different type."""
self.assert_(mox.IsA(str) != 10)
def testInequalityInvalid(self):
"""Verify that != correctly identifies objects of the same type."""
self.failIf(mox.IsA(str) != "test")
def testEqualityInListValid(self):
"""Verify list contents are properly compared."""
isa_list = [mox.IsA(str), mox.IsA(str)]
str_list = ["abc", "def"]
self.assert_(isa_list == str_list)
def testEquailtyInListInvalid(self):
"""Verify list contents are properly compared."""
isa_list = [mox.IsA(str),mox.IsA(str)]
mixed_list = ["abc", 123]
self.failIf(isa_list == mixed_list)
def testSpecialTypes(self):
"""Verify that IsA can handle objects like cStringIO.StringIO."""
isA = mox.IsA(cStringIO.StringIO())
stringIO = cStringIO.StringIO()
self.assert_(isA == stringIO)
class IsAlmostTest(unittest.TestCase):
"""Verify IsAlmost correctly checks equality of floating point numbers."""
def testEqualityValid(self):
"""Verify that == correctly identifies nearly equivalent floats."""
self.assertEquals(mox.IsAlmost(1.8999999999), 1.9)
def testEqualityInvalid(self):
"""Verify that == correctly identifies non-equivalent floats."""
self.assertNotEquals(mox.IsAlmost(1.899), 1.9)
def testEqualityWithPlaces(self):
"""Verify that specifying places has the desired effect."""
self.assertNotEquals(mox.IsAlmost(1.899), 1.9)
self.assertEquals(mox.IsAlmost(1.899, places=2), 1.9)
def testNonNumericTypes(self):
"""Verify that IsAlmost handles non-numeric types properly."""
self.assertNotEquals(mox.IsAlmost(1.8999999999), '1.9')
self.assertNotEquals(mox.IsAlmost('1.8999999999'), 1.9)
self.assertNotEquals(mox.IsAlmost('1.8999999999'), '1.9')
class MockMethodTest(unittest.TestCase):
"""Test class to verify that the MockMethod class is working correctly."""
def setUp(self):
self.expected_method = mox.MockMethod("testMethod", [], False)(['original'])
self.mock_method = mox.MockMethod("testMethod", [self.expected_method],
True)
def testAndReturnNoneByDefault(self):
"""Should return None by default."""
return_value = self.mock_method(['original'])
self.assert_(return_value == None)
def testAndReturnValue(self):
"""Should return a specificed return value."""
expected_return_value = "test"
self.expected_method.AndReturn(expected_return_value)
return_value = self.mock_method(['original'])
self.assert_(return_value == expected_return_value)
def testAndRaiseException(self):
"""Should raise a specified exception."""
expected_exception = Exception('test exception')
self.expected_method.AndRaise(expected_exception)
self.assertRaises(Exception, self.mock_method)
def testWithSideEffects(self):
"""Should call state modifier."""
local_list = ['original']
def modifier(mutable_list):
self.assertTrue(local_list is mutable_list)
mutable_list[0] = 'mutation'
self.expected_method.WithSideEffects(modifier).AndReturn(1)
self.mock_method(local_list)
self.assertEquals('mutation', local_list[0])
def testEqualityNoParamsEqual(self):
"""Methods with the same name and without params should be equal."""
expected_method = mox.MockMethod("testMethod", [], False)
self.assertEqual(self.mock_method, expected_method)
def testEqualityNoParamsNotEqual(self):
"""Methods with different names and without params should not be equal."""
expected_method = mox.MockMethod("otherMethod", [], False)
self.failIfEqual(self.mock_method, expected_method)
def testEqualityParamsEqual(self):
"""Methods with the same name and parameters should be equal."""
params = [1, 2, 3]
expected_method = mox.MockMethod("testMethod", [], False)
expected_method._params = params
self.mock_method._params = params
self.assertEqual(self.mock_method, expected_method)
def testEqualityParamsNotEqual(self):
"""Methods with the same name and different params should not be equal."""
expected_method = mox.MockMethod("testMethod", [], False)
expected_method._params = [1, 2, 3]
self.mock_method._params = ['a', 'b', 'c']
self.failIfEqual(self.mock_method, expected_method)
def testEqualityNamedParamsEqual(self):
"""Methods with the same name and same named params should be equal."""
named_params = {"input1": "test", "input2": "params"}
expected_method = mox.MockMethod("testMethod", [], False)
expected_method._named_params = named_params
self.mock_method._named_params = named_params
self.assertEqual(self.mock_method, expected_method)
def testEqualityNamedParamsNotEqual(self):
"""Methods with the same name and diffnamed params should not be equal."""
expected_method = mox.MockMethod("testMethod", [], False)
expected_method._named_params = {"input1": "test", "input2": "params"}
self.mock_method._named_params = {"input1": "test2", "input2": "params2"}
self.failIfEqual(self.mock_method, expected_method)
def testEqualityWrongType(self):
"""Method should not be equal to an object of a different type."""
self.failIfEqual(self.mock_method, "string?")
def testObjectEquality(self):
"""Equality of objects should work without a Comparator"""
instA = TestClass();
instB = TestClass();
params = [instA, ]
expected_method = mox.MockMethod("testMethod", [], False)
expected_method._params = params
self.mock_method._params = [instB, ]
self.assertEqual(self.mock_method, expected_method)
def testStrConversion(self):
method = mox.MockMethod("f", [], False)
method(1, 2, "st", n1=8, n2="st2")
self.assertEqual(str(method), ("f(1, 2, 'st', n1=8, n2='st2') -> None"))
method = mox.MockMethod("testMethod", [], False)
method(1, 2, "only positional")
self.assertEqual(str(method), "testMethod(1, 2, 'only positional') -> None")
method = mox.MockMethod("testMethod", [], False)
method(a=1, b=2, c="only named")
self.assertEqual(str(method),
"testMethod(a=1, b=2, c='only named') -> None")
method = mox.MockMethod("testMethod", [], False)
method()
self.assertEqual(str(method), "testMethod() -> None")
method = mox.MockMethod("testMethod", [], False)
method(x="only 1 parameter")
self.assertEqual(str(method), "testMethod(x='only 1 parameter') -> None")
method = mox.MockMethod("testMethod", [], False)
method().AndReturn('return_value')
self.assertEqual(str(method), "testMethod() -> 'return_value'")
method = mox.MockMethod("testMethod", [], False)
method().AndReturn(('a', {1: 2}))
self.assertEqual(str(method), "testMethod() -> ('a', {1: 2})")
class MockAnythingTest(unittest.TestCase):
"""Verify that the MockAnything class works as expected."""
def setUp(self):
self.mock_object = mox.MockAnything()
def testRepr(self):
"""Calling repr on a MockAnything instance must work."""
self.assertEqual('<MockAnything instance>', repr(self.mock_object))
def testSetupMode(self):
"""Verify the mock will accept any call."""
