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|
'''
Created on 06.08.2014
'''
import unittest
import types
import time
try:
from java.lang import System
except:
pass
class GCDetector():
gcIndex = 0
def __del__(self):
GCDetector.gcIndex += 1
maxGCRun = 10
def runGCIfJython():
try:
currentIndex = GCDetector.gcIndex
gcCount = 0
detector = GCDetector()
detector = None
while currentIndex == GCDetector.gcIndex and gcCount < maxGCRun:
System.gc()
gcCount += 1
time.sleep(0.1)
except:
pass
finalizeMsgList = []
verbose = False
resurrectedObject_I = None
resurrectedObject_J = None
resurrectedObject_K = None
resurrectedObject_L = None
resurrectedObject_M = None
resurrectedObject_N = None
class ResurrectableDummyClass():
def __init__(self, name):
self.name = name
self.doResurrection = True
def __str__(self):
return self.name
class ResurrectableDummyClassNew(object):
def __init__(self, name):
self.name = name
self.doResurrection = True
def __str__(self):
return self.name
def __del__I(self):
global resurrectedObject_I
finalizeMsgList.append(str(self)+" finalized (ResurrectableDummyClass)")
if verbose:
print str(self)+" finalized (ResurrectableDummyClass)"
if self.doResurrection:
resurrectedObject_I = self
def __del__J(self):
global resurrectedObject_J
finalizeMsgList.append(str(self)+" finalized (ResurrectableDummyClass)")
if verbose:
print str(self)+" finalized (ResurrectableDummyClass)"
if self.doResurrection:
resurrectedObject_J = self
def __del__K(self):
global resurrectedObject_K
finalizeMsgList.append(str(self)+" finalized (ResurrectableDummyClass)")
if verbose:
print str(self)+" finalized (ResurrectableDummyClass)"
if self.doResurrection:
resurrectedObject_K = self
def __del__L(self):
global resurrectedObject_L
finalizeMsgList.append(str(self)+" finalized (ResurrectableDummyClass)")
if verbose:
print str(self)+" finalized (ResurrectableDummyClass)"
if self.doResurrection:
resurrectedObject_L = self
def __del__M(self):
global resurrectedObject_M
finalizeMsgList.append(str(self)+" finalized (ResurrectableDummyClass)")
if verbose:
print str(self)+" finalized (ResurrectableDummyClass)"
if self.doResurrection:
resurrectedObject_M = self
def __del__N(self):
global resurrectedObject_N
finalizeMsgList.append(str(self)+" finalized (ResurrectableDummyClass)")
if verbose:
print str(self)+" finalized (ResurrectableDummyClass)"
if self.doResurrection:
resurrectedObject_N = self
delI = __del__I
delJ = __del__J
delK = __del__K
delL = __del__L
delM = __del__M
delN = __del__N
class DummyClass():
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
class DummyClassDel():
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
def __del__(self):
finalizeMsgList.append(str(self)+" finalized (DummyClassDel)")
if verbose:
print str(self)+" finalized (DummyClassDel)"
class DummyClassNew(object):
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
class DummyClassDelNew(object):
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
def __del__(self):
finalizeMsgList.append(str(self)+" finalized (DummyClassDelNew)")
if verbose:
print str(self)+" finalized (DummyClassDelNew)"
class DummyFileClassNew(file):
def __init__(self, name):
self.name0 = name
def __str__(self):
return self.name0
def __del__(self):
finalizeMsgList.append(str(self)+" finalized (DummyFileClassNew)")
if verbose:
print str(self)+" finalized (DummyFileClassNew)"
def __del__class(self):
finalizeMsgList.append(str(self)+" finalized (acquired by class)")
if verbose:
print str(self)+" finalized (acquired by class)"
def __del__object(self):
finalizeMsgList.append(str(self)+" finalized (acquired by object)")
if verbose:
print str(self)+" finalized (acquired by object)"
def __del__object0():
