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cpython/Lib/test/test_descr.py

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# Test enhancements related to descriptors and new-style classes
from test.test_support import verify, vereq, verbose, TestFailed, TESTFN, get_original_stdout, run_doctest
from copy import deepcopy
import warnings
warnings.filterwarnings("ignore",
r'complex divmod\(\), // and % are deprecated$',
DeprecationWarning, r'(<string>|%s)$' % __name__)
def veris(a, b):
if a is not b:
raise TestFailed, "%r is %r" % (a, b)
def testunop(a, res, expr="len(a)", meth="__len__"):
if verbose: print "checking", expr
dict = {'a': a}
vereq(eval(expr, dict), res)
t = type(a)
m = getattr(t, meth)
while meth not in t.__dict__:
t = t.__bases__[0]
vereq(m, t.__dict__[meth])
vereq(m(a), res)
bm = getattr(a, meth)
vereq(bm(), res)
def testbinop(a, b, res, expr="a+b", meth="__add__"):
if verbose: print "checking", expr
dict = {'a': a, 'b': b}
# XXX Hack so this passes before 2.3 when -Qnew is specified.
if meth == "__div__" and 1/2 == 0.5:
meth = "__truediv__"
vereq(eval(expr, dict), res)
t = type(a)
m = getattr(t, meth)
while meth not in t.__dict__:
t = t.__bases__[0]
vereq(m, t.__dict__[meth])
vereq(m(a, b), res)
bm = getattr(a, meth)
vereq(bm(b), res)
def testternop(a, b, c, res, expr="a[b:c]", meth="__getslice__"):
if verbose: print "checking", expr
dict = {'a': a, 'b': b, 'c': c}
vereq(eval(expr, dict), res)
t = type(a)
m = getattr(t, meth)
while meth not in t.__dict__:
t = t.__bases__[0]
vereq(m, t.__dict__[meth])
vereq(m(a, b, c), res)
bm = getattr(a, meth)
vereq(bm(b, c), res)
def testsetop(a, b, res, stmt="a+=b", meth="__iadd__"):
if verbose: print "checking", stmt
dict = {'a': deepcopy(a), 'b': b}
exec stmt in dict
vereq(dict['a'], res)
t = type(a)
m = getattr(t, meth)
while meth not in t.__dict__:
t = t.__bases__[0]
vereq(m, t.__dict__[meth])
dict['a'] = deepcopy(a)
m(dict['a'], b)
vereq(dict['a'], res)
dict['a'] = deepcopy(a)
bm = getattr(dict['a'], meth)
bm(b)
vereq(dict['a'], res)
def testset2op(a, b, c, res, stmt="a[b]=c", meth="__setitem__"):
if verbose: print "checking", stmt
dict = {'a': deepcopy(a), 'b': b, 'c': c}
exec stmt in dict
vereq(dict['a'], res)
t = type(a)
m = getattr(t, meth)
while meth not in t.__dict__:
t = t.__bases__[0]
vereq(m, t.__dict__[meth])
dict['a'] = deepcopy(a)
m(dict['a'], b, c)
vereq(dict['a'], res)
dict['a'] = deepcopy(a)
bm = getattr(dict['a'], meth)
bm(b, c)
vereq(dict['a'], res)
def testset3op(a, b, c, d, res, stmt="a[b:c]=d", meth="__setslice__"):
if verbose: print "checking", stmt
dict = {'a': deepcopy(a), 'b': b, 'c': c, 'd': d}
exec stmt in dict
vereq(dict['a'], res)
t = type(a)
while meth not in t.__dict__:
t = t.__bases__[0]
m = getattr(t, meth)
vereq(m, t.__dict__[meth])
dict['a'] = deepcopy(a)
m(dict['a'], b, c, d)
vereq(dict['a'], res)
dict['a'] = deepcopy(a)
bm = getattr(dict['a'], meth)
bm(b, c, d)
vereq(dict['a'], res)
def class_docstrings():
class Classic:
"A classic docstring."
vereq(Classic.__doc__, "A classic docstring.")
vereq(Classic.__dict__['__doc__'], "A classic docstring.")
class Classic2:
pass
verify(Classic2.__doc__ is None)
class NewStatic(object):
"Another docstring."
vereq(NewStatic.__doc__, "Another docstring.")
vereq(NewStatic.__dict__['__doc__'], "Another docstring.")
class NewStatic2(object):
pass
verify(NewStatic2.__doc__ is None)
class NewDynamic(object):
"Another docstring."
vereq(NewDynamic.__doc__, "Another docstring.")
vereq(NewDynamic.__dict__['__doc__'], "Another docstring.")
class NewDynamic2(object):
pass
verify(NewDynamic2.__doc__ is None)
def lists():
if verbose: print "Testing list operations..."
testbinop([1], [2], [1,2], "a+b", "__add__")
testbinop([1,2,3], 2, 1, "b in a", "__contains__")
testbinop([1,2,3], 4, 0, "b in a", "__contains__")
testbinop([1,2,3], 1, 2, "a[b]", "__getitem__")
testternop([1,2,3], 0, 2, [1,2], "a[b:c]", "__getslice__")
testsetop([1], [2], [1,2], "a+=b", "__iadd__")
testsetop([1,2], 3, [1,2,1,2,1,2], "a*=b", "__imul__")
testunop([1,2,3], 3, "len(a)", "__len__")
testbinop([1,2], 3, [1,2,1,2,1,2], "a*b", "__mul__")
testbinop([1,2], 3, [1,2,1,2,1,2], "b*a", "__rmul__")
testset2op([1,2], 1, 3, [1,3], "a[b]=c", "__setitem__")
testset3op([1,2,3,4], 1, 3, [5,6], [1,5,6,4], "a[b:c]=d", "__setslice__")
def dicts():
if verbose: print "Testing dict operations..."
testbinop({1:2}, {2:1}, -1, "cmp(a,b)", "__cmp__")
testbinop({1:2,3:4}, 1, 1, "b in a", "__contains__")
testbinop({1:2,3:4}, 2, 0, "b in a", "__contains__")
testbinop({1:2,3:4}, 1, 2, "a[b]", "__getitem__")
d = {1:2,3:4}
l1 = []
for i in d.keys(): l1.append(i)
l = []
for i in iter(d): l.append(i)
vereq(l, l1)
l = []
for i in d.__iter__(): l.append(i)
vereq(l, l1)
l = []
for i in dict.__iter__(d): l.append(i)
vereq(l, l1)
d = {1:2, 3:4}
testunop(d, 2, "len(a)", "__len__")
vereq(eval(repr(d), {}), d)
vereq(eval(d.__repr__(), {}), d)
testset2op({1:2,3:4}, 2, 3, {1:2,2:3,3:4}, "a[b]=c", "__setitem__")
def dict_constructor():
if verbose:
print "Testing dict constructor ..."
d = dict()
vereq(d, {})
d = dict({})
vereq(d, {})
d = dict({1: 2, 'a': 'b'})
vereq(d, {1: 2, 'a': 'b'})
vereq(d, dict(d.items()))
vereq(d, dict(d.iteritems()))
d = dict({'one':1, 'two':2})
vereq(d, dict(one=1, two=2))
vereq(d, dict(**d))
vereq(d, dict({"one": 1}, two=2))
vereq(d, dict([("two", 2)], one=1))
vereq(d, dict([("one", 100), ("two", 200)], **d))
verify(d is not dict(**d))
for badarg in 0, 0L, 0j, "0", [0], (0,):
try:
dict(badarg)
except TypeError:
pass
except ValueError:
if badarg == "0":
# It's a sequence, and its elements are also sequences (gotta
# love strings <wink>), but they aren't of length 2, so this
# one seemed better as a ValueError than a TypeError.
pass
else:
raise TestFailed("no TypeError from dict(%r)" % badarg)
else:
raise TestFailed("no TypeError from dict(%r)" % badarg)
try:
dict({}, {})
except TypeError:
pass
else:
raise TestFailed("no TypeError from dict({}, {})")
class Mapping:
# Lacks a .keys() method; will be added later.
dict = {1:2, 3:4, 'a':1j}
try:
dict(Mapping())
except TypeError:
pass
else:
raise TestFailed("no TypeError from dict(incomplete mapping)")
Mapping.keys = lambda self: self.dict.keys()
Mapping.__getitem__ = lambda self, i: self.dict[i]
d = dict(Mapping())
vereq(d, Mapping.dict)
# Init from sequence of iterable objects, each producing a 2-sequence.
class AddressBookEntry:
def __init__(self, first, last):
self.first = first
self.last = last
def __iter__(self):
return iter([self.first, self.last])
d = dict([AddressBookEntry('Tim', 'Warsaw'),
AddressBookEntry('Barry', 'Peters'),
AddressBookEntry('Tim', 'Peters'),
AddressBookEntry('Barry', 'Warsaw')])
vereq(d, {'Barry': 'Warsaw', 'Tim': 'Peters'})
d = dict(zip(range(4), range(1, 5)))
vereq(d, dict([(i, i+1) for i in range(4)]))
# Bad sequence lengths.
for bad in [('tooshort',)], [('too', 'long', 'by 1')]:
try:
dict(bad)
except ValueError:
pass
else:
raise TestFailed("no ValueError from dict(%r)" % bad)
def test_dir():
if verbose:
print "Testing dir() ..."
junk = 12
vereq(dir(), ['junk'])
del junk
# Just make sure these don't blow up!
for arg in 2, 2L, 2j, 2e0, [2], "2", u"2", (2,), {2:2}, type, test_dir:
dir(arg)
# Try classic classes.
class C:
Cdata = 1
def Cmethod(self): pass
cstuff = ['Cdata', 'Cmethod', '__doc__', '__module__']
vereq(dir(C), cstuff)
verify('im_self' in dir(C.Cmethod))
c = C() # c.__doc__ is an odd thing to see here; ditto c.__module__.
vereq(dir(c), cstuff)
c.cdata = 2
c.cmethod = lambda self: 0
vereq(dir(c), cstuff + ['cdata', 'cmethod'])
verify('im_self' in dir(c.Cmethod))
class A(C):
Adata = 1
def Amethod(self): pass
astuff = ['Adata', 'Amethod'] + cstuff
vereq(dir(A), astuff)
verify('im_self' in dir(A.Amethod))
a = A()
vereq(dir(a), astuff)
verify('im_self' in dir(a.Amethod))
a.adata = 42
a.amethod = lambda self: 3
vereq(dir(a), astuff + ['adata', 'amethod'])
# The same, but with new-style classes. Since these have object as a
# base class, a lot more gets sucked in.
def interesting(strings):
return [s for s in strings if not s.startswith('_')]
class C(object):
Cdata = 1
def Cmethod(self): pass
cstuff = ['Cdata', 'Cmethod']
vereq(interesting(dir(C)), cstuff)
c = C()
vereq(interesting(dir(c)), cstuff)
verify('im_self' in dir(C.Cmethod))
c.cdata = 2
c.cmethod = lambda self: 0
vereq(interesting(dir(c)), cstuff + ['cdata', 'cmethod'])
verify('im_self' in dir(c.Cmethod))
class A(C):
Adata = 1
def Amethod(self): pass
astuff = ['Adata', 'Amethod'] + cstuff
vereq(interesting(dir(A)), astuff)
verify('im_self' in dir(A.Amethod))
a = A()
vereq(interesting(dir(a)), astuff)
a.adata = 42
a.amethod = lambda self: 3
vereq(interesting(dir(a)), astuff + ['adata', 'amethod'])
verify('im_self' in dir(a.Amethod))
# Try a module subclass.
import sys
class M(type(sys)):
pass
minstance = M("m")
minstance.b = 2
minstance.a = 1
names = [x for x in dir(minstance) if x not in ["__name__", "__doc__"]]
vereq(names, ['a', 'b'])
class M2(M):
def getdict(self):
return "Not a dict!"
__dict__ = property(getdict)
m2instance = M2("m2")
m2instance.b = 2
m2instance.a = 1
vereq(m2instance.__dict__, "Not a dict!")
try:
dir(m2instance)
except TypeError:
pass
# Two essentially featureless objects, just inheriting stuff from
# object.
vereq(dir(None), dir(Ellipsis))
# Nasty test case for proxied objects
class Wrapper(object):
def __init__(self, obj):
self.__obj = obj
def __repr__(self):
return "Wrapper(%s)" % repr(self.__obj)
def __getitem__(self, key):
return Wrapper(self.__obj[key])
def __len__(self):
return len(self.__obj)
def __getattr__(self, name):
return Wrapper(getattr(self.__obj, name))
class C(object):
def __getclass(self):
return Wrapper(type(self))
__class__ = property(__getclass)
dir(C()) # This used to segfault
binops = {
'add': '+',
'sub': '-',
'mul': '*',
'div': '/',
'mod': '%',
'divmod': 'divmod',
'pow': '**',
'lshift': '<<',
'rshift': '>>',
'and': '&',
'xor': '^',
'or': '|',
'cmp': 'cmp',
'lt': '<',
'le': '<=',
'eq': '==',
'ne': '!=',
'gt': '>',
'ge': '>=',
}
for name, expr in binops.items():
if expr.islower():
expr = expr + "(a, b)"
else:
expr = 'a %s b' % expr
binops[name] = expr
unops = {
'pos': '+',
'neg': '-',
'abs': 'abs',
'invert': '~',
'int': 'int',
'long': 'long',
'float': 'float',
'oct': 'oct',
'hex': 'hex',
}
for name, expr in unops.items():
if expr.islower():
expr = expr + "(a)"
else:
expr = '%s a' % expr
unops[name] = expr
def numops(a, b, skip=[]):
dict = {'a': a, 'b': b}
for name, expr in binops.items():
if name not in skip:
name = "__%s__" % name
if hasattr(a, name):
res = eval(expr, dict)
testbinop(a, b, res, expr, name)
for name, expr in unops.items():
if name not in skip:
name = "__%s__" % name
if hasattr(a, name):
res = eval(expr, dict)
testunop(a, res, expr, name)
def ints():
if verbose: print "Testing int operations..."
numops(100, 3)
# The following crashes in Python 2.2
vereq((1).__nonzero__(), 1)
vereq((0).__nonzero__(), 0)
# This returns 'NotImplemented' in Python 2.2
class C(int):
def __add__(self, other):
return NotImplemented
vereq(C(5L), 5)
try:
C() + ""
except TypeError:
pass
else:
raise TestFailed, "NotImplemented should have caused TypeError"
import sys
try:
C(sys.maxint+1)
except OverflowError:
pass
else:
raise TestFailed, "should have raised OverflowError"
def longs():
if verbose: print "Testing long operations..."
numops(100L, 3L)
def floats():
if verbose: print "Testing float operations..."
numops(100.0, 3.0)
def complexes():
if verbose: print "Testing complex operations..."