self.mock_object.NonsenseCall()
self.assert_(len(self.mock_object._expected_calls_queue) == 1)
def testReplayWithExpectedCall(self):
"""Verify the mock replays method calls as expected."""
self.mock_object.ValidCall() # setup method call
self.mock_object._Replay() # start replay mode
self.mock_object.ValidCall() # make method call
def testReplayWithUnexpectedCall(self):
"""Unexpected method calls should raise UnexpectedMethodCallError."""
self.mock_object.ValidCall() # setup method call
self.mock_object._Replay() # start replay mode
self.assertRaises(mox.UnexpectedMethodCallError,
self.mock_object.OtherValidCall)
def testVerifyWithCompleteReplay(self):
"""Verify should not raise an exception for a valid replay."""
self.mock_object.ValidCall() # setup method call
self.mock_object._Replay() # start replay mode
self.mock_object.ValidCall() # make method call
self.mock_object._Verify()
def testVerifyWithIncompleteReplay(self):
"""Verify should raise an exception if the replay was not complete."""
self.mock_object.ValidCall() # setup method call
self.mock_object._Replay() # start replay mode
# ValidCall() is never made
self.assertRaises(mox.ExpectedMethodCallsError, self.mock_object._Verify)
def testSpecialClassMethod(self):
"""Verify should not raise an exception when special methods are used."""
self.mock_object[1].AndReturn(True)
self.mock_object._Replay()
returned_val = self.mock_object[1]
self.assert_(returned_val)
self.mock_object._Verify()
def testNonzero(self):
"""You should be able to use the mock object in an if."""
self.mock_object._Replay()
if self.mock_object:
pass
def testNotNone(self):
"""Mock should be comparable to None."""
self.mock_object._Replay()
if self.mock_object is not None:
pass
if self.mock_object is None:
pass
def testEquals(self):
"""A mock should be able to compare itself to another object."""
self.mock_object._Replay()
self.assertEquals(self.mock_object, self.mock_object)
def testEqualsMockFailure(self):
"""Verify equals identifies unequal objects."""
self.mock_object.SillyCall()
self.mock_object._Replay()
self.assertNotEquals(self.mock_object, mox.MockAnything())
def testEqualsInstanceFailure(self):
"""Verify equals identifies that objects are different instances."""
self.mock_object._Replay()
self.assertNotEquals(self.mock_object, TestClass())
def testNotEquals(self):
"""Verify not equals works."""
self.mock_object._Replay()
self.assertFalse(self.mock_object != self.mock_object)
def testNestedMockCallsRecordedSerially(self):
"""Test that nested calls work when recorded serially."""
self.mock_object.CallInner().AndReturn(1)
self.mock_object.CallOuter(1)
self.mock_object._Replay()
self.mock_object.CallOuter(self.mock_object.CallInner())
self.mock_object._Verify()
def testNestedMockCallsRecordedNested(self):
"""Test that nested cals work when recorded in a nested fashion."""
self.mock_object.CallOuter(self.mock_object.CallInner().AndReturn(1))
self.mock_object._Replay()
self.mock_object.CallOuter(self.mock_object.CallInner())
self.mock_object._Verify()
def testIsCallable(self):
"""Test that MockAnything can even mock a simple callable.
This is handy for "stubbing out" a method in a module with a mock, and
verifying that it was called.
"""
self.mock_object().AndReturn('mox0rd')
self.mock_object._Replay()
self.assertEquals('mox0rd', self.mock_object())
self.mock_object._Verify()
def testIsReprable(self):
"""Test that MockAnythings can be repr'd without causing a failure."""
self.failUnless('MockAnything' in repr(self.mock_object))
class MethodCheckerTest(unittest.TestCase):
"""Tests MockMethod's use of MethodChecker method."""
def testNoParameters(self):
method = mox.MockMethod('NoParameters', [], False,
CheckCallTestClass.NoParameters)
method()
self.assertRaises(AttributeError, method, 1)
self.assertRaises(AttributeError, method, 1, 2)
self.assertRaises(AttributeError, method, a=1)
self.assertRaises(AttributeError, method, 1, b=2)
def testOneParameter(self):
method = mox.MockMethod('OneParameter', [], False,
CheckCallTestClass.OneParameter)
self.assertRaises(AttributeError, method)
method(1)
method(a=1)
self.assertRaises(AttributeError, method, b=1)
self.assertRaises(AttributeError, method, 1, 2)
self.assertRaises(AttributeError, method, 1, a=2)
self.assertRaises(AttributeError, method, 1, b=2)
def testTwoParameters(self):
method = mox.MockMethod('TwoParameters', [], False,
CheckCallTestClass.TwoParameters)
self.assertRaises(AttributeError, method)
self.assertRaises(AttributeError, method, 1)
self.assertRaises(AttributeError, method, a=1)
self.assertRaises(AttributeError, method, b=1)
method(1, 2)
method(1, b=2)
method(a=1, b=2)
method(b=2, a=1)
self.assertRaises(AttributeError, method, b=2, c=3)
self.assertRaises(AttributeError, method, a=1, b=2, c=3)
self.assertRaises(AttributeError, method, 1, 2, 3)
self.assertRaises(AttributeError, method, 1, 2, 3, 4)
self.assertRaises(AttributeError, method, 3, a=1, b=2)
def testOneDefaultValue(self):
method = mox.MockMethod('OneDefaultValue', [], False,
CheckCallTestClass.OneDefaultValue)
method()
method(1)
method(a=1)
self.assertRaises(AttributeError, method, b=1)
self.assertRaises(AttributeError, method, 1, 2)
self.assertRaises(AttributeError, method, 1, a=2)
self.assertRaises(AttributeError, method, 1, b=2)
def testTwoDefaultValues(self):
method = mox.MockMethod('TwoDefaultValues', [], False,
CheckCallTestClass.TwoDefaultValues)
self.assertRaises(AttributeError, method)
self.assertRaises(AttributeError, method, c=3)
self.assertRaises(AttributeError, method, 1)
self.assertRaises(AttributeError, method, 1, d=4)
self.assertRaises(AttributeError, method, 1, d=4, c=3)
method(1, 2)
method(a=1, b=2)
method(1, 2, 3)
method(1, 2, 3, 4)
method(1, 2, c=3)
method(1, 2, c=3, d=4)
method(1, 2, d=4, c=3)
method(d=4, c=3, a=1, b=2)
self.assertRaises(AttributeError, method, 1, 2, 3, 4, 5)
self.assertRaises(AttributeError, method, 1, 2, e=9)
self.assertRaises(AttributeError, method, a=1, b=2, e=9)
def testArgs(self):
method = mox.MockMethod('Args', [], False, CheckCallTestClass.Args)
self.assertRaises(AttributeError, method)
self.assertRaises(AttributeError, method, 1)
method(1, 2)
method(a=1, b=2)
method(1, 2, 3)
method(1, 2, 3, 4)
self.assertRaises(AttributeError, method, 1, 2, a=3)
self.assertRaises(AttributeError, method, 1, 2, c=3)
def testKwargs(self):
method = mox.MockMethod('Kwargs', [], False, CheckCallTestClass.Kwargs)
self.assertRaises(AttributeError, method)
method(1)
method(1, 2)
method(a=1, b=2)
method(b=2, a=1)
self.assertRaises(AttributeError, method, 1, 2, 3)
self.assertRaises(AttributeError, method, 1, 2, a=3)
method(1, 2, c=3)
method(a=1, b=2, c=3)
method(c=3, a=1, b=2)
method(a=1, b=2, c=3, d=4)
self.assertRaises(AttributeError, method, 1, 2, 3, 4)
def testArgsAndKwargs(self):
method = mox.MockMethod('ArgsAndKwargs', [], False,
CheckCallTestClass.ArgsAndKwargs)
self.assertRaises(AttributeError, method)
method(1)
method(1, 2)
method(1, 2, 3)
method(a=1)
method(1, b=2)
self.assertRaises(AttributeError, method, 1, a=2)
method(b=2, a=1)
method(c=3, b=2, a=1)
method(1, 2, c=3)
class CheckCallTestClass(object):
def NoParameters(self):
pass
def OneParameter(self, a):
pass
def TwoParameters(self, a, b):
pass
def OneDefaultValue(self, a=1):
pass
def TwoDefaultValues(self, a, b, c=1, d=2):
pass
def Args(self, a, b, *args):
pass
def Kwargs(self, a, b=2, **kwargs):
pass
def ArgsAndKwargs(self, a, *args, **kwargs):
pass
class MockObjectTest(unittest.TestCase):
"""Verify that the MockObject class works as exepcted."""
