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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
import sys, os
import types
from twisted.trial import unittest
from twisted.python import rebuild
from twisted.python.compat import _PY3
from . import crash_test_dummy
f = crash_test_dummy.foo
class Foo: pass
class Bar(Foo): pass
class Baz(object): pass
class Buz(Bar, Baz): pass
class HashRaisesRuntimeError:
"""
Things that don't hash (raise an Exception) should be ignored by the
rebuilder.
@ivar hashCalled: C{bool} set to True when __hash__ is called.
"""
def __init__(self):
self.hashCalled = False
def __hash__(self):
self.hashCalled = True
raise RuntimeError('not a TypeError!')
# Set in test_hashException
unhashableObject = None
class RebuildTests(unittest.TestCase):
"""
Simple testcase for rebuilding, to at least exercise the code.
"""
def setUp(self):
self.libPath = self.mktemp()
os.mkdir(self.libPath)
self.fakelibPath = os.path.join(self.libPath,
'twisted_rebuild_fakelib')
os.mkdir(self.fakelibPath)
open(os.path.join(self.fakelibPath, '__init__.py'), 'w').close()
sys.path.insert(0, self.libPath)
def tearDown(self):
sys.path.remove(self.libPath)
def test_FileRebuild(self):
from twisted.python.util import sibpath
import shutil, time
shutil.copyfile(sibpath(__file__, "myrebuilder1.py"),
os.path.join(self.fakelibPath, "myrebuilder.py"))
from twisted_rebuild_fakelib import myrebuilder
a = myrebuilder.A()
b = myrebuilder.B()
i = myrebuilder.Inherit()
self.assertEqual(a.a(), 'a')
# Necessary because the file has not "changed" if a second has not gone
# by in unix. This sucks, but it's not often that you'll be doing more
# than one reload per second.
time.sleep(1.1)
shutil.copyfile(sibpath(__file__, "myrebuilder2.py"),
os.path.join(self.fakelibPath, "myrebuilder.py"))
rebuild.rebuild(myrebuilder)
b2 = myrebuilder.B()
self.assertEqual(b2.b(), 'c')
self.assertEqual(b.b(), 'c')
self.assertEqual(i.a(), 'd')
self.assertEqual(a.a(), 'b')
def test_Rebuild(self):
"""
Rebuilding an unchanged module.
"""
# This test would actually pass if rebuild was a no-op, but it
# ensures rebuild doesn't break stuff while being a less
# complex test than testFileRebuild.
x = crash_test_dummy.X('a')
rebuild.rebuild(crash_test_dummy, doLog=False)
# Instance rebuilding is triggered by attribute access.
x.do()
self.assertEqual(x.__class__, crash_test_dummy.X)
self.assertEqual(f, crash_test_dummy.foo)
def test_ComponentInteraction(self):
x = crash_test_dummy.XComponent()
x.setAdapter(crash_test_dummy.IX, crash_test_dummy.XA)
x.getComponent(crash_test_dummy.IX)
rebuild.rebuild(crash_test_dummy, 0)
newComponent = x.getComponent(crash_test_dummy.IX)
newComponent.method()
self.assertEqual(newComponent.__class__, crash_test_dummy.XA)
# Test that a duplicate registerAdapter is not allowed
from twisted.python import components
self.assertRaises(ValueError, components.registerAdapter,
crash_test_dummy.XA, crash_test_dummy.X,
crash_test_dummy.IX)
def test_UpdateInstance(self):
global Foo, Buz
b = Buz()
class Foo:
def foo(self):
"""
Dummy method
"""
class Buz(Bar, Baz):
x = 10
rebuild.updateInstance(b)
assert hasattr(b, 'foo'), "Missing method on rebuilt instance"
assert hasattr(b, 'x'), "Missing class attribute on rebuilt instance"
def test_BananaInteraction(self):
from twisted.python import rebuild
from twisted.spread import banana
rebuild.latestClass(banana.Banana)
def test_hashException(self):
"""
Rebuilding something that has a __hash__ that raises a non-TypeError
shouldn't cause rebuild to die.