numops(100.0j, 3.0j, skip=['lt', 'le', 'gt', 'ge', 'int', 'long', 'float'])
class Number(complex):
__slots__ = ['prec']
def __new__(cls, *args, **kwds):
result = complex.__new__(cls, *args)
result.prec = kwds.get('prec', 12)
return result
def __repr__(self):
prec = self.prec
if self.imag == 0.0:
return "%.*g" % (prec, self.real)
if self.real == 0.0:
return "%.*gj" % (prec, self.imag)
return "(%.*g+%.*gj)" % (prec, self.real, prec, self.imag)
__str__ = __repr__
a = Number(3.14, prec=6)
vereq(repr(a), "3.14")
vereq(a.prec, 6)
a = Number(a, prec=2)
vereq(repr(a), "3.1")
vereq(a.prec, 2)
a = Number(234.5)
vereq(repr(a), "234.5")
vereq(a.prec, 12)
def spamlists():
if verbose: print "Testing spamlist operations..."
import copy, xxsubtype as spam
def spamlist(l, memo=None):
import xxsubtype as spam
return spam.spamlist(l)
# This is an ugly hack:
copy._deepcopy_dispatch[spam.spamlist] = spamlist
testbinop(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+b", "__add__")
testbinop(spamlist([1,2,3]), 2, 1, "b in a", "__contains__")
testbinop(spamlist([1,2,3]), 4, 0, "b in a", "__contains__")
testbinop(spamlist([1,2,3]), 1, 2, "a[b]", "__getitem__")
testternop(spamlist([1,2,3]), 0, 2, spamlist([1,2]),
"a[b:c]", "__getslice__")
testsetop(spamlist([1]), spamlist([2]), spamlist([1,2]),
"a+=b", "__iadd__")
testsetop(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*=b", "__imul__")
testunop(spamlist([1,2,3]), 3, "len(a)", "__len__")
testbinop(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*b", "__mul__")
testbinop(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "b*a", "__rmul__")
testset2op(spamlist([1,2]), 1, 3, spamlist([1,3]), "a[b]=c", "__setitem__")
testset3op(spamlist([1,2,3,4]), 1, 3, spamlist([5,6]),
spamlist([1,5,6,4]), "a[b:c]=d", "__setslice__")
# Test subclassing
class C(spam.spamlist):
def foo(self): return 1
a = C()
vereq(a, [])
vereq(a.foo(), 1)
a.append(100)
vereq(a, [100])
vereq(a.getstate(), 0)
a.setstate(42)
vereq(a.getstate(), 42)
def spamdicts():
if verbose: print "Testing spamdict operations..."
import copy, xxsubtype as spam
def spamdict(d, memo=None):
import xxsubtype as spam
sd = spam.spamdict()
for k, v in d.items(): sd[k] = v
return sd
# This is an ugly hack:
copy._deepcopy_dispatch[spam.spamdict] = spamdict
testbinop(spamdict({1:2}), spamdict({2:1}), -1, "cmp(a,b)", "__cmp__")
testbinop(spamdict({1:2,3:4}), 1, 1, "b in a", "__contains__")
testbinop(spamdict({1:2,3:4}), 2, 0, "b in a", "__contains__")
testbinop(spamdict({1:2,3:4}), 1, 2, "a[b]", "__getitem__")
d = spamdict({1:2,3:4})
l1 = []
for i in d.keys(): l1.append(i)
l = []
for i in iter(d): l.append(i)
vereq(l, l1)
l = []
for i in d.__iter__(): l.append(i)
vereq(l, l1)
l = []
for i in type(spamdict({})).__iter__(d): l.append(i)
vereq(l, l1)
straightd = {1:2, 3:4}
spamd = spamdict(straightd)
testunop(spamd, 2, "len(a)", "__len__")
testunop(spamd, repr(straightd), "repr(a)", "__repr__")
testset2op(spamdict({1:2,3:4}), 2, 3, spamdict({1:2,2:3,3:4}),
"a[b]=c", "__setitem__")
# Test subclassing
class C(spam.spamdict):
def foo(self): return 1
a = C()
vereq(a.items(), [])
vereq(a.foo(), 1)
a['foo'] = 'bar'
vereq(a.items(), [('foo', 'bar')])
vereq(a.getstate(), 0)
a.setstate(100)
vereq(a.getstate(), 100)
def pydicts():
if verbose: print "Testing Python subclass of dict..."
verify(issubclass(dict, dict))
verify(isinstance({}, dict))
d = dict()
vereq(d, {})
verify(d.__class__ is dict)
verify(isinstance(d, dict))
class C(dict):
state = -1
def __init__(self, *a, **kw):
if a:
vereq(len(a), 1)
self.state = a[0]
if kw:
for k, v in kw.items(): self[v] = k
def __getitem__(self, key):
return self.get(key, 0)
def __setitem__(self, key, value):
verify(isinstance(key, type(0)))
dict.__setitem__(self, key, value)
def setstate(self, state):
self.state = state
def getstate(self):
return self.state
verify(issubclass(C, dict))
a1 = C(12)
vereq(a1.state, 12)
a2 = C(foo=1, bar=2)
vereq(a2[1] == 'foo' and a2[2], 'bar')
a = C()
vereq(a.state, -1)
vereq(a.getstate(), -1)
a.setstate(0)
vereq(a.state, 0)
vereq(a.getstate(), 0)
a.setstate(10)
vereq(a.state, 10)
vereq(a.getstate(), 10)
vereq(a[42], 0)
a[42] = 24
vereq(a[42], 24)
if verbose: print "pydict stress test ..."
N = 50
for i in range(N):
a[i] = C()
for j in range(N):
a[i][j] = i*j
for i in range(N):
for j in range(N):
vereq(a[i][j], i*j)
def pylists():
if verbose: print "Testing Python subclass of list..."
class C(list):
def __getitem__(self, i):
return list.__getitem__(self, i) + 100
def __getslice__(self, i, j):
return (i, j)
a = C()
a.extend([0,1,2])
vereq(a[0], 100)
vereq(a[1], 101)
vereq(a[2], 102)
vereq(a[100:200], (100,200))
def metaclass():
if verbose: print "Testing __metaclass__..."
class C:
__metaclass__ = type
def __init__(self):
self.__state = 0
def getstate(self):
return self.__state
def setstate(self, state):
self.__state = state
a = C()
vereq(a.getstate(), 0)
a.setstate(10)
vereq(a.getstate(), 10)
class D:
class __metaclass__(type):
def myself(cls): return cls
vereq(D.myself(), D)
d = D()
verify(d.__class__ is D)
class M1(type):
def __new__(cls, name, bases, dict):
dict['__spam__'] = 1
return type.__new__(cls, name, bases, dict)
class C:
__metaclass__ = M1
vereq(C.__spam__, 1)
c = C()
vereq(c.__spam__, 1)
class _instance(object):
pass
class M2(object):
@staticmethod
def __new__(cls, name, bases, dict):
self = object.__new__(cls)
self.name = name
self.bases = bases
self.dict = dict
return self
def __call__(self):
it = _instance()
# Early binding of methods
for key in self.dict:
if key.startswith("__"):
continue
setattr(it, key, self.dict[key].__get__(it, self))
return it
class C:
__metaclass__ = M2
def spam(self):
return 42
vereq(C.name, 'C')
vereq(C.bases, ())
verify('spam' in C.dict)
c = C()
vereq(c.spam(), 42)
# More metaclass examples
class autosuper(type):
# Automatically add __super to the class
# This trick only works for dynamic classes
def __new__(metaclass, name, bases, dict):
cls = super(autosuper, metaclass).__new__(metaclass,
name, bases, dict)
# Name mangling for __super removes leading underscores
while name[:1] == "_":
name = name[1:]
if name:
name = "_%s__super" % name
else:
name = "__super"
setattr(cls, name, super(cls))
return cls
class A:
__metaclass__ = autosuper
def meth(self):
return "A"
class B(A):
def meth(self):
return "B" + self.__super.meth()
class C(A):
def meth(self):
return "C" + self.__super.meth()
class D(C, B):
def meth(self):
return "D" + self.__super.meth()
vereq(D().meth(), "DCBA")
class E(B, C):
def meth(self):
return "E" + self.__super.meth()
vereq(E().meth(), "EBCA")
class autoproperty(type):
# Automatically create property attributes when methods
# named _get_x and/or _set_x are found
def __new__(metaclass, name, bases, dict):
hits = {}
for key, val in dict.iteritems():
if key.startswith("_get_"):
key = key[5:]
get, set = hits.get(key, (None, None))
get = val
hits[key] = get, set
elif key.startswith("_set_"):
key = key[5:]
get, set = hits.get(key, (None, None))
set = val
hits[key] = get, set
for key, (get, set) in hits.iteritems():
dict[key] = property(get, set)
return super(autoproperty, metaclass).__new__(metaclass,
name, bases, dict)
class A:
__metaclass__ = autoproperty
def _get_x(self):
return -self.__x
def _set_x(self, x):
self.__x = -x
a = A()
verify(not hasattr(a, "x"))
a.x = 12
vereq(a.x, 12)
vereq(a._A__x, -12)
class multimetaclass(autoproperty, autosuper):
# Merge of multiple cooperating metaclasses
pass
class A:
__metaclass__ = multimetaclass
def _get_x(self):
return "A"
class B(A):
def _get_x(self):
return "B" + self.__super._get_x()
class C(A):
def _get_x(self):
return "C" + self.__super._get_x()
class D(C, B):
def _get_x(self):
return "D" + self.__super._get_x()
vereq(D().x, "DCBA")
# Make sure type(x) doesn't call x.__class__.__init__
class T(type):
counter = 0
def __init__(self, *args):
T.counter += 1
class C:
__metaclass__ = T
vereq(T.counter, 1)
a = C()
vereq(type(a), C)
vereq(T.counter, 1)
class C(object): pass
c = C()
try: c()
except TypeError: pass
else: raise TestFailed, "calling object w/o call method should raise TypeError"
# Testing code to find most derived baseclass
class A(type):
def __new__(*args, **kwargs):
return type.__new__(*args, **kwargs)
class B(object):
pass
class C(object):
__metaclass__ = A
# The most derived metaclass of D is A rather than type.
class D(B, C):
pass
def pymods():
if verbose: print "Testing Python subclass of module..."
log = []
import sys
MT = type(sys)
class MM(MT):
def __init__(self, name):
MT.__init__(self, name)
def __getattribute__(self, name):
log.append(("getattr", name))
return MT.__getattribute__(self, name)
def __setattr__(self, name, value):
log.append(("setattr", name, value))
MT.__setattr__(self, name, value)
def __delattr__(self, name):
log.append(("delattr", name))
MT.__delattr__(self, name)
a = MM("a")
a.foo = 12
x = a.foo
del a.foo
vereq(log, [("setattr", "foo", 12),
("getattr", "foo"),
("delattr", "foo")])
def multi():
if verbose: print "Testing multiple inheritance..."
class C(object):
def __init__(self):
self.__state = 0
def getstate(self):
return self.__state
def setstate(self, state):
self.__state = state
a = C()
vereq(a.getstate(), 0)
a.setstate(10)
vereq(a.getstate(), 10)
class D(dict, C):
def __init__(self):
type({}).__init__(self)
C.__init__(self)
d = D()
vereq(d.keys(), [])
d["hello"] = "world"
vereq(d.items(), [("hello", "world")])
vereq(d["hello"], "world")
vereq(d.getstate(), 0)
d.setstate(10)
vereq(d.getstate(), 10)
vereq(D.__mro__, (D, dict, C, object))
# SF bug #442833
class Node(object):
def __int__(self):
return int(self.foo())
def foo(self):
return "23"
class Frag(Node, list):
def foo(self):
return "42"
vereq(Node().__int__(), 23)
vereq(int(Node()), 23)
vereq(Frag().__int__(), 42)
vereq(int(Frag()), 42)
# MI mixing classic and new-style classes.
class A:
x = 1
class B(A):
pass
class C(A):
x = 2
class D(B, C):
pass
vereq(D.x, 1)
# Classic MRO is preserved for a classic base class.
class E(D, object):
pass
vereq(E.__mro__, (E, D, B, A, C, object))
vereq(E.x, 1)
# But with a mix of classic bases, their MROs are combined using
# new-style MRO.
class F(B, C, object):
pass
vereq(F.__mro__, (F, B, C, A, object))
vereq(F.x, 2)
# Try something else.
class C:
def cmethod(self):
return "C a"
def all_method(self):
return "C b"
class M1(C, object):
def m1method(self):
return "M1 a"
def all_method(self):
return "M1 b"
vereq(M1.__mro__, (M1, C, object))
m = M1()
vereq(m.cmethod(), "C a")
vereq(m.m1method(), "M1 a")
vereq(m.all_method(), "M1 b")
class D(C):
def dmethod(self):
return "D a"
def all_method(self):
return "D b"
class M2(D, object):
def m2method(self):
return "M2 a"
def all_method(self):
return "M2 b"
vereq(M2.__mro__, (M2, D, C, object))
m = M2()
vereq(m.cmethod(), "C a")
vereq(m.dmethod(), "D a")
vereq(m.m2method(), "M2 a")
vereq(m.all_method(), "M2 b")
class M3(M1, M2, object):
def m3method(self):
return "M3 a"
def all_method(self):
return "M3 b"
vereq(M3.__mro__, (M3, M1, M2, D, C, object))
m = M3()
vereq(m.cmethod(), "C a")
vereq(m.dmethod(), "D a")
vereq(m.m1method(), "M1 a")
vereq(m.m2method(), "M2 a")
vereq(m.m3method(), "M3 a")
vereq(m.all_method(), "M3 b")
class Classic:
pass
try:
class New(Classic):
__metaclass__ = type
except TypeError:
pass
else:
raise TestFailed, "new class with only classic bases - shouldn't be"
def diamond():
if verbose: print "Testing multiple inheritance special cases..."
class A(object):
def spam(self): return "A"
vereq(A().spam(), "A")
class B(A):
def boo(self): return "B"
def spam(self): return "B"
vereq(B().spam(), "B")
vereq(B().boo(), "B")
class C(A):
def boo(self): return "C"
vereq(C().spam(), "A")
vereq(C().boo(), "C")
class D(B, C): pass
vereq(D().spam(), "B")
vereq(D().boo(), "B")
vereq(D.__mro__, (D, B, C, A, object))
class E(C, B): pass
vereq(E().spam(), "B")
vereq(E().boo(), "C")
vereq(E.__mro__, (E, C, B, A, object))
# MRO order disagreement
try:
class F(D, E): pass
except TypeError:
pass
else:
raise TestFailed, "expected MRO order disagreement (F)"
try:
class G(E, D): pass
except TypeError:
pass
else:
raise TestFailed, "expected MRO order disagreement (G)"
# see thread python-dev/2002-October/029035.html
def ex5():
if verbose: print "Testing ex5 from C3 switch discussion..."