def setUp(self):
self.mock_object = mox.MockObject(TestClass)
def testSetupModeWithValidCall(self):
"""Verify the mock object properly mocks a basic method call."""
self.mock_object.ValidCall()
self.assert_(len(self.mock_object._expected_calls_queue) == 1)
def testSetupModeWithInvalidCall(self):
"""UnknownMethodCallError should be raised if a non-member method is called.
"""
# Note: assertRaises does not catch exceptions thrown by MockObject's
# __getattr__
try:
self.mock_object.InvalidCall()
self.fail("No exception thrown, expected UnknownMethodCallError")
except mox.UnknownMethodCallError:
pass
except Exception:
self.fail("Wrong exception type thrown, expected UnknownMethodCallError")
def testReplayWithInvalidCall(self):
"""UnknownMethodCallError should be raised if a non-member method is called.
"""
self.mock_object.ValidCall() # setup method call
self.mock_object._Replay() # start replay mode
# Note: assertRaises does not catch exceptions thrown by MockObject's
# __getattr__
try:
self.mock_object.InvalidCall()
self.fail("No exception thrown, expected UnknownMethodCallError")
except mox.UnknownMethodCallError:
pass
except Exception:
self.fail("Wrong exception type thrown, expected UnknownMethodCallError")
def testIsInstance(self):
"""Mock should be able to pass as an instance of the mocked class."""
self.assert_(isinstance(self.mock_object, TestClass))
def testFindValidMethods(self):
"""Mock should be able to mock all public methods."""
self.assert_('ValidCall' in self.mock_object._known_methods)
self.assert_('OtherValidCall' in self.mock_object._known_methods)
self.assert_('MyClassMethod' in self.mock_object._known_methods)
self.assert_('MyStaticMethod' in self.mock_object._known_methods)
self.assert_('_ProtectedCall' in self.mock_object._known_methods)
self.assert_('__PrivateCall' not in self.mock_object._known_methods)
self.assert_('_TestClass__PrivateCall' in self.mock_object._known_methods)
def testFindsSuperclassMethods(self):
"""Mock should be able to mock superclasses methods."""
self.mock_object = mox.MockObject(ChildClass)
self.assert_('ValidCall' in self.mock_object._known_methods)
self.assert_('OtherValidCall' in self.mock_object._known_methods)
self.assert_('MyClassMethod' in self.mock_object._known_methods)
self.assert_('ChildValidCall' in self.mock_object._known_methods)
def testAccessClassVariables(self):
"""Class variables should be accessible through the mock."""
self.assert_('SOME_CLASS_VAR' in self.mock_object._known_vars)
self.assert_('_PROTECTED_CLASS_VAR' in self.mock_object._known_vars)
self.assertEquals('test_value', self.mock_object.SOME_CLASS_VAR)
def testEquals(self):
"""A mock should be able to compare itself to another object."""
self.mock_object._Replay()
self.assertEquals(self.mock_object, self.mock_object)
def testEqualsMockFailure(self):
"""Verify equals identifies unequal objects."""
self.mock_object.ValidCall()
self.mock_object._Replay()
self.assertNotEquals(self.mock_object, mox.MockObject(TestClass))
def testEqualsInstanceFailure(self):
"""Verify equals identifies that objects are different instances."""
self.mock_object._Replay()
self.assertNotEquals(self.mock_object, TestClass())
def testNotEquals(self):
"""Verify not equals works."""
self.mock_object._Replay()
self.assertFalse(self.mock_object != self.mock_object)
def testMockSetItem_ExpectedSetItem_Success(self):
"""Test that __setitem__() gets mocked in Dummy.
In this test, _Verify() succeeds.
"""
dummy = mox.MockObject(TestClass)
dummy['X'] = 'Y'
dummy._Replay()
dummy['X'] = 'Y'
dummy._Verify()
def testMockSetItem_ExpectedSetItem_NoSuccess(self):
"""Test that __setitem__() gets mocked in Dummy.
In this test, _Verify() fails.
"""
dummy = mox.MockObject(TestClass)
dummy['X'] = 'Y'
dummy._Replay()
# NOT doing dummy['X'] = 'Y'
self.assertRaises(mox.ExpectedMethodCallsError, dummy._Verify)
def testMockSetItem_ExpectedNoSetItem_Success(self):
"""Test that __setitem__() gets mocked in Dummy."""
dummy = mox.MockObject(TestClass)
# NOT doing dummy['X'] = 'Y'
dummy._Replay()
def call(): dummy['X'] = 'Y'
self.assertRaises(mox.UnexpectedMethodCallError, call)
def testMockSetItem_ExpectedNoSetItem_NoSuccess(self):
"""Test that __setitem__() gets mocked in Dummy.
In this test, _Verify() fails.