"""
global unhashableObject
unhashableObject = HashRaisesRuntimeError()
def _cleanup():
global unhashableObject
unhashableObject = None
self.addCleanup(_cleanup)
rebuild.rebuild(rebuild)
self.assertTrue(unhashableObject.hashCalled)
def test_Sensitive(self):
"""
L{twisted.python.rebuild.Sensitive}
"""
from twisted.python import rebuild
from twisted.python.rebuild import Sensitive
class TestSensitive(Sensitive):
def test_method(self):
"""
Dummy method
"""
testSensitive = TestSensitive()
testSensitive.rebuildUpToDate()
self.assertFalse(testSensitive.needRebuildUpdate())
# Test rebuilding a builtin class
newException = rebuild.latestClass(Exception)
if _PY3:
self.assertEqual(repr(Exception), repr(newException))
else:
self.assertIn('twisted.python.rebuild.Exception', repr(newException))
self.assertEqual(newException, testSensitive.latestVersionOf(newException))
# Test types.MethodType on method in class
self.assertEqual(TestSensitive.test_method,
testSensitive.latestVersionOf(TestSensitive.test_method))
# Test types.MethodType on method in instance of class
self.assertEqual(testSensitive.test_method,
testSensitive.latestVersionOf(testSensitive.test_method))
# Test a class
self.assertEqual(TestSensitive,
testSensitive.latestVersionOf(TestSensitive))
class Foo:
"""
Dummy class
"""
foo = Foo()
# Test types.InstanceType
self.assertEqual(foo, testSensitive.latestVersionOf(foo))
def myFunction():
"""
Dummy method
"""
# Test types.FunctionType
self.assertEqual(myFunction, testSensitive.latestVersionOf(myFunction))
class NewStyleTests(unittest.TestCase):
"""
Tests for rebuilding new-style classes of various sorts.
"""
def setUp(self):
self.m = types.ModuleType('whipping')
sys.modules['whipping'] = self.m
def tearDown(self):
del sys.modules['whipping']
del self.m
def test_slots(self):
"""
Try to rebuild a new style class with slots defined.
"""
classDefinition = (
"class SlottedClass(object):\n"
" __slots__ = ['a']\n")
exec(classDefinition, self.m.__dict__)
inst = self.m.SlottedClass()
inst.a = 7
exec(classDefinition, self.m.__dict__)
rebuild.updateInstance(inst)
self.assertEqual(inst.a, 7)
self.assertIs(type(inst), self.m.SlottedClass)
def test_typeSubclass(self):
"""
Try to rebuild a base type subclass.
"""
classDefinition = (
"class ListSubclass(list):\n"
" pass\n")
exec(classDefinition, self.m.__dict__)
inst = self.m.ListSubclass()
inst.append(2)
exec(classDefinition, self.m.__dict__)
rebuild.updateInstance(inst)
self.assertEqual(inst[0], 2)
self.assertIs(type(inst), self.m.ListSubclass)
def test_instanceSlots(self):
"""
Test that when rebuilding an instance with a __slots__ attribute, it
fails accurately instead of giving a L{rebuild.RebuildError}.
"""
classDefinition = (
"class NotSlottedClass(object):\n"
" pass\n")
exec(classDefinition, self.m.__dict__)
inst = self.m.NotSlottedClass()
inst.__slots__ = ['a']
classDefinition = (
"class NotSlottedClass:\n"
" pass\n")
exec(classDefinition, self.m.__dict__)
# Moving from new-style class to old-style should fail.
self.assertRaises(TypeError, rebuild.updateInstance, inst)
if getattr(types, 'ClassType', None) is None:
test_instanceSlots.skip = "Old-style classes not supported on Python 3"
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