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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
from __future__ import annotations
import os
import sys
import types
from typing import NoReturn
from twisted.python import rebuild
from twisted.trial.unittest import TestCase
from . import crash_test_dummy
f = crash_test_dummy.foo
class Foo:
pass
class Bar(Foo):
pass
class Baz:
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) -> None:
self.hashCalled = False
def __hash__(self) -> NoReturn:
self.hashCalled = True
raise RuntimeError("not a TypeError!")
# Set in test_hashException
unhashableObject = None
class RebuildTests(TestCase):
"""
Simple testcase for rebuilding, to at least exercise the code.
"""
def setUp(self) -> None:
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) -> None:
sys.path.remove(self.libPath)
def test_FileRebuild(self) -> None:
import shutil
import time
from twisted.python.util import sibpath
shutil.copyfile(
sibpath(__file__, "myrebuilder1.py"),
os.path.join(self.fakelibPath, "myrebuilder.py"),
)
from twisted_rebuild_fakelib import ( # type: ignore[import-not-found]
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) -> None:
"""
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) -> None:
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) -> None:
global Foo, Buz
b = Buz()
class Foo:
def foo(self) -> None:
"""
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) -> None:
from twisted.python import rebuild
from twisted.spread import banana
rebuild.latestClass(banana.Banana)
def test_hashException(self) -> None:
"""
Rebuilding something that has a __hash__ that raises a non-TypeError
shouldn't cause rebuild to die.
"""
global unhashableObject
unhashableObject = HashRaisesRuntimeError()
def _cleanup() -> None:
global unhashableObject
unhashableObject = None
self.addCleanup(_cleanup)
rebuild.rebuild(rebuild)
self.assertTrue(unhashableObject.hashCalled)
def test_Sensitive(self) -> None:
"""
L{twisted.python.rebuild.Sensitive}
"""
from twisted.python import rebuild
from twisted.python.rebuild import Sensitive
class TestSensitive(Sensitive):
def test_method(self) -> None:
"""
Dummy method
"""
testSensitive = TestSensitive()
testSensitive.rebuildUpToDate()
self.assertFalse(testSensitive.needRebuildUpdate())
# Test rebuilding a builtin class
newException = rebuild.latestClass(Exception)
self.assertEqual(repr(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))
def myFunction() -> None:
"""
Dummy method
"""
# Test types.FunctionType
self.assertEqual(myFunction, testSensitive.latestVersionOf(myFunction))
class NewStyleTests(TestCase):
"""
Tests for rebuilding new-style classes of various sorts.
"""
def setUp(self) -> None:
self.m = types.ModuleType("whipping")
sys.modules["whipping"] = self.m
def tearDown(self) -> None:
del sys.modules["whipping"]
del self.m
def test_slots(self) -> None:
"""
Try to rebuild a new style class with slots defined.
"""
classDefinition = "class SlottedClass:\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) -> None:
"""
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)