"""
dummy = mox.MockObject(TestClass)
# NOT doing dummy['X'] = 'Y'
dummy._Replay()
# NOT doing dummy['X'] = 'Y'
dummy._Verify()
def testMockSetItem_ExpectedSetItem_NonmatchingParameters(self):
"""Test that __setitem__() fails if other parameters are expected."""
dummy = mox.MockObject(TestClass)
dummy['X'] = 'Y'
dummy._Replay()
def call(): dummy['wrong'] = 'Y'
self.assertRaises(mox.UnexpectedMethodCallError, call)
dummy._Verify()
def testMockSetItem_WithSubClassOfNewStyleClass(self):
class NewStyleTestClass(object):
def __init__(self):
self.my_dict = {}
def __setitem__(self, key, value):
self.my_dict[key], value
class TestSubClass(NewStyleTestClass):
pass
dummy = mox.MockObject(TestSubClass)
dummy[1] = 2
dummy._Replay()
dummy[1] = 2
dummy._Verify()
def testMockGetItem_ExpectedGetItem_Success(self):
"""Test that __getitem__() gets mocked in Dummy.
In this test, _Verify() succeeds.
"""
dummy = mox.MockObject(TestClass)
dummy['X'].AndReturn('value')
dummy._Replay()
self.assertEqual(dummy['X'], 'value')
dummy._Verify()
def testMockGetItem_ExpectedGetItem_NoSuccess(self):
"""Test that __getitem__() gets mocked in Dummy.
In this test, _Verify() fails.
"""
dummy = mox.MockObject(TestClass)
dummy['X'].AndReturn('value')
dummy._Replay()
# NOT doing dummy['X']
self.assertRaises(mox.ExpectedMethodCallsError, dummy._Verify)
def testMockGetItem_ExpectedNoGetItem_NoSuccess(self):
"""Test that __getitem__() gets mocked in Dummy."""
dummy = mox.MockObject(TestClass)
# NOT doing dummy['X']
dummy._Replay()
def call(): return dummy['X']
self.assertRaises(mox.UnexpectedMethodCallError, call)
def testMockGetItem_ExpectedGetItem_NonmatchingParameters(self):
"""Test that __getitem__() fails if other parameters are expected."""
dummy = mox.MockObject(TestClass)
dummy['X'].AndReturn('value')
dummy._Replay()
def call(): return dummy['wrong']
self.assertRaises(mox.UnexpectedMethodCallError, call)
dummy._Verify()
def testMockGetItem_WithSubClassOfNewStyleClass(self):
class NewStyleTestClass(object):
def __getitem__(self, key):
return {1: '1', 2: '2'}[key]
class TestSubClass(NewStyleTestClass):
pass
dummy = mox.MockObject(TestSubClass)
dummy[1].AndReturn('3')
dummy._Replay()
self.assertEquals('3', dummy.__getitem__(1))
dummy._Verify()
def testMockIter_ExpectedIter_Success(self):
"""Test that __iter__() gets mocked in Dummy.
In this test, _Verify() succeeds.
"""
dummy = mox.MockObject(TestClass)
iter(dummy).AndReturn(iter(['X', 'Y']))
dummy._Replay()
self.assertEqual([x for x in dummy], ['X', 'Y'])
dummy._Verify()
def testMockContains_ExpectedContains_Success(self):
"""Test that __contains__ gets mocked in Dummy.
In this test, _Verify() succeeds.
"""
dummy = mox.MockObject(TestClass)
dummy.__contains__('X').AndReturn(True)
dummy._Replay()
self.failUnless('X' in dummy)
dummy._Verify()
def testMockContains_ExpectedContains_NoSuccess(self):
"""Test that __contains__() gets mocked in Dummy.
In this test, _Verify() fails.
"""
dummy = mox.MockObject(TestClass)
dummy.__contains__('X').AndReturn('True')
dummy._Replay()
# NOT doing 'X' in dummy
self.assertRaises(mox.ExpectedMethodCallsError, dummy._Verify)
def testMockContains_ExpectedContains_NonmatchingParameter(self):
"""Test that __contains__ fails if other parameters are expected."""
dummy = mox.MockObject(TestClass)
dummy.__contains__('X').AndReturn(True)
dummy._Replay()
def call(): return 'Y' in dummy
self.assertRaises(mox.UnexpectedMethodCallError, call)
dummy._Verify()
def testMockIter_ExpectedIter_NoSuccess(self):
"""Test that __iter__() gets mocked in Dummy.
In this test, _Verify() fails.
"""
dummy = mox.MockObject(TestClass)
iter(dummy).AndReturn(iter(['X', 'Y']))
dummy._Replay()
# NOT doing self.assertEqual([x for x in dummy], ['X', 'Y'])
self.assertRaises(mox.ExpectedMethodCallsError, dummy._Verify)
def testMockIter_ExpectedNoIter_NoSuccess(self):
"""Test that __iter__() gets mocked in Dummy."""
dummy = mox.MockObject(TestClass)
# NOT doing iter(dummy)
dummy._Replay()
def call(): return [x for x in dummy]
self.assertRaises(mox.UnexpectedMethodCallError, call)
def testMockIter_ExpectedGetItem_Success(self):
"""Test that __iter__() gets mocked in Dummy using getitem."""
dummy = mox.MockObject(SubscribtableNonIterableClass)
dummy[0].AndReturn('a')
dummy[1].AndReturn('b')
dummy[2].AndRaise(IndexError)
dummy._Replay()
self.assertEquals(['a', 'b'], [x for x in dummy])
dummy._Verify()
def testMockIter_ExpectedNoGetItem_NoSuccess(self):
"""Test that __iter__() gets mocked in Dummy using getitem."""
dummy = mox.MockObject(SubscribtableNonIterableClass)
# NOT doing dummy[index]
dummy._Replay()
function = lambda: [x for x in dummy]
self.assertRaises(mox.UnexpectedMethodCallError, function)
def testMockGetIter_WithSubClassOfNewStyleClass(self):
class NewStyleTestClass(object):
def __iter__(self):
return iter([1, 2, 3])
class TestSubClass(NewStyleTestClass):
pass
dummy = mox.MockObject(TestSubClass)
iter(dummy).AndReturn(iter(['a', 'b']))
dummy._Replay()
self.assertEquals(['a', 'b'], [x for x in dummy])
dummy._Verify()
class MoxTest(unittest.TestCase):
"""Verify Mox works correctly."""
def setUp(self):
self.mox = mox.Mox()
def testCreateObject(self):
"""Mox should create a mock object."""
mock_obj = self.mox.CreateMock(TestClass)
def testVerifyObjectWithCompleteReplay(self):
"""Mox should replay and verify all objects it created."""
mock_obj = self.mox.CreateMock(TestClass)
mock_obj.ValidCall()
mock_obj.ValidCallWithArgs(mox.IsA(TestClass))
self.mox.ReplayAll()
mock_obj.ValidCall()
mock_obj.ValidCallWithArgs(TestClass("some_value"))
self.mox.VerifyAll()
def testVerifyObjectWithIncompleteReplay(self):
"""Mox should raise an exception if a mock didn't replay completely."""
mock_obj = self.mox.CreateMock(TestClass)
mock_obj.ValidCall()
self.mox.ReplayAll()
# ValidCall() is never made
self.assertRaises(mox.ExpectedMethodCallsError, self.mox.VerifyAll)
def testEntireWorkflow(self):
"""Test the whole work flow."""