class A(object): pass
class B(object): pass
class C(object): pass
class X(A): pass
class Y(A): pass
class Z(X,B,Y,C): pass
vereq(Z.__mro__, (Z, X, B, Y, A, C, object))
# see "A Monotonic Superclass Linearization for Dylan",
# by Kim Barrett et al. (OOPSLA 1996)
def monotonicity():
if verbose: print "Testing MRO monotonicity..."
class Boat(object): pass
class DayBoat(Boat): pass
class WheelBoat(Boat): pass
class EngineLess(DayBoat): pass
class SmallMultihull(DayBoat): pass
class PedalWheelBoat(EngineLess,WheelBoat): pass
class SmallCatamaran(SmallMultihull): pass
class Pedalo(PedalWheelBoat,SmallCatamaran): pass
vereq(PedalWheelBoat.__mro__,
(PedalWheelBoat, EngineLess, DayBoat, WheelBoat, Boat,
object))
vereq(SmallCatamaran.__mro__,
(SmallCatamaran, SmallMultihull, DayBoat, Boat, object))
vereq(Pedalo.__mro__,
(Pedalo, PedalWheelBoat, EngineLess, SmallCatamaran,
SmallMultihull, DayBoat, WheelBoat, Boat, object))
# see "A Monotonic Superclass Linearization for Dylan",
# by Kim Barrett et al. (OOPSLA 1996)
def consistency_with_epg():
if verbose: print "Testing consistentcy with EPG..."
class Pane(object): pass
class ScrollingMixin(object): pass
class EditingMixin(object): pass
class ScrollablePane(Pane,ScrollingMixin): pass
class EditablePane(Pane,EditingMixin): pass
class EditableScrollablePane(ScrollablePane,EditablePane): pass
vereq(EditableScrollablePane.__mro__,
(EditableScrollablePane, ScrollablePane, EditablePane,
Pane, ScrollingMixin, EditingMixin, object))
mro_err_msg = """Cannot create a consistent method resolution
order (MRO) for bases """
def mro_disagreement():
if verbose: print "Testing error messages for MRO disagreement..."
def raises(exc, expected, callable, *args):
try:
callable(*args)
except exc, msg:
if not str(msg).startswith(expected):
raise TestFailed, "Message %r, expected %r" % (str(msg),
expected)
else:
raise TestFailed, "Expected %s" % exc
class A(object): pass
class B(A): pass
class C(object): pass
# Test some very simple errors
raises(TypeError, "duplicate base class A",
type, "X", (A, A), {})
raises(TypeError, mro_err_msg,
type, "X", (A, B), {})
raises(TypeError, mro_err_msg,
type, "X", (A, C, B), {})
# Test a slightly more complex error
class GridLayout(object): pass
class HorizontalGrid(GridLayout): pass
class VerticalGrid(GridLayout): pass
class HVGrid(HorizontalGrid, VerticalGrid): pass
class VHGrid(VerticalGrid, HorizontalGrid): pass
raises(TypeError, mro_err_msg,
type, "ConfusedGrid", (HVGrid, VHGrid), {})
def objects():
if verbose: print "Testing object class..."
a = object()
vereq(a.__class__, object)
vereq(type(a), object)
b = object()
verify(a is not b)
verify(not hasattr(a, "foo"))
try:
a.foo = 12
except (AttributeError, TypeError):
pass
else:
verify(0, "object() should not allow setting a foo attribute")
verify(not hasattr(object(), "__dict__"))
class Cdict(object):
pass
x = Cdict()
vereq(x.__dict__, {})
x.foo = 1
vereq(x.foo, 1)
vereq(x.__dict__, {'foo': 1})
def slots():
if verbose: print "Testing __slots__..."
class C0(object):
__slots__ = []
x = C0()
verify(not hasattr(x, "__dict__"))
verify(not hasattr(x, "foo"))
class C1(object):
__slots__ = ['a']
x = C1()
verify(not hasattr(x, "__dict__"))
verify(not hasattr(x, "a"))
x.a = 1
vereq(x.a, 1)
x.a = None
veris(x.a, None)
del x.a
verify(not hasattr(x, "a"))
class C3(object):
__slots__ = ['a', 'b', 'c']
x = C3()
verify(not hasattr(x, "__dict__"))
verify(not hasattr(x, 'a'))
verify(not hasattr(x, 'b'))
verify(not hasattr(x, 'c'))
x.a = 1
x.b = 2
x.c = 3
vereq(x.a, 1)
vereq(x.b, 2)
vereq(x.c, 3)
class C4(object):
"""Validate name mangling"""
__slots__ = ['__a']
def __init__(self, value):
self.__a = value
def get(self):
return self.__a
x = C4(5)
verify(not hasattr(x, '__dict__'))
verify(not hasattr(x, '__a'))
vereq(x.get(), 5)
try:
x.__a = 6
except AttributeError:
pass
else:
raise TestFailed, "Double underscored names not mangled"
# Make sure slot names are proper identifiers
try:
class C(object):
__slots__ = [None]
except TypeError:
pass
else:
raise TestFailed, "[None] slots not caught"
try:
class C(object):
__slots__ = ["foo bar"]
except TypeError:
pass
else:
raise TestFailed, "['foo bar'] slots not caught"
try:
class C(object):
__slots__ = ["foo\0bar"]
except TypeError:
pass
else:
raise TestFailed, "['foo\\0bar'] slots not caught"
try:
class C(object):
__slots__ = ["1"]
except TypeError:
pass
else:
raise TestFailed, "['1'] slots not caught"
try:
class C(object):
__slots__ = [""]
except TypeError:
pass
else:
raise TestFailed, "[''] slots not caught"
class C(object):
__slots__ = ["a", "a_b", "_a", "A0123456789Z"]
# Test unicode slot names
try:
unichr
except NameError:
pass
else:
# _unicode_to_string used to modify slots in certain circumstances
slots = (unicode("foo"), unicode("bar"))
class C(object):
__slots__ = slots
x = C()
x.foo = 5
vereq(x.foo, 5)
veris(type(slots[0]), unicode)
# this used to leak references
try:
class C(object):
__slots__ = [unichr(128)]
except (TypeError, UnicodeEncodeError):
pass
else:
raise TestFailed, "[unichr(128)] slots not caught"
# Test leaks
class Counted(object):
counter = 0 # counts the number of instances alive
def __init__(self):
Counted.counter += 1
def __del__(self):
Counted.counter -= 1
class C(object):
__slots__ = ['a', 'b', 'c']
x = C()
x.a = Counted()
x.b = Counted()
x.c = Counted()
vereq(Counted.counter, 3)
del x
vereq(Counted.counter, 0)
class D(C):
pass
x = D()
x.a = Counted()
x.z = Counted()
vereq(Counted.counter, 2)
del x
vereq(Counted.counter, 0)
class E(D):
__slots__ = ['e']
x = E()
x.a = Counted()
x.z = Counted()
x.e = Counted()
vereq(Counted.counter, 3)
del x
vereq(Counted.counter, 0)
# Test cyclical leaks [SF bug 519621]
class F(object):
__slots__ = ['a', 'b']
log = []
s = F()
s.a = [Counted(), s]
vereq(Counted.counter, 1)
s = None
import gc
gc.collect()
vereq(Counted.counter, 0)
# Test lookup leaks [SF bug 572567]
import sys,gc
class G(object):
def __cmp__(self, other):
return 0
g = G()
orig_objects = len(gc.get_objects())
for i in xrange(10):
g==g
new_objects = len(gc.get_objects())
vereq(orig_objects, new_objects)
class H(object):
__slots__ = ['a', 'b']
def __init__(self):
self.a = 1
self.b = 2
def __del__(self):
assert self.a == 1
assert self.b == 2
save_stderr = sys.stderr
sys.stderr = sys.stdout
h = H()
try:
del h
finally:
sys.stderr = save_stderr
def slotspecials():
if verbose: print "Testing __dict__ and __weakref__ in __slots__..."
class D(object):
__slots__ = ["__dict__"]
a = D()
verify(hasattr(a, "__dict__"))
verify(not hasattr(a, "__weakref__"))
a.foo = 42
vereq(a.__dict__, {"foo": 42})
class W(object):
__slots__ = ["__weakref__"]
a = W()
verify(hasattr(a, "__weakref__"))
verify(not hasattr(a, "__dict__"))
try:
a.foo = 42
except AttributeError:
pass
else:
raise TestFailed, "shouldn't be allowed to set a.foo"
class C1(W, D):
__slots__ = []
a = C1()
verify(hasattr(a, "__dict__"))
verify(hasattr(a, "__weakref__"))
a.foo = 42
vereq(a.__dict__, {"foo": 42})
class C2(D, W):
__slots__ = []
a = C2()
verify(hasattr(a, "__dict__"))
verify(hasattr(a, "__weakref__"))
a.foo = 42
vereq(a.__dict__, {"foo": 42})
# MRO order disagreement
#
# class C3(C1, C2):
# __slots__ = []
#
# class C4(C2, C1):
# __slots__ = []
def dynamics():
if verbose: print "Testing class attribute propagation..."
class D(object):
pass
class E(D):
pass
class F(D):
pass
D.foo = 1
vereq(D.foo, 1)
# Test that dynamic attributes are inherited
vereq(E.foo, 1)
vereq(F.foo, 1)
# Test dynamic instances
class C(object):
pass
a = C()
verify(not hasattr(a, "foobar"))
C.foobar = 2
vereq(a.foobar, 2)
C.method = lambda self: 42
vereq(a.method(), 42)
C.__repr__ = lambda self: "C()"
vereq(repr(a), "C()")
C.__int__ = lambda self: 100
vereq(int(a), 100)
vereq(a.foobar, 2)
verify(not hasattr(a, "spam"))
def mygetattr(self, name):
if name == "spam":
return "spam"
raise AttributeError
C.__getattr__ = mygetattr
vereq(a.spam, "spam")
a.new = 12
vereq(a.new, 12)
def mysetattr(self, name, value):
if name == "spam":
raise AttributeError
return object.__setattr__(self, name, value)
C.__setattr__ = mysetattr
try:
a.spam = "not spam"
except AttributeError:
pass
else:
verify(0, "expected AttributeError")
vereq(a.spam, "spam")
class D(C):
pass
d = D()
d.foo = 1
vereq(d.foo, 1)
# Test handling of int*seq and seq*int
class I(int):
pass
vereq("a"*I(2), "aa")
vereq(I(2)*"a", "aa")
vereq(2*I(3), 6)
vereq(I(3)*2, 6)
vereq(I(3)*I(2), 6)
# Test handling of long*seq and seq*long
class L(long):
pass
vereq("a"*L(2L), "aa")
vereq(L(2L)*"a", "aa")
vereq(2*L(3), 6)
vereq(L(3)*2, 6)
vereq(L(3)*L(2), 6)
# Test comparison of classes with dynamic metaclasses
class dynamicmetaclass(type):
pass
class someclass:
__metaclass__ = dynamicmetaclass
verify(someclass != object)
def errors():
"""Test that type can't be placed after an instance of type in bases.
>>> class C(list, dict):
... pass
Traceback (most recent call last):
TypeError: Error when calling the metaclass bases
multiple bases have instance lay-out conflict
>>> class C(object, None):
... pass
Traceback (most recent call last):
TypeError: Error when calling the metaclass bases
bases must be types
>>> class C(type(len)):
... pass
Traceback (most recent call last):
TypeError: Error when calling the metaclass bases
type 'builtin_function_or_method' is not an acceptable base type
>>> class Classic:
... def __init__(*args): pass
>>> class C(object):
... __metaclass__ = Classic
>>> class C(object):
... __slots__ = 1
Traceback (most recent call last):
TypeError: Error when calling the metaclass bases
'int' object is not iterable
>>> class C(object):
... __slots__ = [1]
Traceback (most recent call last):
TypeError: Error when calling the metaclass bases
__slots__ items must be strings, not 'int'
>>> class A(object):
... pass
>>> class B(A, type):
... pass
Traceback (most recent call last):
TypeError: Error when calling the metaclass bases
metaclass conflict: type must occur in bases before other non-classic base classes
Create two different metaclasses in order to setup an error where
there is no inheritance relationship between the metaclass of a class
and the metaclass of its bases.
>>> class M1(type):
... pass
>>> class M2(type):
... pass
>>> class A1(object):
... __metaclass__ = M1
>>> class A2(object):
... __metaclass__ = M2
>>> class B(A1, A2):
... pass
Traceback (most recent call last):
TypeError: Error when calling the metaclass bases
metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
>>> class B(A1):
... pass
Also check that assignment to bases is safe.
>>> B.__bases__ = A1, A2
Traceback (most recent call last):
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
>>> B.__bases__ = A2,
Traceback (most recent call last):
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases
>>> class M3(M1):
... pass
>>> class C(object):
... __metaclass__ = M3
>>> B.__bases__ = C,
Traceback (most recent call last):
TypeError: assignment to __bases__ may not change metatype
"""
def classmethods():
if verbose: print "Testing class methods..."
class C(object):
def foo(*a): return a
goo = classmethod(foo)
c = C()
vereq(C.goo(1), (C, 1))
vereq(c.goo(1), (C, 1))
vereq(c.foo(1), (c, 1))
class D(C):
pass
d = D()
vereq(D.goo(1), (D, 1))
vereq(d.goo(1), (D, 1))
vereq(d.foo(1), (d, 1))
vereq(D.foo(d, 1), (d, 1))
# Test for a specific crash (SF bug 528132)
def f(cls, arg): return (cls, arg)
ff = classmethod(f)
vereq(ff.__get__(0, int)(42), (int, 42))
vereq(ff.__get__(0)(42), (int, 42))
# Test super() with classmethods (SF bug 535444)
veris(C.goo.im_self, C)
veris(D.goo.im_self, D)
veris(super(D,D).goo.im_self, D)
veris(super(D,d).goo.im_self, D)
vereq(super(D,D).goo(), (D,))
vereq(super(D,d).goo(), (D,))
# Verify that argument is checked for callability (SF bug 753451)
try:
classmethod(1).__get__(1)
except TypeError:
pass
else:
raise TestFailed, "classmethod should check for callability"
# Verify that classmethod() doesn't allow keyword args
try:
classmethod(f, kw=1)
except TypeError:
pass
else:
raise TestFailed, "classmethod shouldn't accept keyword args"
def classmethods_in_c():
if verbose: print "Testing C-based class methods..."
import xxsubtype as spam
a = (1, 2, 3)
d = {'abc': 123}
x, a1, d1 = spam.spamlist.classmeth(*a, **d)
veris(x, spam.spamlist)
vereq(a, a1)
vereq(d, d1)
x, a1, d1 = spam.spamlist().classmeth(*a, **d)
veris(x, spam.spamlist)
vereq(a, a1)
vereq(d, d1)
def staticmethods():
if verbose: print "Testing static methods..."
class C(object):
def foo(*a): return a
goo = staticmethod(foo)
c = C()
vereq(C.goo(1), (1,))
vereq(c.goo(1), (1,))
vereq(c.foo(1), (c, 1,))
class D(C):
pass
d = D()
vereq(D.goo(1), (1,))
vereq(d.goo(1), (1,))
vereq(d.foo(1), (d, 1))
vereq(D.foo(d, 1), (d, 1))
def staticmethods_in_c():
if verbose: print "Testing C-based static methods..."