finalizeMsgList.append("_ finalized (acquired by object)")
if verbose:
print "_ finalized (acquired by object)"
delClass = __del__class
delObject = __del__object
delObject0 = __del__object0
class TestFinalizers(unittest.TestCase):
def test_finalizer_builtin_oldStyleClass(self):
A = DummyClassDel("A")
A = None
runGCIfJython()
self.assertIn("A finalized (DummyClassDel)", finalizeMsgList)
def test_classAcquiresFinalizer_beforeInstanciation_oldStyleClass(self):
DummyClass.__del__ = delClass
B = DummyClass("B")
B = None
runGCIfJython()
self.assertIn("B finalized (acquired by class)", finalizeMsgList)
del DummyClass.__del__
def test_classAcquiresFinalizer_afterInstanciation_oldStyleClass(self):
#okay to fail in Jython without the manual __ensure_finalizer__ call
C = DummyClass("C")
DummyClass.__del__ = delClass
try:
C.__ensure_finalizer__()
except:
pass
C = None
runGCIfJython()
self.assertIn("C finalized (acquired by class)", finalizeMsgList)
del DummyClass.__del__
def test_instanceAcquiresFinalizer_bound_oldStyleClass(self):
D = DummyClassDel("D")
dl = types.MethodType(delObject, D.name)
D.__del__ = dl
D = None
runGCIfJython()
self.assertNotIn("D finalized (DummyClassDel)", finalizeMsgList)
self.assertIn("D finalized (acquired by object)", finalizeMsgList)
def test_finalizer_builtin_newStyleClass(self):
E = DummyClassDelNew("E")
E = None
runGCIfJython()
self.assertIn("E finalized (DummyClassDelNew)", finalizeMsgList)
def test_classAcquiresFinalizer_beforeInstanciation_newStyleClass(self):
DummyClassNew.__del__ = delClass
F = DummyClassNew("F")
F = None
runGCIfJython()
self.assertIn("F finalized (acquired by class)", finalizeMsgList)
del DummyClassNew.__del__
def test_classAcquiresFinalizer_afterInstanciation_newStyleClass(self):
#okay to fail in Jython without the manual __ensure_finalizer__ call
G = DummyClassNew("G")
DummyClassNew.__del__ = delClass
try:
G.__ensure_finalizer__()
except:
pass
G = None
runGCIfJython()
self.assertIn("G finalized (acquired by class)", finalizeMsgList)
del DummyClassNew.__del__
def test_instanceAcquiresFinalizer_bound_newStyleClass(self):
"""
It seems, CPython prohibits new style instances from acquiring a finalizer.
"""
H = DummyClassDelNew("H")
H.__del__ = types.MethodType(delObject, H.name)
H = None
runGCIfJython()
self.assertIn("H finalized (DummyClassDelNew)", finalizeMsgList)
self.assertNotIn("H finalized (acquired by object)", finalizeMsgList)
def test_instanceAcquiresFinalizer_bound_newStyleClass2(self):
"""
In CPython, new style instances can't acquire a finalizer.
If one calls the instance-acquired __del__ manually, it works, but the gc
will still call the old one.
"""
H = DummyClassDelNew("H2")
H.__del__ = types.MethodType(delObject, H.name)
H.__del__()
H = None
runGCIfJython()
self.assertIn("H2 finalized (DummyClassDelNew)", finalizeMsgList)
self.assertIn("H2 finalized (acquired by object)", finalizeMsgList)
def test_objectResurrection_oldStyleClass(self):
ResurrectableDummyClass.__del__ = delI
I = ResurrectableDummyClass("I")
I = None
runGCIfJython()
self.assertIn("I finalized (ResurrectableDummyClass)", finalizeMsgList)
self.assertEqual(str(resurrectedObject_I), "I")
def test_objectDoubleResurrection_oldStyleClass(self):
#okay to fail in Jython without the manual ensureFinalizer calls
ResurrectableDummyClass.__del__ = delJ
J = ResurrectableDummyClass("J")
J = None
runGCIfJython()
self.assertIn("J finalized (ResurrectableDummyClass)", finalizeMsgList)
global resurrectedObject_J
self.assertEqual(str(resurrectedObject_J), "J")
J = resurrectedObject_J
resurrectedObject_J = None
self.assertIsNone(resurrectedObject_J)
try:
#For Jython one can restore the finalizer manually.