mock_obj = self.mox.CreateMock(TestClass)
mock_obj.ValidCall().AndReturn("yes")
self.mox.ReplayAll()
ret_val = mock_obj.ValidCall()
self.assertEquals("yes", ret_val)
self.mox.VerifyAll()
def testCallableObject(self):
"""Test recording calls to a callable object works."""
mock_obj = self.mox.CreateMock(CallableClass)
mock_obj("foo").AndReturn("qux")
self.mox.ReplayAll()
ret_val = mock_obj("foo")
self.assertEquals("qux", ret_val)
self.mox.VerifyAll()
def testInheritedCallableObject(self):
"""Test recording calls to an object inheriting from a callable object."""
mock_obj = self.mox.CreateMock(InheritsFromCallable)
mock_obj("foo").AndReturn("qux")
self.mox.ReplayAll()
ret_val = mock_obj("foo")
self.assertEquals("qux", ret_val)
self.mox.VerifyAll()
def testCallOnNonCallableObject(self):
"""Test that you cannot call a non-callable object."""
mock_obj = self.mox.CreateMock(TestClass)
self.assertRaises(TypeError, mock_obj)
def testCallableObjectWithBadCall(self):
"""Test verifying calls to a callable object works."""
mock_obj = self.mox.CreateMock(CallableClass)
mock_obj("foo").AndReturn("qux")
self.mox.ReplayAll()
self.assertRaises(mox.UnexpectedMethodCallError, mock_obj, "ZOOBAZ")
def testUnorderedGroup(self):
"""Test that using one unordered group works."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Method(1).InAnyOrder()
mock_obj.Method(2).InAnyOrder()
self.mox.ReplayAll()
mock_obj.Method(2)
mock_obj.Method(1)
self.mox.VerifyAll()
def testUnorderedGroupsInline(self):
"""Unordered groups should work in the context of ordered calls."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(1).InAnyOrder()
mock_obj.Method(2).InAnyOrder()
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
mock_obj.Method(2)
mock_obj.Method(1)
mock_obj.Close()
self.mox.VerifyAll()
def testMultipleUnorderdGroups(self):
"""Multiple unoreded groups should work."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Method(1).InAnyOrder()
mock_obj.Method(2).InAnyOrder()
mock_obj.Foo().InAnyOrder('group2')
mock_obj.Bar().InAnyOrder('group2')
self.mox.ReplayAll()
mock_obj.Method(2)
mock_obj.Method(1)
mock_obj.Bar()
mock_obj.Foo()
self.mox.VerifyAll()
def testMultipleUnorderdGroupsOutOfOrder(self):
"""Multiple unordered groups should maintain external order"""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Method(1).InAnyOrder()
mock_obj.Method(2).InAnyOrder()
mock_obj.Foo().InAnyOrder('group2')
mock_obj.Bar().InAnyOrder('group2')
self.mox.ReplayAll()
mock_obj.Method(2)
self.assertRaises(mox.UnexpectedMethodCallError, mock_obj.Bar)
def testUnorderedGroupWithReturnValue(self):
"""Unordered groups should work with return values."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(1).InAnyOrder().AndReturn(9)
mock_obj.Method(2).InAnyOrder().AndReturn(10)
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
actual_two = mock_obj.Method(2)
actual_one = mock_obj.Method(1)
mock_obj.Close()
self.assertEquals(9, actual_one)
self.assertEquals(10, actual_two)
self.mox.VerifyAll()
def testUnorderedGroupWithComparator(self):
"""Unordered groups should work with comparators"""
def VerifyOne(cmd):
if not isinstance(cmd, str):
self.fail('Unexpected type passed to comparator: ' + str(cmd))
return cmd == 'test'
def VerifyTwo(cmd):
return True
mock_obj = self.mox.CreateMockAnything()
mock_obj.Foo(['test'], mox.Func(VerifyOne), bar=1).InAnyOrder().\
AndReturn('yes test')
mock_obj.Foo(['test'], mox.Func(VerifyTwo), bar=1).InAnyOrder().\
AndReturn('anything')
self.mox.ReplayAll()
mock_obj.Foo(['test'], 'anything', bar=1)
mock_obj.Foo(['test'], 'test', bar=1)
self.mox.VerifyAll()
def testMultipleTimes(self):
"""Test if MultipleTimesGroup works."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Method(1).MultipleTimes().AndReturn(9)
mock_obj.Method(2).AndReturn(10)
mock_obj.Method(3).MultipleTimes().AndReturn(42)
self.mox.ReplayAll()
actual_one = mock_obj.Method(1)
second_one = mock_obj.Method(1) # This tests MultipleTimes.
actual_two = mock_obj.Method(2)
actual_three = mock_obj.Method(3)
mock_obj.Method(3)
mock_obj.Method(3)
self.mox.VerifyAll()
self.assertEquals(9, actual_one)
self.assertEquals(9, second_one) # Repeated calls should return same number.
self.assertEquals(10, actual_two)
self.assertEquals(42, actual_three)
def testMultipleTimesUsingIsAParameter(self):
"""Test if MultipleTimesGroup works with a IsA parameter."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(mox.IsA(str)).MultipleTimes("IsA").AndReturn(9)
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
actual_one = mock_obj.Method("1")
second_one = mock_obj.Method("2") # This tests MultipleTimes.
mock_obj.Close()
self.mox.VerifyAll()
self.assertEquals(9, actual_one)
self.assertEquals(9, second_one) # Repeated calls should return same number.
def testMutlipleTimesUsingFunc(self):
"""Test that the Func is not evaluated more times than necessary.
If a Func() has side effects, it can cause a passing test to fail.
"""
self.counter = 0
def MyFunc(actual_str):
"""Increment the counter if actual_str == 'foo'."""
if actual_str == 'foo':
self.counter += 1
return True
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(mox.Func(MyFunc)).MultipleTimes()
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
mock_obj.Method('foo')
mock_obj.Method('foo')
mock_obj.Method('not-foo')
mock_obj.Close()
self.mox.VerifyAll()
self.assertEquals(2, self.counter)
def testMultipleTimesThreeMethods(self):
"""Test if MultipleTimesGroup works with three or more methods."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(1).MultipleTimes().AndReturn(9)
mock_obj.Method(2).MultipleTimes().AndReturn(8)
mock_obj.Method(3).MultipleTimes().AndReturn(7)
mock_obj.Method(4).AndReturn(10)
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
actual_three = mock_obj.Method(3)
mock_obj.Method(1)
actual_two = mock_obj.Method(2)
mock_obj.Method(3)
actual_one = mock_obj.Method(1)
actual_four = mock_obj.Method(4)
mock_obj.Close()
self.assertEquals(9, actual_one)
self.assertEquals(8, actual_two)
self.assertEquals(7, actual_three)
self.assertEquals(10, actual_four)
self.mox.VerifyAll()
def testMultipleTimesMissingOne(self):
"""Test if MultipleTimesGroup fails if one method is missing."""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(1).MultipleTimes().AndReturn(9)
mock_obj.Method(2).MultipleTimes().AndReturn(8)
mock_obj.Method(3).MultipleTimes().AndReturn(7)
mock_obj.Method(4).AndReturn(10)
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
mock_obj.Method(3)
mock_obj.Method(2)
mock_obj.Method(3)
mock_obj.Method(3)
mock_obj.Method(2)
self.assertRaises(mox.UnexpectedMethodCallError, mock_obj.Method, 4)
def testMultipleTimesTwoGroups(self):
"""Test if MultipleTimesGroup works with a group after a
MultipleTimesGroup.