import xxsubtype as spam
a = (1, 2, 3)
d = {"abc": 123}
x, a1, d1 = spam.spamlist.staticmeth(*a, **d)
veris(x, None)
vereq(a, a1)
vereq(d, d1)
x, a1, d2 = spam.spamlist().staticmeth(*a, **d)
veris(x, None)
vereq(a, a1)
vereq(d, d1)
def classic():
if verbose: print "Testing classic classes..."
class C:
def foo(*a): return a
goo = classmethod(foo)
c = C()
vereq(C.goo(1), (C, 1))
vereq(c.goo(1), (C, 1))
vereq(c.foo(1), (c, 1))
class D(C):
pass
d = D()
vereq(D.goo(1), (D, 1))
vereq(d.goo(1), (D, 1))
vereq(d.foo(1), (d, 1))
vereq(D.foo(d, 1), (d, 1))
class E: # *not* subclassing from C
foo = C.foo
vereq(E().foo, C.foo) # i.e., unbound
verify(repr(C.foo.__get__(C())).startswith("<bound method "))
def compattr():
if verbose: print "Testing computed attributes..."
class C(object):
class computed_attribute(object):
def __init__(self, get, set=None, delete=None):
self.__get = get
self.__set = set
self.__delete = delete
def __get__(self, obj, type=None):
return self.__get(obj)
def __set__(self, obj, value):
return self.__set(obj, value)
def __delete__(self, obj):
return self.__delete(obj)
def __init__(self):
self.__x = 0
def __get_x(self):
x = self.__x
self.__x = x+1
return x
def __set_x(self, x):
self.__x = x
def __delete_x(self):
del self.__x
x = computed_attribute(__get_x, __set_x, __delete_x)
a = C()
vereq(a.x, 0)
vereq(a.x, 1)
a.x = 10
vereq(a.x, 10)
vereq(a.x, 11)
del a.x
vereq(hasattr(a, 'x'), 0)
def newslot():
if verbose: print "Testing __new__ slot override..."
class C(list):
def __new__(cls):
self = list.__new__(cls)
self.foo = 1
return self
def __init__(self):
self.foo = self.foo + 2
a = C()
vereq(a.foo, 3)
verify(a.__class__ is C)
class D(C):
pass
b = D()
vereq(b.foo, 3)
verify(b.__class__ is D)
def altmro():
if verbose: print "Testing mro() and overriding it..."
class A(object):
def f(self): return "A"
class B(A):
pass
class C(A):
def f(self): return "C"
class D(B, C):
pass
vereq(D.mro(), [D, B, C, A, object])
vereq(D.__mro__, (D, B, C, A, object))
vereq(D().f(), "C")
class PerverseMetaType(type):
def mro(cls):
L = type.mro(cls)
L.reverse()
return L
class X(D,B,C,A):
__metaclass__ = PerverseMetaType
vereq(X.__mro__, (object, A, C, B, D, X))
vereq(X().f(), "A")
try:
class X(object):
class __metaclass__(type):
def mro(self):
return [self, dict, object]
except TypeError:
pass
else:
raise TestFailed, "devious mro() return not caught"
try:
class X(object):
class __metaclass__(type):
def mro(self):
return [1]
except TypeError:
pass
else:
raise TestFailed, "non-class mro() return not caught"
try:
class X(object):
class __metaclass__(type):
def mro(self):
return 1
except TypeError:
pass
else:
raise TestFailed, "non-sequence mro() return not caught"
def overloading():
if verbose: print "Testing operator overloading..."
class B(object):
"Intermediate class because object doesn't have a __setattr__"
class C(B):
def __getattr__(self, name):
if name == "foo":
return ("getattr", name)
else:
raise AttributeError
def __setattr__(self, name, value):
if name == "foo":
self.setattr = (name, value)
else:
return B.__setattr__(self, name, value)
def __delattr__(self, name):
if name == "foo":
self.delattr = name
else:
return B.__delattr__(self, name)
def __getitem__(self, key):
return ("getitem", key)
def __setitem__(self, key, value):
self.setitem = (key, value)
def __delitem__(self, key):
self.delitem = key
def __getslice__(self, i, j):
return ("getslice", i, j)
def __setslice__(self, i, j, value):
self.setslice = (i, j, value)
def __delslice__(self, i, j):
self.delslice = (i, j)
a = C()
vereq(a.foo, ("getattr", "foo"))
a.foo = 12
vereq(a.setattr, ("foo", 12))
del a.foo
vereq(a.delattr, "foo")
vereq(a[12], ("getitem", 12))
a[12] = 21
vereq(a.setitem, (12, 21))
del a[12]
vereq(a.delitem, 12)
vereq(a[0:10], ("getslice", 0, 10))
a[0:10] = "foo"
vereq(a.setslice, (0, 10, "foo"))
del a[0:10]
vereq(a.delslice, (0, 10))
def methods():
if verbose: print "Testing methods..."
class C(object):
def __init__(self, x):
self.x = x
def foo(self):
return self.x
c1 = C(1)
vereq(c1.foo(), 1)
class D(C):
boo = C.foo
goo = c1.foo
d2 = D(2)
vereq(d2.foo(), 2)
vereq(d2.boo(), 2)
vereq(d2.goo(), 1)
class E(object):
foo = C.foo
vereq(E().foo, C.foo) # i.e., unbound
verify(repr(C.foo.__get__(C(1))).startswith("<bound method "))
def specials():
# Test operators like __hash__ for which a built-in default exists
if verbose: print "Testing special operators..."
# Test the default behavior for static classes
class C(object):
def __getitem__(self, i):
if 0 <= i < 10: return i
raise IndexError
c1 = C()
c2 = C()
verify(not not c1)
verify(id(c1) != id(c2))
hash(c1)
hash(c2)
vereq(cmp(c1, c2), cmp(id(c1), id(c2)))
vereq(c1, c1)
verify(c1 != c2)
verify(not c1 != c1)
verify(not c1 == c2)
# Note that the module name appears in str/repr, and that varies
# depending on whether this test is run standalone or from a framework.
verify(str(c1).find('C object at ') >= 0)
vereq(str(c1), repr(c1))
verify(-1 not in c1)
for i in range(10):
verify(i in c1)
verify(10 not in c1)
# Test the default behavior for dynamic classes
class D(object):
def __getitem__(self, i):
if 0 <= i < 10: return i
raise IndexError
d1 = D()
d2 = D()
verify(not not d1)
verify(id(d1) != id(d2))
hash(d1)
hash(d2)
vereq(cmp(d1, d2), cmp(id(d1), id(d2)))
vereq(d1, d1)
verify(d1 != d2)
verify(not d1 != d1)
verify(not d1 == d2)
# Note that the module name appears in str/repr, and that varies
# depending on whether this test is run standalone or from a framework.
verify(str(d1).find('D object at ') >= 0)
vereq(str(d1), repr(d1))
verify(-1 not in d1)
for i in range(10):
verify(i in d1)
verify(10 not in d1)
# Test overridden behavior for static classes
class Proxy(object):
def __init__(self, x):
self.x = x
def __nonzero__(self):
return not not self.x
def __hash__(self):
return hash(self.x)
def __eq__(self, other):
return self.x == other
def __ne__(self, other):
return self.x != other
def __cmp__(self, other):
return cmp(self.x, other.x)
def __str__(self):
return "Proxy:%s" % self.x
def __repr__(self):
return "Proxy(%r)" % self.x
def __contains__(self, value):
return value in self.x
p0 = Proxy(0)
p1 = Proxy(1)
p_1 = Proxy(-1)
verify(not p0)
verify(not not p1)
vereq(hash(p0), hash(0))
vereq(p0, p0)
verify(p0 != p1)
verify(not p0 != p0)
vereq(not p0, p1)
vereq(cmp(p0, p1), -1)
vereq(cmp(p0, p0), 0)
vereq(cmp(p0, p_1), 1)
vereq(str(p0), "Proxy:0")
vereq(repr(p0), "Proxy(0)")
p10 = Proxy(range(10))
verify(-1 not in p10)
for i in range(10):
verify(i in p10)
verify(10 not in p10)
# Test overridden behavior for dynamic classes
class DProxy(object):
def __init__(self, x):
self.x = x
def __nonzero__(self):
return not not self.x
def __hash__(self):
return hash(self.x)
def __eq__(self, other):
return self.x == other
def __ne__(self, other):
return self.x != other
def __cmp__(self, other):
return cmp(self.x, other.x)
def __str__(self):
return "DProxy:%s" % self.x
def __repr__(self):
return "DProxy(%r)" % self.x
def __contains__(self, value):
return value in self.x
p0 = DProxy(0)
p1 = DProxy(1)
p_1 = DProxy(-1)
verify(not p0)
verify(not not p1)
vereq(hash(p0), hash(0))
vereq(p0, p0)
verify(p0 != p1)
verify(not p0 != p0)
vereq(not p0, p1)
vereq(cmp(p0, p1), -1)
vereq(cmp(p0, p0), 0)
vereq(cmp(p0, p_1), 1)
vereq(str(p0), "DProxy:0")
vereq(repr(p0), "DProxy(0)")
p10 = DProxy(range(10))
verify(-1 not in p10)
for i in range(10):
verify(i in p10)
verify(10 not in p10)
# Safety test for __cmp__
def unsafecmp(a, b):
try:
a.__class__.__cmp__(a, b)
except TypeError:
pass
else:
raise TestFailed, "shouldn't allow %s.__cmp__(%r, %r)" % (
a.__class__, a, b)
unsafecmp(u"123", "123")
unsafecmp("123", u"123")
unsafecmp(1, 1.0)
unsafecmp(1.0, 1)
unsafecmp(1, 1L)
unsafecmp(1L, 1)
class Letter(str):
def __new__(cls, letter):
if letter == 'EPS':
return str.__new__(cls)
return str.__new__(cls, letter)
def __str__(self):
if not self:
return 'EPS'
return self
# sys.stdout needs to be the original to trigger the recursion bug
import sys
test_stdout = sys.stdout
sys.stdout = get_original_stdout()
try:
# nothing should actually be printed, this should raise an exception
print Letter('w')
except RuntimeError:
pass
else:
raise TestFailed, "expected a RuntimeError for print recursion"
sys.stdout = test_stdout
def weakrefs():
if verbose: print "Testing weak references..."
import weakref
class C(object):
pass
c = C()
r = weakref.ref(c)
verify(r() is c)
del c
verify(r() is None)
del r
class NoWeak(object):
__slots__ = ['foo']
no = NoWeak()
try:
weakref.ref(no)
except TypeError, msg:
verify(str(msg).find("weak reference") >= 0)
else:
verify(0, "weakref.ref(no) should be illegal")
class Weak(object):
__slots__ = ['foo', '__weakref__']
yes = Weak()
r = weakref.ref(yes)
verify(r() is yes)
del yes
verify(r() is None)
del r
def properties():
if verbose: print "Testing property..."
class C(object):
def getx(self):
return self.__x
def setx(self, value):
self.__x = value
def delx(self):
del self.__x
x = property(getx, setx, delx, doc="I'm the x property.")
a = C()
verify(not hasattr(a, "x"))
a.x = 42
vereq(a._C__x, 42)
vereq(a.x, 42)
del a.x
verify(not hasattr(a, "x"))
verify(not hasattr(a, "_C__x"))
C.x.__set__(a, 100)
vereq(C.x.__get__(a), 100)
C.x.__delete__(a)
verify(not hasattr(a, "x"))
raw = C.__dict__['x']
verify(isinstance(raw, property))
attrs = dir(raw)
verify("__doc__" in attrs)
verify("fget" in attrs)
verify("fset" in attrs)
verify("fdel" in attrs)
vereq(raw.__doc__, "I'm the x property.")
verify(raw.fget is C.__dict__['getx'])
verify(raw.fset is C.__dict__['setx'])
verify(raw.fdel is C.__dict__['delx'])
for attr in "__doc__", "fget", "fset", "fdel":
try:
setattr(raw, attr, 42)
except TypeError, msg:
if str(msg).find('readonly') < 0:
raise TestFailed("when setting readonly attr %r on a "
"property, got unexpected TypeError "
"msg %r" % (attr, str(msg)))
else:
raise TestFailed("expected TypeError from trying to set "
"readonly %r attr on a property" % attr)
class D(object):
__getitem__ = property(lambda s: 1/0)
d = D()
try:
for i in d:
str(i)
except ZeroDivisionError:
pass
else:
raise TestFailed, "expected ZeroDivisionError from bad property"
class E(object):
def getter(self):
"getter method"
return 0
def setter(self, value):
"setter method"
pass
prop = property(getter)
vereq(prop.__doc__, "getter method")
prop2 = property(fset=setter)
vereq(prop2.__doc__, None)
# this segfaulted in 2.5b2
try:
import _testcapi
except ImportError:
pass
else:
class X(object):
p = property(_testcapi.test_with_docstring)
def supers():
if verbose: print "Testing super..."
class A(object):
def meth(self, a):
return "A(%r)" % a
vereq(A().meth(1), "A(1)")
class B(A):
def __init__(self):
self.__super = super(B, self)
def meth(self, a):
return "B(%r)" % a + self.__super.meth(a)
vereq(B().meth(2), "B(2)A(2)")
class C(A):
def meth(self, a):
return "C(%r)" % a + self.__super.meth(a)
C._C__super = super(C)
vereq(C().meth(3), "C(3)A(3)")
class D(C, B):
def meth(self, a):
return "D(%r)" % a + super(D, self).meth(a)
vereq(D().meth(4), "D(4)C(4)B(4)A(4)")
# Test for subclassing super
class mysuper(super):
def __init__(self, *args):
return super(mysuper, self).__init__(*args)
class E(D):
def meth(self, a):
return "E(%r)" % a + mysuper(E, self).meth(a)
vereq(E().meth(5), "E(5)D(5)C(5)B(5)A(5)")
class F(E):
def meth(self, a):
s = self.__super # == mysuper(F, self)
return "F(%r)[%s]" % (a, s.__class__.__name__) + s.meth(a)
F._F__super = mysuper(F)
vereq(F().meth(6), "F(6)[mysuper]E(6)D(6)C(6)B(6)A(6)")
# Make sure certain errors are raised
try:
super(D, 42)
except TypeError:
pass
else:
raise TestFailed, "shouldn't allow super(D, 42)"
try:
super(D, C())
except TypeError:
pass
else:
raise TestFailed, "shouldn't allow super(D, C())"
try:
super(D).__get__(12)
except TypeError:
pass
else:
raise TestFailed, "shouldn't allow super(D).__get__(12)"
try:
super(D).__get__(C())
except TypeError:
pass
else:
raise TestFailed, "shouldn't allow super(D).__get__(C())"
# Make sure data descriptors can be overridden and accessed via super
# (new feature in Python 2.3)
class DDbase(object):
def getx(self): return 42
x = property(getx)
class DDsub(DDbase):
def getx(self): return "hello"
x = property(getx)
dd = DDsub()
vereq(dd.x, "hello")
vereq(super(DDsub, dd).x, 42)
# Ensure that super() lookup of descriptor from classmethod
# works (SF ID# 743627)
class Base(object):
aProp = property(lambda self: "foo")
class Sub(Base):
@classmethod
def test(klass):
return super(Sub,klass).aProp
veris(Sub.test(), Base.aProp)
# Verify that super() doesn't allow keyword args
try:
super(Base, kw=1)
except TypeError:
pass
else:
raise TestFailed, "super shouldn't accept keyword args"
def inherits():
if verbose: print "Testing inheritance from basic types..."