#This is offered as an easy fix if the CPython behavior
#in this test should be needed for some reason.
J.__ensure_finalizer__()
except:
pass
J = None
runGCIfJython()
self.assertEqual(str(resurrectedObject_J), "J")
resurrectedObject_J.doResurrection = False
try:
#again...
resurrectedObject_J.__ensure_finalizer__()
except:
pass
resurrectedObject_J = None
runGCIfJython()
self.assertIsNone(resurrectedObject_J)
def test_objectDoubleResurrectionAndFinalize_oldStyleClass(self):
#okay to fail in Jython without the manual __ensure_finalizer__ calls
ResurrectableDummyClass.__del__ = delK
K = ResurrectableDummyClass("K")
K = None
runGCIfJython()
self.assertIn("K finalized (ResurrectableDummyClass)", finalizeMsgList)
finalizeMsgList.remove("K finalized (ResurrectableDummyClass)")
self.assertNotIn("K finalized (ResurrectableDummyClass)", finalizeMsgList)
global resurrectedObject_K
self.assertEqual(str(resurrectedObject_K), "K")
K = resurrectedObject_K
resurrectedObject_K = None
self.assertIsNone(resurrectedObject_K)
try:
K.__ensure_finalizer__()
except:
pass
K = None
runGCIfJython()
self.assertIn("K finalized (ResurrectableDummyClass)", finalizeMsgList)
self.assertEqual(str(resurrectedObject_K), "K")
def test_objectResurrection_newStyleClass(self):
ResurrectableDummyClassNew.__del__ = delL
L = ResurrectableDummyClassNew("L")
L = None
runGCIfJython()
self.assertIn("L finalized (ResurrectableDummyClass)", finalizeMsgList)
self.assertEqual(str(resurrectedObject_L), "L")
def test_objectDoubleResurrection_newStyleClass(self):
#okay to fail in Jython without the manual __ensure_finalizer__ calls
ResurrectableDummyClassNew.__del__ = delM
M = ResurrectableDummyClassNew("M")
M = None
runGCIfJython()
self.assertIn("M finalized (ResurrectableDummyClass)", finalizeMsgList)
global resurrectedObject_M
self.assertEqual(str(resurrectedObject_M), "M")
M = resurrectedObject_M
resurrectedObject_M = None
self.assertIsNone(resurrectedObject_M, None)
try:
M.__ensure_finalizer__()
except:
pass
M = None
runGCIfJython()
self.assertEqual(str(resurrectedObject_M), "M")
def test_objectDoubleResurrectionAndFinalize_newStyleClass(self):
#okay to fail in Jython without the manual __ensure_finalizer__ calls
ResurrectableDummyClassNew.__del__ = delN
N = ResurrectableDummyClassNew("N")
N = None
runGCIfJython()
self.assertIn("N finalized (ResurrectableDummyClass)", finalizeMsgList)
finalizeMsgList.remove("N finalized (ResurrectableDummyClass)")
self.assertNotIn("N finalized (ResurrectableDummyClass)", finalizeMsgList)
global resurrectedObject_N
self.assertEqual(str(resurrectedObject_N), "N")
N = resurrectedObject_N
resurrectedObject_N = None
self.assertIsNone(resurrectedObject_N)
try:
N.__ensure_finalizer__()
except:
pass
N = None
runGCIfJython()
self.assertIn("N finalized (ResurrectableDummyClass)", finalizeMsgList)
self.assertEqual(str(resurrectedObject_N), "N")
def test_file_overwrite_del(self):
O = DummyFileClassNew("O")
O = None
runGCIfJython()
self.assertIn("O finalized (DummyFileClassNew)", finalizeMsgList)
if __name__ == '__main__':
unittest.main()
|