"""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(1).MultipleTimes().AndReturn(9)
mock_obj.Method(3).MultipleTimes("nr2").AndReturn(42)
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
actual_one = mock_obj.Method(1)
mock_obj.Method(1)
actual_three = mock_obj.Method(3)
mock_obj.Method(3)
mock_obj.Close()
self.assertEquals(9, actual_one)
self.assertEquals(42, actual_three)
self.mox.VerifyAll()
def testMultipleTimesTwoGroupsFailure(self):
"""Test if MultipleTimesGroup fails with a group after a
MultipleTimesGroup.
"""
mock_obj = self.mox.CreateMockAnything()
mock_obj.Open()
mock_obj.Method(1).MultipleTimes().AndReturn(9)
mock_obj.Method(3).MultipleTimes("nr2").AndReturn(42)
mock_obj.Close()
self.mox.ReplayAll()
mock_obj.Open()
actual_one = mock_obj.Method(1)
mock_obj.Method(1)
actual_three = mock_obj.Method(3)
self.assertRaises(mox.UnexpectedMethodCallError, mock_obj.Method, 1)
def testWithSideEffects(self):
"""Test side effect operations actually modify their target objects."""
def modifier(mutable_list):
mutable_list[0] = 'mutated'
mock_obj = self.mox.CreateMockAnything()
mock_obj.ConfigureInOutParameter(['original']).WithSideEffects(modifier)
mock_obj.WorkWithParameter(['mutated'])
self.mox.ReplayAll()
local_list = ['original']
mock_obj.ConfigureInOutParameter(local_list)
mock_obj.WorkWithParameter(local_list)
self.mox.VerifyAll()
def testWithSideEffectsException(self):
"""Test side effect operations actually modify their target objects."""
def modifier(mutable_list):
mutable_list[0] = 'mutated'
mock_obj = self.mox.CreateMockAnything()
method = mock_obj.ConfigureInOutParameter(['original'])
method.WithSideEffects(modifier).AndRaise(Exception('exception'))
mock_obj.WorkWithParameter(['mutated'])
self.mox.ReplayAll()
local_list = ['original']
self.failUnlessRaises(Exception,
mock_obj.ConfigureInOutParameter,
local_list)
mock_obj.WorkWithParameter(local_list)
self.mox.VerifyAll()
def testStubOutMethod(self):
"""Test that a method is replaced with a MockAnything."""
test_obj = TestClass()
# Replace OtherValidCall with a mock.
self.mox.StubOutWithMock(test_obj, 'OtherValidCall')
self.assert_(isinstance(test_obj.OtherValidCall, mox.MockAnything))
test_obj.OtherValidCall().AndReturn('foo')
self.mox.ReplayAll()
actual = test_obj.OtherValidCall()
self.mox.VerifyAll()
self.mox.UnsetStubs()
self.assertEquals('foo', actual)
self.failIf(isinstance(test_obj.OtherValidCall, mox.MockAnything))
def testWarnsUserIfMockingMock(self):
"""Test that user is warned if they try to stub out a MockAnything."""
self.mox.StubOutWithMock(TestClass, 'MyStaticMethod')
self.assertRaises(TypeError, self.mox.StubOutWithMock, TestClass,
'MyStaticMethod')
def testStubOutObject(self):
"""Test than object is replaced with a Mock."""
class Foo(object):
def __init__(self):
self.obj = TestClass()
foo = Foo()
self.mox.StubOutWithMock(foo, "obj")
self.assert_(isinstance(foo.obj, mox.MockObject))
foo.obj.ValidCall()
self.mox.ReplayAll()
foo.obj.ValidCall()
self.mox.VerifyAll()
self.mox.UnsetStubs()
self.failIf(isinstance(foo.obj, mox.MockObject))
def testForgotReplayHelpfulMessage(self):
"""If there is an AttributeError on a MockMethod, give users a helpful msg.
"""
foo = self.mox.CreateMockAnything()
bar = self.mox.CreateMockAnything()
foo.GetBar().AndReturn(bar)
bar.ShowMeTheMoney()
# Forgot to replay!
try:
foo.GetBar().ShowMeTheMoney()
except AttributeError, e:
self.assertEquals('MockMethod has no attribute "ShowMeTheMoney". '
'Did you remember to put your mocks in replay mode?', str(e))
class ReplayTest(unittest.TestCase):
"""Verify Replay works properly."""
def testReplay(self):
"""Replay should put objects into replay mode."""
mock_obj = mox.MockObject(TestClass)
self.assertFalse(mock_obj._replay_mode)
mox.Replay(mock_obj)
self.assertTrue(mock_obj._replay_mode)
class MoxTestBaseTest(unittest.TestCase):
"""Verify that all tests in a class derived from MoxTestBase are wrapped."""
def setUp(self):
self.mox = mox.Mox()
self.test_mox = mox.Mox()
self.result = unittest.TestResult()
def tearDown(self):
# In case one of our tests fail before UnsetStubs is called.
self.mox.UnsetStubs()
self.test_mox.UnsetStubs()
def _setUpTestClass(self):
"""Replacement for setUp in the test class instance.
Assigns a mox.Mox instance as the mox attribute of the test class instance.
This replacement Mox instance is under our control before setUp is called
in the test class instance.
"""
self.test.mox = self.test_mox
def _CreateTest(self, test_name):
"""Create a test from our example mox class.
The created test instance is assigned to this instances test attribute.