class hexint(int):
def __repr__(self):
return hex(self)
def __add__(self, other):
return hexint(int.__add__(self, other))
# (Note that overriding __radd__ doesn't work,
# because the int type gets first dibs.)
vereq(repr(hexint(7) + 9), "0x10")
vereq(repr(hexint(1000) + 7), "0x3ef")
a = hexint(12345)
vereq(a, 12345)
vereq(int(a), 12345)
verify(int(a).__class__ is int)
vereq(hash(a), hash(12345))
verify((+a).__class__ is int)
verify((a >> 0).__class__ is int)
verify((a << 0).__class__ is int)
verify((hexint(0) << 12).__class__ is int)
verify((hexint(0) >> 12).__class__ is int)
class octlong(long):
__slots__ = []
def __str__(self):
s = oct(self)
if s[-1] == 'L':
s = s[:-1]
return s
def __add__(self, other):
return self.__class__(super(octlong, self).__add__(other))
__radd__ = __add__
vereq(str(octlong(3) + 5), "010")
# (Note that overriding __radd__ here only seems to work
# because the example uses a short int left argument.)
vereq(str(5 + octlong(3000)), "05675")
a = octlong(12345)
vereq(a, 12345L)
vereq(long(a), 12345L)
vereq(hash(a), hash(12345L))
verify(long(a).__class__ is long)
verify((+a).__class__ is long)
verify((-a).__class__ is long)
verify((-octlong(0)).__class__ is long)
verify((a >> 0).__class__ is long)
verify((a << 0).__class__ is long)
verify((a - 0).__class__ is long)
verify((a * 1).__class__ is long)
verify((a ** 1).__class__ is long)
verify((a // 1).__class__ is long)
verify((1 * a).__class__ is long)
verify((a | 0).__class__ is long)
verify((a ^ 0).__class__ is long)
verify((a & -1L).__class__ is long)
verify((octlong(0) << 12).__class__ is long)
verify((octlong(0) >> 12).__class__ is long)
verify(abs(octlong(0)).__class__ is long)
# Because octlong overrides __add__, we can't check the absence of +0
# optimizations using octlong.
class longclone(long):
pass
a = longclone(1)
verify((a + 0).__class__ is long)
verify((0 + a).__class__ is long)
# Check that negative clones don't segfault
a = longclone(-1)
vereq(a.__dict__, {})
vereq(long(a), -1) # verify PyNumber_Long() copies the sign bit
class precfloat(float):
__slots__ = ['prec']
def __init__(self, value=0.0, prec=12):
self.prec = int(prec)
def __repr__(self):
return "%.*g" % (self.prec, self)
vereq(repr(precfloat(1.1)), "1.1")
a = precfloat(12345)
vereq(a, 12345.0)
vereq(float(a), 12345.0)
verify(float(a).__class__ is float)
vereq(hash(a), hash(12345.0))
verify((+a).__class__ is float)
class madcomplex(complex):
def __repr__(self):
return "%.17gj%+.17g" % (self.imag, self.real)
a = madcomplex(-3, 4)
vereq(repr(a), "4j-3")
base = complex(-3, 4)
veris(base.__class__, complex)
vereq(a, base)
vereq(complex(a), base)
veris(complex(a).__class__, complex)
a = madcomplex(a) # just trying another form of the constructor
vereq(repr(a), "4j-3")
vereq(a, base)
vereq(complex(a), base)
veris(complex(a).__class__, complex)
vereq(hash(a), hash(base))
veris((+a).__class__, complex)
veris((a + 0).__class__, complex)
vereq(a + 0, base)
veris((a - 0).__class__, complex)
vereq(a - 0, base)
veris((a * 1).__class__, complex)
vereq(a * 1, base)
veris((a / 1).__class__, complex)
vereq(a / 1, base)
class madtuple(tuple):
_rev = None
def rev(self):
if self._rev is not None:
return self._rev
L = list(self)
L.reverse()
self._rev = self.__class__(L)
return self._rev
a = madtuple((1,2,3,4,5,6,7,8,9,0))
vereq(a, (1,2,3,4,5,6,7,8,9,0))
vereq(a.rev(), madtuple((0,9,8,7,6,5,4,3,2,1)))
vereq(a.rev().rev(), madtuple((1,2,3,4,5,6,7,8,9,0)))
for i in range(512):
t = madtuple(range(i))
u = t.rev()
v = u.rev()
vereq(v, t)
a = madtuple((1,2,3,4,5))
vereq(tuple(a), (1,2,3,4,5))
verify(tuple(a).__class__ is tuple)
vereq(hash(a), hash((1,2,3,4,5)))
verify(a[:].__class__ is tuple)
verify((a * 1).__class__ is tuple)
verify((a * 0).__class__ is tuple)
verify((a + ()).__class__ is tuple)
a = madtuple(())
vereq(tuple(a), ())
verify(tuple(a).__class__ is tuple)
verify((a + a).__class__ is tuple)
verify((a * 0).__class__ is tuple)
verify((a * 1).__class__ is tuple)
verify((a * 2).__class__ is tuple)
verify(a[:].__class__ is tuple)
class madstring(str):
_rev = None
def rev(self):
if self._rev is not None:
return self._rev
L = list(self)
L.reverse()
self._rev = self.__class__("".join(L))
return self._rev
s = madstring("abcdefghijklmnopqrstuvwxyz")
vereq(s, "abcdefghijklmnopqrstuvwxyz")
vereq(s.rev(), madstring("zyxwvutsrqponmlkjihgfedcba"))
vereq(s.rev().rev(), madstring("abcdefghijklmnopqrstuvwxyz"))
for i in range(256):
s = madstring("".join(map(chr, range(i))))
t = s.rev()
u = t.rev()
vereq(u, s)
s = madstring("12345")
vereq(str(s), "12345")
verify(str(s).__class__ is str)
base = "\x00" * 5
s = madstring(base)
vereq(s, base)
vereq(str(s), base)
verify(str(s).__class__ is str)
vereq(hash(s), hash(base))
vereq({s: 1}[base], 1)
vereq({base: 1}[s], 1)
verify((s + "").__class__ is str)
vereq(s + "", base)
verify(("" + s).__class__ is str)
vereq("" + s, base)
verify((s * 0).__class__ is str)
vereq(s * 0, "")
verify((s * 1).__class__ is str)
vereq(s * 1, base)
verify((s * 2).__class__ is str)
vereq(s * 2, base + base)
verify(s[:].__class__ is str)
vereq(s[:], base)
verify(s[0:0].__class__ is str)
vereq(s[0:0], "")
verify(s.strip().__class__ is str)
vereq(s.strip(), base)
verify(s.lstrip().__class__ is str)
vereq(s.lstrip(), base)
verify(s.rstrip().__class__ is str)
vereq(s.rstrip(), base)
identitytab = ''.join([chr(i) for i in range(256)])
verify(s.translate(identitytab).__class__ is str)
vereq(s.translate(identitytab), base)
verify(s.translate(identitytab, "x").__class__ is str)
vereq(s.translate(identitytab, "x"), base)
vereq(s.translate(identitytab, "\x00"), "")
verify(s.replace("x", "x").__class__ is str)
vereq(s.replace("x", "x"), base)
verify(s.ljust(len(s)).__class__ is str)
vereq(s.ljust(len(s)), base)
verify(s.rjust(len(s)).__class__ is str)
vereq(s.rjust(len(s)), base)
verify(s.center(len(s)).__class__ is str)
vereq(s.center(len(s)), base)
verify(s.lower().__class__ is str)
vereq(s.lower(), base)
class madunicode(unicode):
_rev = None
def rev(self):
if self._rev is not None:
return self._rev
L = list(self)
L.reverse()
self._rev = self.__class__(u"".join(L))
return self._rev
u = madunicode("ABCDEF")
vereq(u, u"ABCDEF")
vereq(u.rev(), madunicode(u"FEDCBA"))
vereq(u.rev().rev(), madunicode(u"ABCDEF"))
base = u"12345"
u = madunicode(base)
vereq(unicode(u), base)
verify(unicode(u).__class__ is unicode)
vereq(hash(u), hash(base))
vereq({u: 1}[base], 1)
vereq({base: 1}[u], 1)
verify(u.strip().__class__ is unicode)
vereq(u.strip(), base)
verify(u.lstrip().__class__ is unicode)
vereq(u.lstrip(), base)
verify(u.rstrip().__class__ is unicode)
vereq(u.rstrip(), base)
verify(u.replace(u"x", u"x").__class__ is unicode)
vereq(u.replace(u"x", u"x"), base)
verify(u.replace(u"xy", u"xy").__class__ is unicode)
vereq(u.replace(u"xy", u"xy"), base)
verify(u.center(len(u)).__class__ is unicode)
vereq(u.center(len(u)), base)
verify(u.ljust(len(u)).__class__ is unicode)
vereq(u.ljust(len(u)), base)
verify(u.rjust(len(u)).__class__ is unicode)
vereq(u.rjust(len(u)), base)
verify(u.lower().__class__ is unicode)
vereq(u.lower(), base)
verify(u.upper().__class__ is unicode)
vereq(u.upper(), base)
verify(u.capitalize().__class__ is unicode)
vereq(u.capitalize(), base)
verify(u.title().__class__ is unicode)
vereq(u.title(), base)
verify((u + u"").__class__ is unicode)
vereq(u + u"", base)
verify((u"" + u).__class__ is unicode)
vereq(u"" + u, base)
verify((u * 0).__class__ is unicode)
vereq(u * 0, u"")
verify((u * 1).__class__ is unicode)
vereq(u * 1, base)
verify((u * 2).__class__ is unicode)
vereq(u * 2, base + base)
verify(u[:].__class__ is unicode)
vereq(u[:], base)
verify(u[0:0].__class__ is unicode)
vereq(u[0:0], u"")
class sublist(list):
pass
a = sublist(range(5))
vereq(a, range(5))
a.append("hello")
vereq(a, range(5) + ["hello"])
a[5] = 5
vereq(a, range(6))
a.extend(range(6, 20))
vereq(a, range(20))
a[-5:] = []
vereq(a, range(15))
del a[10:15]
vereq(len(a), 10)
vereq(a, range(10))
vereq(list(a), range(10))
vereq(a[0], 0)
vereq(a[9], 9)
vereq(a[-10], 0)
vereq(a[-1], 9)
vereq(a[:5], range(5))
class CountedInput(file):
"""Counts lines read by self.readline().
self.lineno is the 0-based ordinal of the last line read, up to
a maximum of one greater than the number of lines in the file.
self.ateof is true if and only if the final "" line has been read,
at which point self.lineno stops incrementing, and further calls
to readline() continue to return "".
"""
lineno = 0
ateof = 0
def readline(self):
if self.ateof:
return ""
s = file.readline(self)
# Next line works too.
# s = super(CountedInput, self).readline()
self.lineno += 1
if s == "":
self.ateof = 1
return s
f = file(name=TESTFN, mode='w')
lines = ['a\n', 'b\n', 'c\n']
try:
f.writelines(lines)
f.close()
f = CountedInput(TESTFN)
for (i, expected) in zip(range(1, 5) + [4], lines + 2 * [""]):
got = f.readline()
vereq(expected, got)
vereq(f.lineno, i)
vereq(f.ateof, (i > len(lines)))
f.close()
finally:
try:
f.close()
except:
pass
try:
import os
os.unlink(TESTFN)
except:
pass
def keywords():
if verbose:
print "Testing keyword args to basic type constructors ..."
vereq(int(x=1), 1)
vereq(float(x=2), 2.0)
vereq(long(x=3), 3L)
vereq(complex(imag=42, real=666), complex(666, 42))
vereq(str(object=500), '500')
vereq(unicode(string='abc', errors='strict'), u'abc')
vereq(tuple(sequence=range(3)), (0, 1, 2))
vereq(list(sequence=(0, 1, 2)), range(3))
# note: as of Python 2.3, dict() no longer has an "items" keyword arg
for constructor in (int, float, long, complex, str, unicode,
tuple, list, file):
try:
constructor(bogus_keyword_arg=1)
except TypeError:
pass
else:
raise TestFailed("expected TypeError from bogus keyword "
"argument to %r" % constructor)
def restricted():
# XXX This test is disabled because rexec is not deemed safe
return
import rexec
if verbose:
print "Testing interaction with restricted execution ..."
sandbox = rexec.RExec()
code1 = """f = open(%r, 'w')""" % TESTFN
code2 = """f = file(%r, 'w')""" % TESTFN
code3 = """\
f = open(%r)
t = type(f) # a sneaky way to get the file() constructor
f.close()
f = t(%r, 'w') # rexec can't catch this by itself
""" % (TESTFN, TESTFN)
f = open(TESTFN, 'w') # Create the file so code3 can find it.
f.close()
try:
for code in code1, code2, code3:
try:
sandbox.r_exec(code)
except IOError, msg:
if str(msg).find("restricted") >= 0:
outcome = "OK"
else:
outcome = "got an exception, but not an expected one"
else:
outcome = "expected a restricted-execution exception"
if outcome != "OK":
raise TestFailed("%s, in %r" % (outcome, code))
finally:
try:
import os
os.unlink(TESTFN)
except:
pass
def str_subclass_as_dict_key():
if verbose:
print "Testing a str subclass used as dict key .."
class cistr(str):
"""Sublcass of str that computes __eq__ case-insensitively.
Also computes a hash code of the string in canonical form.
