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from unittest import TestCase, makeSuite, TestSuite
from peak.util.decorators import *
import sys
def ping(log, value):
"""Class decorator for testing"""
def pong(klass):
log.append((value,klass))
return [klass]
decorate_class(pong)
def additional_tests():
import doctest
return doctest.DocFileSuite(
'README.txt',
optionflags=doctest.ELLIPSIS|doctest.NORMALIZE_WHITESPACE,
)
class DecoratorTests(TestCase):
def testAssignAdvice(self):
log = []
def track(f,k,v,d):
log.append((f,k,v))
if k in f.f_locals:
del f.f_locals[k] # simulate old-style advisor
decorate_assignment(track,frame=sys._getframe())
test_var = 1
self.assertEqual(log, [(sys._getframe(),'test_var',1)])
log = []
decorate_assignment(track,1)
test2 = 42
self.assertEqual(log, [(sys._getframe(),'test2',42)])
# Try doing double duty, redefining an existing variable...
log = []
decorate_assignment(track,1)
decorate_assignment(track,1)
test2 = 42
self.assertEqual(log, [(sys._getframe(),'test2',42)]*2)
def testAs(self):
def f(): pass
[decorate(lambda x: [x])]
f1 = f
self.assertEqual(f1, [f])
[decorate(list, lambda x: (x,))]
f1 = f
self.assertEqual(f1, [f])
def test24DecoratorMode(self):
log = []
def track(f,k,v,d):
log.append((f,k,v))
return v
def foo(x): pass
decorate_assignment(track,1)(foo)
x = 1
self.assertEqual(log, [(sys._getframe(),'foo',foo)])
moduleLevelFrameInfo = frameinfo(sys._getframe())
class FrameInfoTest(TestCase):
classLevelFrameInfo = frameinfo(sys._getframe())
def testModuleInfo(self):
kind,module,f_locals,f_globals = moduleLevelFrameInfo
assert kind=="module"
for d in module.__dict__, f_locals, f_globals:
assert d is globals()
def testClassInfo(self):
kind,module,f_locals,f_globals = self.classLevelFrameInfo
assert kind=="class"
assert f_locals['classLevelFrameInfo'] is self.classLevelFrameInfo
for d in module.__dict__, f_globals:
assert d is globals()
def testCallInfo(self):
kind,module,f_locals,f_globals = frameinfo(sys._getframe())
assert kind=="function call"
assert f_locals is locals() # ???
for d in module.__dict__, f_globals:
assert d is globals()
def testClassExec(self):
d = {'sys':sys, 'frameinfo':frameinfo}
exec "class Foo: info=frameinfo(sys._getframe())" in d
kind,module,f_locals,f_globals = d['Foo'].info
assert kind=="class", kind
class ClassDecoratorTests(TestCase):
def testOrder(self):
log = []
class Foo:
ping(log, 1)
ping(log, 2)
ping(log, 3)
# Strip the list nesting
for i in 1,2,3:
assert isinstance(Foo,list)
Foo, = Foo
assert log == [
(1, Foo),
(2, [Foo]),
(3, [[Foo]]),
]
def testOutside(self):
try:
ping([], 1)
except SyntaxError:
pass
else:
raise AssertionError(
"Should have detected advice outside class body"
)
def testDoubleType(self):
if sys.hexversion >= 0x02030000:
return # you can't duplicate bases in 2.3
class aType(type,type):
ping([],1)
aType, = aType
assert aType.__class__ is type
def testSingleExplicitMeta(self):
class M(type): pass
class C(M):
__metaclass__ = M
ping([],1)
C, = C
assert C.__class__ is M
def testMixedMetas(self):
class M1(type): pass
class M2(type): pass
class B1: __metaclass__ = M1
class B2: __metaclass__ = M2
try:
class C(B1,B2):
ping([],1)
except TypeError:
pass
else:
raise AssertionError("Should have gotten incompatibility error")
class M3(M1,M2): pass
class C(B1,B2):
__metaclass__ = M3
ping([],1)
assert isinstance(C,list)
C, = C
assert isinstance(C,M3)
def testMetaOfClass(self):
class metameta(type):
pass
class meta(type):
__metaclass__ = metameta
assert metaclass_for_bases((meta,type))==metameta
class ClassyMetaTests(TestCase):
"""Test subclass/instance checking of classy for Python 2.6+ ABC mixin"""
def setUp(self):
class x(classy): pass
class y(x): pass
class cc(type(classy)): pass
self.__dict__.update(locals())
def test_subclassing(self):
self.failUnless(issubclass(self.x, classy))
self.failUnless(issubclass(self.y, self.x))
self.failIf(issubclass(self.x, self.y))
self.failIf(issubclass(classy, self.x))
self.failIf(issubclass(self.x, type(classy)))
def test_instancing(self):
self.failIf(isinstance(self.x, classy))
self.failUnless(isinstance(self.x, type(classy)))
self.failIf(isinstance(self.x(), type(classy)))
self.failIf(isinstance(object, type(classy)))
self.failIf(isinstance(self.x(),self.y))
self.failUnless(isinstance(self.y(),self.x))
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