"""
self.test = mox_test_helper.ExampleMoxTest(test_name)
self.mox.stubs.Set(self.test, 'setUp', self._setUpTestClass)
def _VerifySuccess(self):
"""Run the checks to confirm test method completed successfully."""
self.mox.StubOutWithMock(self.test_mox, 'UnsetStubs')
self.mox.StubOutWithMock(self.test_mox, 'VerifyAll')
self.test_mox.UnsetStubs()
self.test_mox.VerifyAll()
self.mox.ReplayAll()
self.test.run(result=self.result)
self.assertTrue(self.result.wasSuccessful())
self.mox.UnsetStubs()
self.mox.VerifyAll()
self.test_mox.UnsetStubs()
self.test_mox.VerifyAll()
def testSuccess(self):
"""Successful test method execution test."""
self._CreateTest('testSuccess')
self._VerifySuccess()
def testExpectedNotCalled(self):
"""Stubbed out method is not called."""
self._CreateTest('testExpectedNotCalled')
self.mox.StubOutWithMock(self.test_mox, 'UnsetStubs')
# Dont stub out VerifyAll - that's what causes the test to fail
self.test_mox.UnsetStubs()
self.test_mox.VerifyAll()
self.mox.ReplayAll()
self.test.run(result=self.result)
self.failIf(self.result.wasSuccessful())
self.mox.UnsetStubs()
self.mox.VerifyAll()
self.test_mox.UnsetStubs()
def testUnexpectedCall(self):
"""Stubbed out method is called with unexpected arguments."""
self._CreateTest('testUnexpectedCall')
self.mox.StubOutWithMock(self.test_mox, 'UnsetStubs')
# Ensure no calls are made to VerifyAll()
self.mox.StubOutWithMock(self.test_mox, 'VerifyAll')
self.test_mox.UnsetStubs()
self.mox.ReplayAll()
self.test.run(result=self.result)
self.failIf(self.result.wasSuccessful())
self.mox.UnsetStubs()
self.mox.VerifyAll()
self.test_mox.UnsetStubs()
def testFailure(self):
"""Failing assertion in test method."""
self._CreateTest('testFailure')
self.mox.StubOutWithMock(self.test_mox, 'UnsetStubs')
# Ensure no calls are made to VerifyAll()
self.mox.StubOutWithMock(self.test_mox, 'VerifyAll')
self.test_mox.UnsetStubs()
self.mox.ReplayAll()
self.test.run(result=self.result)
self.failIf(self.result.wasSuccessful())
self.mox.UnsetStubs()
self.mox.VerifyAll()
self.test_mox.UnsetStubs()
def testMixin(self):
"""Run test from mix-in test class, ensure it passes."""
self._CreateTest('testStat')
self._VerifySuccess()
def testMixinAgain(self):
"""Run same test as above but from the current test class.
This ensures metaclass properly wrapped test methods from all base classes.
If unsetting of stubs doesn't happen, this will fail.
"""
self._CreateTest('testStatOther')
self._VerifySuccess()
class VerifyTest(unittest.TestCase):
"""Verify Verify works properly."""
def testVerify(self):
"""Verify should be called for all objects.
This should throw an exception because the expected behavior did not occur.
"""
mock_obj = mox.MockObject(TestClass)
mock_obj.ValidCall()
mock_obj._Replay()
self.assertRaises(mox.ExpectedMethodCallsError, mox.Verify, mock_obj)
class ResetTest(unittest.TestCase):
"""Verify Reset works properly."""
def testReset(self):
"""Should empty all queues and put mocks in record mode."""
mock_obj = mox.MockObject(TestClass)
mock_obj.ValidCall()
self.assertFalse(mock_obj._replay_mode)
mock_obj._Replay()
self.assertTrue(mock_obj._replay_mode)
self.assertEquals(1, len(mock_obj._expected_calls_queue))
mox.Reset(mock_obj)
self.assertFalse(mock_obj._replay_mode)
self.assertEquals(0, len(mock_obj._expected_calls_queue))
class MyTestCase(unittest.TestCase):
"""Simulate the use of a fake wrapper around Python's unittest library."""
def setUp(self):
super(MyTestCase, self).setUp()
self.critical_variable = 42
class MoxTestBaseMultipleInheritanceTest(mox.MoxTestBase, MyTestCase):
"""Test that multiple inheritance can be used with MoxTestBase."""
def setUp(self):
super(MoxTestBaseMultipleInheritanceTest, self).setUp()
def testMultipleInheritance(self):
"""Should be able to access members created by all parent setUp()."""
self.assert_(isinstance(self.mox, mox.Mox))
self.assertEquals(42, self.critical_variable)
class TestClass:
"""This class is used only for testing the mock framework"""
SOME_CLASS_VAR = "test_value"
_PROTECTED_CLASS_VAR = "protected value"
def __init__(self, ivar=None):
self.__ivar = ivar
def __eq__(self, rhs):
return self.__ivar == rhs
def __ne__(self, rhs):
return not self.__eq__(rhs)
def ValidCall(self):
pass
def OtherValidCall(self):
pass
def ValidCallWithArgs(self, *args, **kwargs):
pass
@classmethod
def MyClassMethod(cls):
pass
@staticmethod
def MyStaticMethod():
pass
def _ProtectedCall(self):
pass
def __PrivateCall(self):
pass
def __getitem__(self, key):
pass
def __DoNotMock(self):
pass
def __getitem__(self, key):
"""Return the value for key."""
return self.d[key]
def __setitem__(self, key, value):
"""Set the value for key to value."""
self.d[key] = value
def __contains__(self, key):
"""Returns True if d contains the key."""
return key in self.d
def __iter__(self):
pass
class ChildClass(TestClass):
"""This inherits from TestClass."""
def __init__(self):
TestClass.__init__(self)
def ChildValidCall(self):
pass
class CallableClass(object):
"""This class is callable, and that should be mockable!"""
def __init__(self):
pass
def __call__(self, param):
return param
class SubscribtableNonIterableClass(object):
def __getitem__(self, index):
raise IndexError
class InheritsFromCallable(CallableClass):
"""This class should also be mockable; it inherits from a callable class."""
pass
if __name__ == '__main__':
unittest.main()
tests/pymox/mox_test_helper.py 0 → 100644
View file @ e9597918
#!/usr/bin/python2.4
#
# 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.
"""A very basic test class derived from mox.MoxTestBase, used by mox_test.py.
The class defined in this module is used to test the features of
MoxTestBase and is not intended to be a standalone test. It needs to
be in a separate module, because otherwise the tests in this class
(which should not all pass) would be executed as part of the
mox_test.py test suite.
See mox_test.MoxTestBaseTest for how this class is actually used.
"""
import os
import mox
class ExampleMoxTestMixin(object):
"""Mix-in class for mox test case class.
It stubs out the same function as one of the test methods in
the example test case. Both tests must pass as meta class wraps
test methods in all base classes.