"""
def __init__(self, value):
self.canonical = value.lower()
self.hashcode = hash(self.canonical)
def __eq__(self, other):
if not isinstance(other, cistr):
other = cistr(other)
return self.canonical == other.canonical
def __hash__(self):
return self.hashcode
vereq(cistr('ABC'), 'abc')
vereq('aBc', cistr('ABC'))
vereq(str(cistr('ABC')), 'ABC')
d = {cistr('one'): 1, cistr('two'): 2, cistr('tHree'): 3}
vereq(d[cistr('one')], 1)
vereq(d[cistr('tWo')], 2)
vereq(d[cistr('THrEE')], 3)
verify(cistr('ONe') in d)
vereq(d.get(cistr('thrEE')), 3)
def classic_comparisons():
if verbose: print "Testing classic comparisons..."
class classic:
pass
for base in (classic, int, object):
if verbose: print " (base = %s)" % base
class C(base):
def __init__(self, value):
self.value = int(value)
def __cmp__(self, other):
if isinstance(other, C):
return cmp(self.value, other.value)
if isinstance(other, int) or isinstance(other, long):
return cmp(self.value, other)
return NotImplemented
c1 = C(1)
c2 = C(2)
c3 = C(3)
vereq(c1, 1)
c = {1: c1, 2: c2, 3: c3}
for x in 1, 2, 3:
for y in 1, 2, 3:
verify(cmp(c[x], c[y]) == cmp(x, y), "x=%d, y=%d" % (x, y))
for op in "<", "<=", "==", "!=", ">", ">=":
verify(eval("c[x] %s c[y]" % op) == eval("x %s y" % op),
"x=%d, y=%d" % (x, y))
verify(cmp(c[x], y) == cmp(x, y), "x=%d, y=%d" % (x, y))
verify(cmp(x, c[y]) == cmp(x, y), "x=%d, y=%d" % (x, y))
def rich_comparisons():
if verbose:
print "Testing rich comparisons..."
class Z(complex):
pass
z = Z(1)
vereq(z, 1+0j)
vereq(1+0j, z)
class ZZ(complex):
def __eq__(self, other):
try:
return abs(self - other) <= 1e-6
except:
return NotImplemented
zz = ZZ(1.0000003)
vereq(zz, 1+0j)
vereq(1+0j, zz)
class classic:
pass
for base in (classic, int, object, list):
if verbose: print " (base = %s)" % base
class C(base):
def __init__(self, value):
self.value = int(value)
def __cmp__(self, other):
raise TestFailed, "shouldn't call __cmp__"
def __eq__(self, other):
if isinstance(other, C):
return self.value == other.value
if isinstance(other, int) or isinstance(other, long):
return self.value == other
return NotImplemented
def __ne__(self, other):
if isinstance(other, C):
return self.value != other.value
if isinstance(other, int) or isinstance(other, long):
return self.value != other
return NotImplemented
def __lt__(self, other):
if isinstance(other, C):
return self.value < other.value
if isinstance(other, int) or isinstance(other, long):
return self.value < other
return NotImplemented
def __le__(self, other):
if isinstance(other, C):
return self.value <= other.value
if isinstance(other, int) or isinstance(other, long):
return self.value <= other
return NotImplemented
def __gt__(self, other):
if isinstance(other, C):
return self.value > other.value
if isinstance(other, int) or isinstance(other, long):
return self.value > other
return NotImplemented
def __ge__(self, other):
if isinstance(other, C):
return self.value >= other.value
if isinstance(other, int) or isinstance(other, long):
return self.value >= other
return NotImplemented
c1 = C(1)
c2 = C(2)
c3 = C(3)
vereq(c1, 1)
c = {1: c1, 2: c2, 3: c3}
for x in 1, 2, 3:
for y in 1, 2, 3:
for op in "<", "<=", "==", "!=", ">", ">=":
verify(eval("c[x] %s c[y]" % op) == eval("x %s y" % op),
"x=%d, y=%d" % (x, y))
verify(eval("c[x] %s y" % op) == eval("x %s y" % op),
"x=%d, y=%d" % (x, y))
verify(eval("x %s c[y]" % op) == eval("x %s y" % op),
"x=%d, y=%d" % (x, y))
def coercions():
if verbose: print "Testing coercions..."
class I(int): pass
coerce(I(0), 0)
coerce(0, I(0))
class L(long): pass
coerce(L(0), 0)
coerce(L(0), 0L)
coerce(0, L(0))
coerce(0L, L(0))
class F(float): pass
coerce(F(0), 0)
coerce(F(0), 0L)
coerce(F(0), 0.)
coerce(0, F(0))
coerce(0L, F(0))
coerce(0., F(0))
class C(complex): pass
coerce(C(0), 0)
coerce(C(0), 0L)
coerce(C(0), 0.)
coerce(C(0), 0j)
coerce(0, C(0))
coerce(0L, C(0))
coerce(0., C(0))
coerce(0j, C(0))
def descrdoc():
if verbose: print "Testing descriptor doc strings..."
def check(descr, what):
vereq(descr.__doc__, what)
check(file.closed, "True if the file is closed") # getset descriptor
check(file.name, "file name") # member descriptor
def setclass():
if verbose: print "Testing __class__ assignment..."
class C(object): pass
class D(object): pass
class E(object): pass
class F(D, E): pass
for cls in C, D, E, F:
for cls2 in C, D, E, F:
x = cls()
x.__class__ = cls2
verify(x.__class__ is cls2)
x.__class__ = cls
verify(x.__class__ is cls)
def cant(x, C):
try:
x.__class__ = C
except TypeError:
pass
else:
raise TestFailed, "shouldn't allow %r.__class__ = %r" % (x, C)
try:
delattr(x, "__class__")
except TypeError:
pass
else:
raise TestFailed, "shouldn't allow del %r.__class__" % x
cant(C(), list)
cant(list(), C)
cant(C(), 1)
cant(C(), object)
cant(object(), list)
cant(list(), object)
class Int(int): __slots__ = []
cant(2, Int)
cant(Int(), int)
cant(True, int)
cant(2, bool)
o = object()
cant(o, type(1))
cant(o, type(None))
del o
class G(object):
__slots__ = ["a", "b"]
class H(object):
__slots__ = ["b", "a"]
try:
unicode
except NameError:
class I(object):
__slots__ = ["a", "b"]
else:
class I(object):
__slots__ = [unicode("a"), unicode("b")]
class J(object):
__slots__ = ["c", "b"]
class K(object):
__slots__ = ["a", "b", "d"]
class L(H):
__slots__ = ["e"]
class M(I):
__slots__ = ["e"]
class N(J):
__slots__ = ["__weakref__"]
class P(J):
__slots__ = ["__dict__"]
class Q(J):
pass
class R(J):
__slots__ = ["__dict__", "__weakref__"]
for cls, cls2 in ((G, H), (G, I), (I, H), (Q, R), (R, Q)):
x = cls()
x.a = 1
x.__class__ = cls2
verify(x.__class__ is cls2,
"assigning %r as __class__ for %r silently failed" % (cls2, x))
vereq(x.a, 1)
x.__class__ = cls
verify(x.__class__ is cls,
"assigning %r as __class__ for %r silently failed" % (cls, x))
vereq(x.a, 1)
for cls in G, J, K, L, M, N, P, R, list, Int:
for cls2 in G, J, K, L, M, N, P, R, list, Int:
if cls is cls2:
continue
cant(cls(), cls2)
def setdict():
if verbose: print "Testing __dict__ assignment..."
class C(object): pass
a = C()
a.__dict__ = {'b': 1}
vereq(a.b, 1)
def cant(x, dict):
try:
x.__dict__ = dict
except (AttributeError, TypeError):
pass
else:
raise TestFailed, "shouldn't allow %r.__dict__ = %r" % (x, dict)
cant(a, None)
cant(a, [])
cant(a, 1)
del a.__dict__ # Deleting __dict__ is allowed
# Classes don't allow __dict__ assignment
cant(C, {})
def pickles():
if verbose:
print "Testing pickling and copying new-style classes and objects..."
import pickle, cPickle
def sorteditems(d):
L = d.items()
L.sort()
return L
global C
class C(object):
def __init__(self, a, b):
super(C, self).__init__()
self.a = a
self.b = b
def __repr__(self):
return "C(%r, %r)" % (self.a, self.b)
global C1
class C1(list):
def __new__(cls, a, b):
return super(C1, cls).__new__(cls)
def __getnewargs__(self):
return (self.a, self.b)
def __init__(self, a, b):
self.a = a
self.b = b
def __repr__(self):
return "C1(%r, %r)<%r>" % (self.a, self.b, list(self))
global C2
class C2(int):
def __new__(cls, a, b, val=0):
return super(C2, cls).__new__(cls, val)
def __getnewargs__(self):
return (self.a, self.b, int(self))
def __init__(self, a, b, val=0):
self.a = a
self.b = b
def __repr__(self):
return "C2(%r, %r)<%r>" % (self.a, self.b, int(self))
global C3
class C3(object):
def __init__(self, foo):
self.foo = foo
def __getstate__(self):
return self.foo
def __setstate__(self, foo):
self.foo = foo
global C4classic, C4
class C4classic: # classic
pass
class C4(C4classic, object): # mixed inheritance
pass
for p in pickle, cPickle:
for bin in 0, 1:
if verbose:
print p.__name__, ["text", "binary"][bin]
for cls in C, C1, C2:
s = p.dumps(cls, bin)
cls2 = p.loads(s)
verify(cls2 is cls)
a = C1(1, 2); a.append(42); a.append(24)
b = C2("hello", "world", 42)
s = p.dumps((a, b), bin)
x, y = p.loads(s)
vereq(x.__class__, a.__class__)
vereq(sorteditems(x.__dict__), sorteditems(a.__dict__))
vereq(y.__class__, b.__class__)
vereq(sorteditems(y.__dict__), sorteditems(b.__dict__))
vereq(repr(x), repr(a))
vereq(repr(y), repr(b))
if verbose:
print "a = x =", a
print "b = y =", b
# Test for __getstate__ and __setstate__ on new style class
u = C3(42)
s = p.dumps(u, bin)
v = p.loads(s)
veris(u.__class__, v.__class__)
vereq(u.foo, v.foo)
# Test for picklability of hybrid class
u = C4()
u.foo = 42
s = p.dumps(u, bin)
v = p.loads(s)
veris(u.__class__, v.__class__)
vereq(u.foo, v.foo)
# Testing copy.deepcopy()
if verbose:
print "deepcopy"
import copy
for cls in C, C1, C2:
cls2 = copy.deepcopy(cls)
verify(cls2 is cls)
a = C1(1, 2); a.append(42); a.append(24)
b = C2("hello", "world", 42)
x, y = copy.deepcopy((a, b))
vereq(x.__class__, a.__class__)
vereq(sorteditems(x.__dict__), sorteditems(a.__dict__))
vereq(y.__class__, b.__class__)
vereq(sorteditems(y.__dict__), sorteditems(b.__dict__))
vereq(repr(x), repr(a))
vereq(repr(y), repr(b))
if verbose:
print "a = x =", a
print "b = y =", b
def pickleslots():
if verbose: print "Testing pickling of classes with __slots__ ..."
import pickle, cPickle
# Pickling of classes with __slots__ but without __getstate__ should fail
global B, C, D, E
class B(object):
pass
for base in [object, B]:
class C(base):
__slots__ = ['a']
class D(C):
pass
try:
pickle.dumps(C())
except TypeError:
pass
else:
raise TestFailed, "should fail: pickle C instance - %s" % base
try:
cPickle.dumps(C())
except TypeError:
pass
else:
raise TestFailed, "should fail: cPickle C instance - %s" % base
try:
pickle.dumps(C())
except TypeError:
pass
else:
raise TestFailed, "should fail: pickle D instance - %s" % base
try:
cPickle.dumps(D())
except TypeError:
pass
else:
raise TestFailed, "should fail: cPickle D instance - %s" % base
# Give C a nice generic __getstate__ and __setstate__
class C(base):
__slots__ = ['a']
def __getstate__(self):
try:
d = self.__dict__.copy()
except AttributeError:
d = {}
for cls in self.__class__.__mro__:
for sn in cls.__dict__.get('__slots__', ()):
try:
d[sn] = getattr(self, sn)
except AttributeError:
pass
return d
def __setstate__(self, d):
for k, v in d.items():
setattr(self, k, v)
class D(C):
pass
# Now it should work
x = C()
y = pickle.loads(pickle.dumps(x))
vereq(hasattr(y, 'a'), 0)
y = cPickle.loads(cPickle.dumps(x))
vereq(hasattr(y, 'a'), 0)
x.a = 42
y = pickle.loads(pickle.dumps(x))
vereq(y.a, 42)
y = cPickle.loads(cPickle.dumps(x))
vereq(y.a, 42)
x = D()
x.a = 42
x.b = 100
y = pickle.loads(pickle.dumps(x))
vereq(y.a + y.b, 142)
y = cPickle.loads(cPickle.dumps(x))
vereq(y.a + y.b, 142)
# A subclass that adds a slot should also work
class E(C):
__slots__ = ['b']
x = E()
x.a = 42
x.b = "foo"
y = pickle.loads(pickle.dumps(x))
vereq(y.a, x.a)
vereq(y.b, x.b)
y = cPickle.loads(cPickle.dumps(x))
vereq(y.a, x.a)
vereq(y.b, x.b)
def copies():
if verbose: print "Testing copy.copy() and copy.deepcopy()..."
import copy
class C(object):
pass
a = C()
a.foo = 12
b = copy.copy(a)
vereq(b.__dict__, a.__dict__)
a.bar = [1,2,3]
c = copy.copy(a)
vereq(c.bar, a.bar)
verify(c.bar is a.bar)
d = copy.deepcopy(a)
vereq(d.__dict__, a.__dict__)
a.bar.append(4)
vereq(d.bar, [1,2,3])
def binopoverride():
if verbose: print "Testing overrides of binary operations..."
class I(int):
def __repr__(self):
return "I(%r)" % int(self)
def __add__(self, other):
return I(int(self) + int(other))
__radd__ = __add__
def __pow__(self, other, mod=None):
if mod is None:
return I(pow(int(self), int(other)))
else:
return I(pow(int(self), int(other), int(mod)))
def __rpow__(self, other, mod=None):
if mod is None:
return I(pow(int(other), int(self), mod))
else:
return I(pow(int(other), int(self), int(mod)))
vereq(repr(I(1) + I(2)), "I(3)")
vereq(repr(I(1) + 2), "I(3)")
vereq(repr(1 + I(2)), "I(3)")
vereq(repr(I(2) ** I(3)), "I(8)")
vereq(repr(2 ** I(3)), "I(8)")
vereq(repr(I(2) ** 3), "I(8)")
vereq(repr(pow(I(2), I(3), I(5))), "I(3)")
class S(str):
def __eq__(self, other):
return self.lower() == other.lower()
def subclasspropagation():
if verbose: print "Testing propagation of slot functions to subclasses..."
class A(object):
pass
class B(A):
pass
class C(A):
pass
class D(B, C):
pass
d = D()
orig_hash = hash(d) # related to id(d) in platform-dependent ways
A.__hash__ = lambda self: 42
vereq(hash(d), 42)
C.__hash__ = lambda self: 314
vereq(hash(d), 314)
B.__hash__ = lambda self: 144
vereq(hash(d), 144)
D.__hash__ = lambda self: 100
vereq(hash(d), 100)
del D.__hash__
vereq(hash(d), 144)
del B.__hash__
vereq(hash(d), 314)
del C.__hash__
vereq(hash(d), 42)
del A.__hash__
vereq(hash(d), orig_hash)
d.foo = 42
d.bar = 42
vereq(d.foo, 42)
vereq(d.bar, 42)
def __getattribute__(self, name):
if name == "foo":
return 24
return object.__getattribute__(self, name)
A.__getattribute__ = __getattribute__
vereq(d.foo, 24)
vereq(d.bar, 42)
def __getattr__(self, name):
if name in ("spam", "foo", "bar"):
return "hello"
raise AttributeError, name
B.__getattr__ = __getattr__
vereq(d.spam, "hello")
vereq(d.foo, 24)
vereq(d.bar, 42)
del A.__getattribute__
vereq(d.foo, 42)
del d.foo
vereq(d.foo, "hello")
vereq(d.bar, 42)
del B.__getattr__
try:
d.foo
except AttributeError:
pass
else:
raise TestFailed, "d.foo should be undefined now"
# Test a nasty bug in recurse_down_subclasses()
import gc
class A(object):
pass
class B(A):
pass
del B
gc.collect()
A.__setitem__ = lambda *a: None # crash
def buffer_inherit():
import binascii
# SF bug [#470040] ParseTuple t# vs subclasses.
if verbose:
print "Testing that buffer interface is inherited ..."
class MyStr(str):
pass
base = 'abc'
m = MyStr(base)
# b2a_hex uses the buffer interface to get its argument's value, via
# PyArg_ParseTuple 't#' code.
vereq(binascii.b2a_hex(m), binascii.b2a_hex(base))
# It's not clear that unicode will continue to support the character
# buffer interface, and this test will fail if that's taken away.
class MyUni(unicode):
pass
base = u'abc'
m = MyUni(base)
vereq(binascii.b2a_hex(m), binascii.b2a_hex(base))
class MyInt(int):
pass
m = MyInt(42)
try:
binascii.b2a_hex(m)
raise TestFailed('subclass of int should not have a buffer interface')
except TypeError:
pass
def str_of_str_subclass():
import binascii
import cStringIO
if verbose:
print "Testing __str__ defined in subclass of str ..."
class octetstring(str):
def __str__(self):
return binascii.b2a_hex(self)
def __repr__(self):
return self + " repr"
o = octetstring('A')
vereq(type(o), octetstring)
vereq(type(str(o)), str)
vereq(type(repr(o)), str)
vereq(ord(o), 0x41)
vereq(str(o), '41')
vereq(repr(o), 'A repr')
vereq(o.__str__(), '41')
vereq(o.__repr__(), 'A repr')
capture = cStringIO.StringIO()
# Calling str() or not exercises different internal paths.
print >> capture, o
print >> capture, str(o)
vereq(capture.getvalue(), '41\n41\n')
capture.close()
def kwdargs():
if verbose: print "Testing keyword arguments to __init__, __call__..."
def f(a): return a
vereq(f.__call__(a=42), 42)
a = []
list.__init__(a, sequence=[0, 1, 2])
vereq(a, [0, 1, 2])
def recursive__call__():
if verbose: print ("Testing recursive __call__() by setting to instance of "
"class ...")
class A(object):
pass
A.__call__ = A()
try:
A()()
except RuntimeError:
pass
else:
raise TestFailed("Recursion limit should have been reached for "
"__call__()")
def delhook():
if verbose: print "Testing __del__ hook..."
log = []
class C(object):
def __del__(self):
log.append(1)
c = C()
vereq(log, [])
del c
vereq(log, [1])
class D(object): pass
d = D()
try: del d[0]
except TypeError: pass
else: raise TestFailed, "invalid del() didn't raise TypeError"
def hashinherit():
if verbose: print "Testing hash of mutable subclasses..."
class mydict(dict):
pass
d = mydict()
try:
hash(d)
except TypeError:
pass
else:
raise TestFailed, "hash() of dict subclass should fail"
class mylist(list):
pass
d = mylist()
try:
hash(d)
except TypeError:
pass
else:
raise TestFailed, "hash() of list subclass should fail"
def strops():
try: 'a' + 5
except TypeError: pass
else: raise TestFailed, "'' + 5 doesn't raise TypeError"
try: ''.split('')
except ValueError: pass
else: raise TestFailed, "''.split('') doesn't raise ValueError"
try: ''.join([0])
except TypeError: pass
else: raise TestFailed, "''.join([0]) doesn't raise TypeError"
try: ''.rindex('5')
except ValueError: pass
else: raise TestFailed, "''.rindex('5') doesn't raise ValueError"
try: '%(n)s' % None
except TypeError: pass
else: raise TestFailed, "'%(n)s' % None doesn't raise TypeError"
try: '%(n' % {}
except ValueError: pass
else: raise TestFailed, "'%(n' % {} '' doesn't raise ValueError"
try: '%*s' % ('abc')
except TypeError: pass
else: raise TestFailed, "'%*s' % ('abc') doesn't raise TypeError"
try: '%*.*s' % ('abc', 5)
except TypeError: pass
else: raise TestFailed, "'%*.*s' % ('abc', 5) doesn't raise TypeError"
try: '%s' % (1, 2)
except TypeError: pass
else: raise TestFailed, "'%s' % (1, 2) doesn't raise TypeError"
try: '%' % None
except ValueError: pass
else: raise TestFailed, "'%' % None doesn't raise ValueError"
vereq('534253'.isdigit(), 1)
vereq('534253x'.isdigit(), 0)
vereq('%c' % 5, '\x05')
vereq('%c' % '5', '5')
def deepcopyrecursive():
if verbose: print "Testing deepcopy of recursive objects..."
class Node:
pass
a = Node()
b = Node()
a.b = b
b.a = a
z = deepcopy(a) # This blew up before
def modules():
if verbose: print "Testing uninitialized module objects..."
from types import ModuleType as M
m = M.__new__(M)
str(m)
vereq(hasattr(m, "__name__"), 0)
vereq(hasattr(m, "__file__"), 0)
vereq(hasattr(m, "foo"), 0)
vereq(m.__dict__, None)
m.foo = 1
vereq(m.__dict__, {"foo": 1})
def dictproxyiterkeys():
class C(object):
def meth(self):
pass
if verbose: print "Testing dict-proxy iterkeys..."
keys = [ key for key in C.__dict__.iterkeys() ]
keys.sort()
vereq(keys, ['__dict__', '__doc__', '__module__', '__weakref__', 'meth'])
def dictproxyitervalues():
class C(object):
def meth(self):
pass
if verbose: print "Testing dict-proxy itervalues..."
values = [ values for values in C.__dict__.itervalues() ]
vereq(len(values), 5)
def dictproxyiteritems():
class C(object):
def meth(self):
pass
if verbose: print "Testing dict-proxy iteritems..."
keys = [ key for (key, value) in C.__dict__.iteritems() ]
keys.sort()
vereq(keys, ['__dict__', '__doc__', '__module__', '__weakref__', 'meth'])
def funnynew():
if verbose: print "Testing __new__ returning something unexpected..."
class C(object):
def __new__(cls, arg):
if isinstance(arg, str): return [1, 2, 3]
elif isinstance(arg, int): return object.__new__(D)
else: return object.__new__(cls)
class D(C):
def __init__(self, arg):
self.foo = arg
vereq(C("1"), [1, 2, 3])
vereq(D("1"), [1, 2, 3])
d = D(None)
veris(d.foo, None)
d = C(1)
vereq(isinstance(d, D), True)
vereq(d.foo, 1)
d = D(1)
vereq(isinstance(d, D), True)
vereq(d.foo, 1)
def imulbug():
# SF bug 544647
if verbose: print "Testing for __imul__ problems..."
class C(object):
def __imul__(self, other):
return (self, other)
x = C()
y = x
y *= 1.0
vereq(y, (x, 1.0))
y = x
y *= 2
vereq(y, (x, 2))
y = x
y *= 3L
vereq(y, (x, 3L))
y = x
y *= 1L<<100
vereq(y, (x, 1L<<100))
y = x
y *= None
vereq(y, (x, None))
y = x
y *= "foo"
vereq(y, (x, "foo"))
def docdescriptor():
# SF bug 542984
if verbose: print "Testing __doc__ descriptor..."
class DocDescr(object):
def __get__(self, object, otype):
if object:
object = object.__class__.__name__ + ' instance'
if otype:
otype = otype.__name__
return 'object=%s; type=%s' % (object, otype)
class OldClass:
__doc__ = DocDescr()
class NewClass(object):
__doc__ = DocDescr()
vereq(OldClass.__doc__, 'object=None; type=OldClass')
vereq(OldClass().__doc__, 'object=OldClass instance; type=OldClass')
vereq(NewClass.__doc__, 'object=None; type=NewClass')
vereq(NewClass().__doc__, 'object=NewClass instance; type=NewClass')
def copy_setstate():
if verbose:
print "Testing that copy.*copy() correctly uses __setstate__..."
import copy
class C(object):
def __init__(self, foo=None):
self.foo = foo
self.__foo = foo
def setfoo(self, foo=None):
self.foo = foo
def getfoo(self):
return self.__foo
def __getstate__(self):
return [self.foo]
def __setstate__(self, lst):
assert len(lst) == 1
self.__foo = self.foo = lst[0]
a = C(42)
a.setfoo(24)
vereq(a.foo, 24)
vereq(a.getfoo(), 42)
b = copy.copy(a)
vereq(b.foo, 24)
vereq(b.getfoo(), 24)
b = copy.deepcopy(a)
vereq(b.foo, 24)
vereq(b.getfoo(), 24)
def slices():
if verbose:
print "Testing cases with slices and overridden __getitem__ ..."
# Strings
vereq("hello"[:4], "hell")
vereq("hello"[slice(4)], "hell")
vereq(str.__getitem__("hello", slice(4)), "hell")
class S(str):
def __getitem__(self, x):
return str.__getitem__(self, x)
vereq(S("hello")[:4], "hell")
vereq(S("hello")[slice(4)], "hell")
vereq(S("hello").__getitem__(slice(4)), "hell")
# Tuples
vereq((1,2,3)[:2], (1,2))
vereq((1,2,3)[slice(2)], (1,2))
vereq(tuple.__getitem__((1,2,3), slice(2)), (1,2))
class T(tuple):
def __getitem__(self, x):
return tuple.__getitem__(self, x)
vereq(T((1,2,3))[:2], (1,2))
vereq(T((1,2,3))[slice(2)], (1,2))
vereq(T((1,2,3)).__getitem__(slice(2)), (1,2))
# Lists
vereq([1,2,3][:2], [1,2])
vereq([1,2,3][slice(2)], [1,2])
vereq(list.__getitem__([1,2,3], slice(2)), [1,2])
class L(list):
def __getitem__(self, x):
return list.__getitem__(self, x)
vereq(L([1,2,3])[:2], [1,2])
vereq(L([1,2,3])[slice(2)], [1,2])
vereq(L([1,2,3]).__getitem__(slice(2)), [1,2])
# Now do lists and __setitem__
a = L([1,2,3])
a[slice(1, 3)] = [3,2]
vereq(a, [1,3,2])
a[slice(0, 2, 1)] = [3,1]
vereq(a, [3,1,2])
a.__setitem__(slice(1, 3), [2,1])
vereq(a, [3,2,1])
a.__setitem__(slice(0, 2, 1), [2,3])
vereq(a, [2,3,1])
def subtype_resurrection():
if verbose:
print "Testing resurrection of new-style instance..."
class C(object):
container = []
def __del__(self):
# resurrect the instance
C.container.append(self)
c = C()
c.attr = 42
# The most interesting thing here is whether this blows up, due to flawed
# GC tracking logic in typeobject.c's call_finalizer() (a 2.2.1 bug).
del c
# If that didn't blow up, it's also interesting to see whether clearing
# the last container slot works: that will attempt to delete c again,
# which will cause c to get appended back to the container again "during"
# the del.
del C.container[-1]
vereq(len(C.container), 1)
vereq(C.container[-1].attr, 42)
# Make c mortal again, so that the test framework with -l doesn't report
# it as a leak.
del C.__del__
def slottrash():
# Deallocating deeply nested slotted trash caused stack overflows
if verbose:
print "Testing slot trash..."
class trash(object):
__slots__ = ['x']
def __init__(self, x):
self.x = x
o = None
for i in xrange(50000):
o = trash(o)
del o
def slotmultipleinheritance():
# SF bug 575229, multiple inheritance w/ slots dumps core
class A(object):
__slots__=()
class B(object):
pass
class C(A,B) :
__slots__=()
vereq(C.__basicsize__, B.__basicsize__)
verify(hasattr(C, '__dict__'))
verify(hasattr(C, '__weakref__'))
C().x = 2
def testrmul():
# SF patch 592646
if verbose:
print "Testing correct invocation of __rmul__..."
class C(object):
def __mul__(self, other):
return "mul"
def __rmul__(self, other):
return "rmul"
a = C()
vereq(a*2, "mul")
vereq(a*2.2, "mul")
vereq(2*a, "rmul")
vereq(2.2*a, "rmul")
def testipow():
# [SF bug 620179]
if verbose:
print "Testing correct invocation of __ipow__..."
class C(object):
def __ipow__(self, other):
pass
a = C()
a **= 2
def do_this_first():
if verbose:
print "Testing SF bug 551412 ..."
# This dumps core when SF bug 551412 isn't fixed --
# but only when test_descr.py is run separately.
# (That can't be helped -- as soon as PyType_Ready()
# is called for PyLong_Type, the bug is gone.)
class UserLong(object):
def __pow__(self, *args):
pass
try:
pow(0L, UserLong(), 0L)
except:
pass
if verbose:
print "Testing SF bug 570483..."
# Another segfault only when run early
# (before PyType_Ready(tuple) is called)
type.mro(tuple)
def test_mutable_bases():
if verbose:
print "Testing mutable bases..."