"""
def testStat(self):
self.mox.StubOutWithMock(os, 'stat')
os.stat(self.DIR_PATH)
self.mox.ReplayAll()
os.stat(self.DIR_PATH)
class ExampleMoxTest(mox.MoxTestBase, ExampleMoxTestMixin):
DIR_PATH = '/path/to/some/directory'
def testSuccess(self):
self.mox.StubOutWithMock(os, 'listdir')
os.listdir(self.DIR_PATH)
self.mox.ReplayAll()
os.listdir(self.DIR_PATH)
def testExpectedNotCalled(self):
self.mox.StubOutWithMock(os, 'listdir')
os.listdir(self.DIR_PATH)
self.mox.ReplayAll()
def testUnexpectedCall(self):
self.mox.StubOutWithMock(os, 'listdir')
os.listdir(self.DIR_PATH)
self.mox.ReplayAll()
os.listdir('/path/to/some/other/directory')
os.listdir(self.DIR_PATH)
def testFailure(self):
self.assertTrue(False)
def testStatOther(self):
self.mox.StubOutWithMock(os, 'stat')
os.stat(self.DIR_PATH)
self.mox.ReplayAll()
os.stat(self.DIR_PATH)
tests/pymox/setup.py 0 → 100644
View file @ e9597918
#!/usr/bin/python2.4
from distutils.core import setup
setup(name='mox',
version='0.5.1',
py_modules=['mox', 'stubout'],
url='http://code.google.com/p/pymox/',
maintainer='pymox maintainers',
maintainer_email='mox-discuss@googlegroups.com',
license='Apache License, Version 2.0',
description='Mock object framework',
long_description='''Mox is a mock object framework for Python based on the
Java mock object framework EasyMock.''',
)
tests/pymox/stubout.py 0 → 100644
View file @ e9597918
#!/usr/bin/python2.4
#
# 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.
import inspect
class StubOutForTesting:
"""Sample Usage:
You want os.path.exists() to always return true during testing.
stubs = StubOutForTesting()
stubs.Set(os.path, 'exists', lambda x: 1)
...
stubs.UnsetAll()
The above changes os.path.exists into a lambda that returns 1. Once
the ... part of the code finishes, the UnsetAll() looks up the old value
of os.path.exists and restores it.
"""
def __init__(self):
self.cache = []
self.stubs = []
def __del__(self):
self.SmartUnsetAll()
self.UnsetAll()
def SmartSet(self, obj, attr_name, new_attr):
"""Replace obj.attr_name with new_attr. This method is smart and works
at the module, class, and instance level while preserving proper
inheritance. It will not stub out C types however unless that has been
explicitly allowed by the type.
This method supports the case where attr_name is a staticmethod or a
classmethod of obj.
Notes:
- If obj is an instance, then it is its class that will actually be
stubbed. Note that the method Set() does not do that: if obj is
an instance, it (and not its class) will be stubbed.
- The stubbing is using the builtin getattr and setattr. So, the __get__
and __set__ will be called when stubbing (TODO: A better idea would
probably be to manipulate obj.__dict__ instead of getattr() and
setattr()).
Raises AttributeError if the attribute cannot be found.
"""
if (inspect.ismodule(obj) or
(not inspect.isclass(obj) and obj.__dict__.has_key(attr_name))):
orig_obj = obj
orig_attr = getattr(obj, attr_name)
else:
if not inspect.isclass(obj):
mro = list(inspect.getmro(obj.__class__))
else:
mro = list(inspect.getmro(obj))
mro.reverse()
orig_attr = None
for cls in mro:
try:
orig_obj = cls
orig_attr = getattr(obj, attr_name)
except AttributeError:
continue
if orig_attr is None:
raise AttributeError("Attribute not found.")
# Calling getattr() on a staticmethod transforms it to a 'normal' function.
# We need to ensure that we put it back as a staticmethod.
old_attribute = obj.__dict__.get(attr_name)
if old_attribute is not None and isinstance(old_attribute, staticmethod):
orig_attr = staticmethod(orig_attr)
self.stubs.append((orig_obj, attr_name, orig_attr))
setattr(orig_obj, attr_name, new_attr)
def SmartUnsetAll(self):
"""Reverses all the SmartSet() calls, restoring things to their original
definition. Its okay to call SmartUnsetAll() repeatedly, as later calls
have no effect if no SmartSet() calls have been made.
"""
self.stubs.reverse()
for args in self.stubs:
setattr(*args)
self.stubs = []
def Set(self, parent, child_name, new_child):
"""Replace child_name's old definition with new_child, in the context
of the given parent. The parent could be a module when the child is a
function at module scope. Or the parent could be a class when a class'
method is being replaced. The named child is set to new_child, while
the prior definition is saved away for later, when UnsetAll() is called.
This method supports the case where child_name is a staticmethod or a
classmethod of parent.
"""
old_child = getattr(parent, child_name)
old_attribute = parent.__dict__.get(child_name)
if old_attribute is not None:
if isinstance(old_attribute, staticmethod):
old_child = staticmethod(old_child)
elif isinstance(old_attribute, classmethod):
old_child = classmethod(old_child.im_func)
self.cache.append((parent, old_child, child_name))
setattr(parent, child_name, new_child)
def UnsetAll(self):
"""Reverses all the Set() calls, restoring things to their original
definition. Its okay to call UnsetAll() repeatedly, as later calls have
no effect if no Set() calls have been made.
"""
# Undo calls to Set() in reverse order, in case Set() was called on the
# same arguments repeatedly (want the original call to be last one undone)
self.cache.reverse()
for (parent, old_child, child_name) in self.cache:
setattr(parent, child_name, old_child)
self.cache = []
tests/pymox/stubout_test.py 0 → 100644
View file @ e9597918
#!/usr/bin/python2.4
#
# Unit tests for stubout.
#
# 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.
import unittest
import mox
import stubout
import stubout_testee
class StubOutForTestingTest(unittest.TestCase):
def setUp(self):
self.mox = mox.Mox()
self.sample_function_backup = stubout_testee.SampleFunction
def tearDown(self):
stubout_testee.SampleFunction = self.sample_function_backup
def testSmartSetOnModule(self):
mock_function = self.mox.CreateMockAnything()
mock_function()
stubber = stubout.StubOutForTesting()
stubber.SmartSet(stubout_testee, 'SampleFunction', mock_function)
self.mox.ReplayAll()
stubout_testee.SampleFunction()
self.mox.VerifyAll()
if __name__ == '__main__':
unittest.main()
tests/pymox/stubout_testee.py 0 → 100644
View file @ e9597918
def SampleFunction():
raise Exception('I should never be called!')
tests/super_mox.py
View file @ e9597918
......@@ -8,39 +8,7 @@
import os
import random
import string
mox = None
def OnTestsLoad():
import sys
old_path = sys.path
global mox
try:
directory, _file = os.path.split(__file__)
sys.path.append(os.path.abspath(os.path.join(directory, 'pymox')))
sys.path.append(os.path.abspath(os.path.join(directory, '..')))
try:
import mox as Mox
mox = Mox
except ImportError:
print "Trying to automatically checkout pymox."
import subprocess
subprocess.call(['svn', 'co', 'http://pymox.googlecode.com/svn/trunk',
os.path.join(directory, 'pymox')],
shell=sys.platform.startswith('win'))
try:
import pymox.mox as Mox
mox = Mox
except ImportError:
print >> sys.stderr, ("\nError, failed to load pymox\n")
raise
finally:
# Restore the path
sys.path = old_path
# Automatically fetch pymox.
OnTestsLoad()
from pymox import mox
class SuperMoxTestBase(mox.MoxTestBase):
......
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