# stuff that should work:
class C(object):
pass
class C2(object):
def __getattribute__(self, attr):
if attr == 'a':
return 2
else:
return super(C2, self).__getattribute__(attr)
def meth(self):
return 1
class D(C):
pass
class E(D):
pass
d = D()
e = E()
D.__bases__ = (C,)
D.__bases__ = (C2,)
vereq(d.meth(), 1)
vereq(e.meth(), 1)
vereq(d.a, 2)
vereq(e.a, 2)
vereq(C2.__subclasses__(), [D])
# stuff that shouldn't:
class L(list):
pass
try:
L.__bases__ = (dict,)
except TypeError:
pass
else:
raise TestFailed, "shouldn't turn list subclass into dict subclass"
try:
list.__bases__ = (dict,)
except TypeError:
pass
else:
raise TestFailed, "shouldn't be able to assign to list.__bases__"
try:
D.__bases__ = (C2, list)
except TypeError:
pass
else:
assert 0, "best_base calculation found wanting"
try:
del D.__bases__
except TypeError:
pass
else:
raise TestFailed, "shouldn't be able to delete .__bases__"
try:
D.__bases__ = ()
except TypeError, msg:
if str(msg) == "a new-style class can't have only classic bases":
raise TestFailed, "wrong error message for .__bases__ = ()"
else:
raise TestFailed, "shouldn't be able to set .__bases__ to ()"
try:
D.__bases__ = (D,)
except TypeError:
pass
else:
# actually, we'll have crashed by here...
raise TestFailed, "shouldn't be able to create inheritance cycles"
try:
D.__bases__ = (C, C)
except TypeError:
pass
else:
raise TestFailed, "didn't detect repeated base classes"
try:
D.__bases__ = (E,)
except TypeError:
pass
else:
raise TestFailed, "shouldn't be able to create inheritance cycles"
# let's throw a classic class into the mix:
class Classic:
def meth2(self):
return 3
D.__bases__ = (C, Classic)
vereq(d.meth2(), 3)
vereq(e.meth2(), 3)
try:
d.a
except AttributeError:
pass
else:
raise TestFailed, "attribute should have vanished"
try:
D.__bases__ = (Classic,)
except TypeError:
pass
else:
raise TestFailed, "new-style class must have a new-style base"
def test_mutable_bases_with_failing_mro():
if verbose:
print "Testing mutable bases with failing mro..."
class WorkOnce(type):
def __new__(self, name, bases, ns):
self.flag = 0
return super(WorkOnce, self).__new__(WorkOnce, name, bases, ns)
def mro(self):
if self.flag > 0:
raise RuntimeError, "bozo"
else:
self.flag += 1
return type.mro(self)
class WorkAlways(type):
def mro(self):
# this is here to make sure that .mro()s aren't called
# with an exception set (which was possible at one point).
# An error message will be printed in a debug build.
# What's a good way to test for this?
return type.mro(self)
class C(object):
pass
class C2(object):
pass
class D(C):
pass
class E(D):
pass
class F(D):
__metaclass__ = WorkOnce
class G(D):
__metaclass__ = WorkAlways
# Immediate subclasses have their mro's adjusted in alphabetical
# order, so E's will get adjusted before adjusting F's fails. We
# check here that E's gets restored.
E_mro_before = E.__mro__
D_mro_before = D.__mro__
try:
D.__bases__ = (C2,)
except RuntimeError:
vereq(E.__mro__, E_mro_before)
vereq(D.__mro__, D_mro_before)
else:
raise TestFailed, "exception not propagated"
def test_mutable_bases_catch_mro_conflict():
if verbose:
print "Testing mutable bases catch mro conflict..."
class A(object):
pass
class B(object):
pass
class C(A, B):
pass
class D(A, B):
pass
class E(C, D):
pass
try:
C.__bases__ = (B, A)
except TypeError:
pass
else:
raise TestFailed, "didn't catch MRO conflict"
def mutable_names():
if verbose:
print "Testing mutable names..."
class C(object):
pass
# C.__module__ could be 'test_descr' or '__main__'
mod = C.__module__
C.__name__ = 'D'
vereq((C.__module__, C.__name__), (mod, 'D'))
C.__name__ = 'D.E'
vereq((C.__module__, C.__name__), (mod, 'D.E'))
def subclass_right_op():
if verbose:
print "Testing correct dispatch of subclass overloading __r<op>__..."
# This code tests various cases where right-dispatch of a subclass
# should be preferred over left-dispatch of a base class.
# Case 1: subclass of int; this tests code in abstract.c::binary_op1()
class B(int):
def __floordiv__(self, other):
return "B.__floordiv__"
def __rfloordiv__(self, other):
return "B.__rfloordiv__"
vereq(B(1) // 1, "B.__floordiv__")
vereq(1 // B(1), "B.__rfloordiv__")
# Case 2: subclass of object; this is just the baseline for case 3
class C(object):
def __floordiv__(self, other):
return "C.__floordiv__"
def __rfloordiv__(self, other):
return "C.__rfloordiv__"
vereq(C() // 1, "C.__floordiv__")
vereq(1 // C(), "C.__rfloordiv__")
# Case 3: subclass of new-style class; here it gets interesting
class D(C):
def __floordiv__(self, other):
return "D.__floordiv__"
def __rfloordiv__(self, other):
return "D.__rfloordiv__"
vereq(D() // C(), "D.__floordiv__")
vereq(C() // D(), "D.__rfloordiv__")
# Case 4: this didn't work right in 2.2.2 and 2.3a1
class E(C):
pass
vereq(E.__rfloordiv__, C.__rfloordiv__)
vereq(E() // 1, "C.__floordiv__")
vereq(1 // E(), "C.__rfloordiv__")
vereq(E() // C(), "C.__floordiv__")
vereq(C() // E(), "C.__floordiv__") # This one would fail
def dict_type_with_metaclass():
if verbose:
print "Testing type of __dict__ when __metaclass__ set..."
class B(object):
pass
class M(type):
pass
class C:
# In 2.3a1, C.__dict__ was a real dict rather than a dict proxy
__metaclass__ = M
veris(type(C.__dict__), type(B.__dict__))
def meth_class_get():
# Full coverage of descrobject.c::classmethod_get()
if verbose:
print "Testing __get__ method of METH_CLASS C methods..."
# Baseline
arg = [1, 2, 3]
res = {1: None, 2: None, 3: None}
vereq(dict.fromkeys(arg), res)
vereq({}.fromkeys(arg), res)
# Now get the descriptor
descr = dict.__dict__["fromkeys"]
# More baseline using the descriptor directly
vereq(descr.__get__(None, dict)(arg), res)
vereq(descr.__get__({})(arg), res)
# Now check various error cases
try:
descr.__get__(None, None)
except TypeError:
pass
else:
raise TestFailed, "shouldn't have allowed descr.__get__(None, None)"
try:
descr.__get__(42)
except TypeError:
pass
else:
raise TestFailed, "shouldn't have allowed descr.__get__(42)"
try:
descr.__get__(None, 42)
except TypeError:
pass
else:
raise TestFailed, "shouldn't have allowed descr.__get__(None, 42)"
try:
descr.__get__(None, int)
except TypeError:
pass
else:
raise TestFailed, "shouldn't have allowed descr.__get__(None, int)"
def isinst_isclass():
if verbose:
print "Testing proxy isinstance() and isclass()..."
class Proxy(object):
def __init__(self, obj):
self.__obj = obj
def __getattribute__(self, name):
if name.startswith("_Proxy__"):
return object.__getattribute__(self, name)
else:
return getattr(self.__obj, name)
# Test with a classic class
class C:
pass
a = C()
pa = Proxy(a)
verify(isinstance(a, C)) # Baseline
verify(isinstance(pa, C)) # Test
# Test with a classic subclass
class D(C):
pass
a = D()
pa = Proxy(a)
verify(isinstance(a, C)) # Baseline
verify(isinstance(pa, C)) # Test
# Test with a new-style class
class C(object):
pass
a = C()
pa = Proxy(a)
verify(isinstance(a, C)) # Baseline
verify(isinstance(pa, C)) # Test
# Test with a new-style subclass
class D(C):
pass
a = D()
pa = Proxy(a)
verify(isinstance(a, C)) # Baseline
verify(isinstance(pa, C)) # Test
def proxysuper():
if verbose:
print "Testing super() for a proxy object..."
class Proxy(object):
def __init__(self, obj):
self.__obj = obj
def __getattribute__(self, name):
if name.startswith("_Proxy__"):
return object.__getattribute__(self, name)
else:
return getattr(self.__obj, name)
class B(object):
def f(self):
return "B.f"
class C(B):
def f(self):
return super(C, self).f() + "->C.f"
obj = C()
p = Proxy(obj)
vereq(C.__dict__["f"](p), "B.f->C.f")
def carloverre():
if verbose:
print "Testing prohibition of Carlo Verre's hack..."
try:
object.__setattr__(str, "foo", 42)
except TypeError:
pass
else:
raise TestFailed, "Carlo Verre __setattr__ suceeded!"
try:
object.__delattr__(str, "lower")
except TypeError:
pass
else:
raise TestFailed, "Carlo Verre __delattr__ succeeded!"
def weakref_segfault():
# SF 742911
if verbose:
print "Testing weakref segfault..."
import weakref
class Provoker:
def __init__(self, referrent):
self.ref = weakref.ref(referrent)
def __del__(self):
x = self.ref()
class Oops(object):
pass
o = Oops()
o.whatever = Provoker(o)
del o
def wrapper_segfault():
# SF 927248: deeply nested wrappers could cause stack overflow
f = lambda:None
for i in xrange(1000000):
f = f.__call__
f = None
# Fix SF #762455, segfault when sys.stdout is changed in getattr
def filefault():
if verbose:
print "Testing sys.stdout is changed in getattr..."
import sys
class StdoutGuard:
def __getattr__(self, attr):
sys.stdout = sys.__stdout__
raise RuntimeError("Premature access to sys.stdout.%s" % attr)
sys.stdout = StdoutGuard()
try:
print "Oops!"
except RuntimeError:
pass
def vicious_descriptor_nonsense():
# A potential segfault spotted by Thomas Wouters in mail to
# python-dev 2003-04-17, turned into an example & fixed by Michael
# Hudson just less than four months later...
if verbose:
print "Testing vicious_descriptor_nonsense..."
class Evil(object):
def __hash__(self):
return hash('attr')
def __eq__(self, other):
del C.attr
return 0
class Descr(object):
def __get__(self, ob, type=None):
return 1
class C(object):
attr = Descr()
c = C()
c.__dict__[Evil()] = 0
vereq(c.attr, 1)
# this makes a crash more likely:
import gc; gc.collect()
vereq(hasattr(c, 'attr'), False)
def test_init():
# SF 1155938
class Foo(object):
def __init__(self):
return 10
try:
Foo()
except TypeError:
pass
else:
raise TestFailed, "did not test __init__() for None return"
def methodwrapper():
# <type 'method-wrapper'> did not support any reflection before 2.5
if verbose:
print "Testing method-wrapper objects..."
l = []
vereq(l.__add__, l.__add__)
vereq(l.__add__, [].__add__)
verify(l.__add__ != [5].__add__)
verify(l.__add__ != l.__mul__)
verify(l.__add__.__name__ == '__add__')
verify(l.__add__.__self__ is l)
verify(l.__add__.__objclass__ is list)
vereq(l.__add__.__doc__, list.__add__.__doc__)
try:
hash(l.__add__)
except TypeError:
pass
else:
raise TestFailed("no TypeError from hash([].__add__)")
t = ()
t += (7,)
vereq(t.__add__, (7,).__add__)
vereq(hash(t.__add__), hash((7,).__add__))
def notimplemented():
# all binary methods should be able to return a NotImplemented
if verbose:
print "Testing NotImplemented..."
import sys
import types
import operator
def specialmethod(self, other):
return NotImplemented
def check(expr, x, y):
try:
exec expr in {'x': x, 'y': y, 'operator': operator}
except TypeError:
pass
else:
raise TestFailed("no TypeError from %r" % (expr,))
N1 = sys.maxint + 1L # might trigger OverflowErrors instead of TypeErrors
N2 = sys.maxint # if sizeof(int) < sizeof(long), might trigger
# ValueErrors instead of TypeErrors
for metaclass in [type, types.ClassType]:
for name, expr, iexpr in [
('__add__', 'x + y', 'x += y'),
('__sub__', 'x - y', 'x -= y'),
('__mul__', 'x * y', 'x *= y'),
('__truediv__', 'operator.truediv(x, y)', None),
('__floordiv__', 'operator.floordiv(x, y)', None),
('__div__', 'x / y', 'x /= y'),
('__mod__', 'x % y', 'x %= y'),
('__divmod__', 'divmod(x, y)', None),
('__pow__', 'x ** y', 'x **= y'),
('__lshift__', 'x << y', 'x <<= y'),
('__rshift__', 'x >> y', 'x >>= y'),
('__and__', 'x & y', 'x &= y'),
('__or__', 'x | y', 'x |= y'),
('__xor__', 'x ^ y', 'x ^= y'),
('__coerce__', 'coerce(x, y)', None)]:
if name == '__coerce__':
rname = name
else:
rname = '__r' + name[2:]
A = metaclass('A', (), {name: specialmethod})
B = metaclass('B', (), {rname: specialmethod})
a = A()
b = B()
check(expr, a, a)
check(expr, a, b)
check(expr, b, a)
check(expr, b, b)
check(expr, a, N1)
check(expr, a, N2)
check(expr, N1, b)
check(expr, N2, b)
if iexpr:
check(iexpr, a, a)
check(iexpr, a, b)
check(iexpr, b, a)
check(iexpr, b, b)
check(iexpr, a, N1)
check(iexpr, a, N2)
iname = '__i' + name[2:]
C = metaclass('C', (), {iname: specialmethod})
c = C()
check(iexpr, c, a)
check(iexpr, c, b)
check(iexpr, c, N1)
check(iexpr, c, N2)
def test_assign_slice():
# ceval.c's assign_slice used to check for
# tp->tp_as_sequence->sq_slice instead of
# tp->tp_as_sequence->sq_ass_slice
class C(object):
def __setslice__(self, start, stop, value):
self.value = value
c = C()
c[1:2] = 3
vereq(c.value, 3)
def test_main():
weakref_segfault() # Must be first, somehow
wrapper_segfault()
do_this_first()
class_docstrings()
lists()
dicts()
dict_constructor()
test_dir()
ints()
longs()
floats()
complexes()
spamlists()
spamdicts()
pydicts()
pylists()
metaclass()
pymods()
multi()
mro_disagreement()
diamond()
ex5()
monotonicity()
consistency_with_epg()
objects()
slots()
slotspecials()
dynamics()
classmethods()
classmethods_in_c()
staticmethods()
staticmethods_in_c()
classic()
compattr()
newslot()
altmro()
overloading()
methods()
specials()
weakrefs()
properties()
supers()
inherits()
keywords()
restricted()
str_subclass_as_dict_key()
classic_comparisons()
rich_comparisons()
coercions()
descrdoc()
setclass()
setdict()
pickles()
copies()
binopoverride()
subclasspropagation()
buffer_inherit()
str_of_str_subclass()
kwdargs()
recursive__call__()
delhook()
hashinherit()
strops()
deepcopyrecursive()
modules()
dictproxyiterkeys()
dictproxyitervalues()
dictproxyiteritems()
pickleslots()
funnynew()
imulbug()
docdescriptor()
copy_setstate()
slices()
subtype_resurrection()
slottrash()
slotmultipleinheritance()
testrmul()
testipow()
test_mutable_bases()
test_mutable_bases_with_failing_mro()
test_mutable_bases_catch_mro_conflict()
mutable_names()
subclass_right_op()
dict_type_with_metaclass()
meth_class_get()
isinst_isclass()
proxysuper()
carloverre()
filefault()
vicious_descriptor_nonsense()
test_init()
methodwrapper()
notimplemented()
test_assign_slice()
from test import test_descr
run_doctest(test_descr, verbosity=True)
if verbose: print "All OK"
if __name__ == "__main__":
test_main()
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