mirror of https://github.com/python/cpython
Merge r60522 from trunk.
This commit is contained in:
Georg Brandl
parent
479a7e7af6
commit
60d1456e69
|
|
@ -1,369 +1,233 @@
|
|||
from test.test_support import verbose, TestFailed, verify
|
||||
from test import test_support
|
||||
import types
|
||||
|
||||
class F:
|
||||
def a(self):
|
||||
pass
|
||||
|
||||
def b():
|
||||
'my docstring'
|
||||
pass
|
||||
|
||||
# __module__ is a special attribute
|
||||
verify(b.__module__ == __name__)
|
||||
verify(verify.__module__ == "test.test_support")
|
||||
|
||||
# setting attributes on functions
|
||||
try:
|
||||
b.publish
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed('expected AttributeError')
|
||||
|
||||
if b.__dict__ != {}:
|
||||
raise TestFailed('expected unassigned func.__dict__ to be {}')
|
||||
|
||||
b.publish = 1
|
||||
if b.publish != 1:
|
||||
raise TestFailed('function attribute not set to expected value')
|
||||
|
||||
docstring = 'its docstring'
|
||||
b.__doc__ = docstring
|
||||
if b.__doc__ != docstring:
|
||||
raise TestFailed('problem with setting __doc__ attribute')
|
||||
|
||||
if 'publish' not in dir(b):
|
||||
raise TestFailed('attribute not in dir()')
|
||||
|
||||
try:
|
||||
del b.__dict__
|
||||
except TypeError: pass
|
||||
else: raise TestFailed('del func.__dict__ expected TypeError')
|
||||
|
||||
b.publish = 1
|
||||
try:
|
||||
b.__dict__ = None
|
||||
except TypeError: pass
|
||||
else: raise TestFailed('func.__dict__ = None expected TypeError')
|
||||
|
||||
d = {'hello': 'world'}
|
||||
b.__dict__ = d
|
||||
if b.__dict__ is not d:
|
||||
raise TestFailed('func.__dict__ assignment to dictionary failed')
|
||||
if b.hello != 'world':
|
||||
raise TestFailed('attribute after func.__dict__ assignment failed')
|
||||
|
||||
f1 = F()
|
||||
f2 = F()
|
||||
|
||||
try:
|
||||
F.a.publish
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed('expected AttributeError')
|
||||
|
||||
try:
|
||||
f1.a.publish
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed('expected AttributeError')
|
||||
|
||||
# In Python 2.1 beta 1, we disallowed setting attributes on unbound methods
|
||||
# (it was already disallowed on bound methods). See the PEP for details.
|
||||
# In Python 3.0 unbound methods are gone.
|
||||
F.a.publish = 1
|
||||
|
||||
if F.a.publish != 1:
|
||||
raise TestFailed('unbound method attribute not set to expected value')
|
||||
|
||||
if f1.a.publish != 1:
|
||||
raise TestFailed('bound method attribute access did not work')
|
||||
|
||||
if f2.a.publish != 1:
|
||||
raise TestFailed('bound method attribute access did not work')
|
||||
|
||||
if 'publish' not in dir(F.a):
|
||||
raise TestFailed('attribute not in dir()')
|
||||
|
||||
try:
|
||||
f1.a.publish = 0
|
||||
except (AttributeError, TypeError): pass
|
||||
else: raise TestFailed('expected AttributeError or TypeError')
|
||||
|
||||
# try setting __dict__
|
||||
F.a.__dict__ = {'one': 11, 'two': 22, 'three': 33}
|
||||
|
||||
if f1.a.two != 22:
|
||||
raise TestFailed('setting __dict__')
|
||||
|
||||
from UserDict import UserDict
|
||||
d = UserDict({'four': 44, 'five': 55})
|
||||
|
||||
try:
|
||||
F.a.__dict__ = d
|
||||
except (AttributeError, TypeError): pass
|
||||
else: raise TestFailed
|
||||
|
||||
if f2.a.one != f1.a.one != F.a.one != 11:
|
||||
raise TestFailed
|
||||
|
||||
# __func__ may not be a Python method!
|
||||
import types
|
||||
F.id = id
|
||||
|
||||
eff = F()
|
||||
eff.id = types.MethodType(id, eff)
|
||||
if eff.id() != id(eff):
|
||||
raise TestFailed
|
||||
|
||||
try:
|
||||
F.id.foo
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
F.id.foo = 12
|
||||
except (AttributeError, TypeError): pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
F.id.foo
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
eff.id.foo
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
eff.id.foo = 12
|
||||
except (AttributeError, TypeError): pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
eff.id.foo
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
# Regression test for a crash in pre-2.1a1
|
||||
def another():
|
||||
pass
|
||||
|
||||
try:
|
||||
del another.__dict__
|
||||
except TypeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
del another.__dict__
|
||||
except TypeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
another.__dict__ = None
|
||||
except TypeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
try:
|
||||
del another.bar
|
||||
except AttributeError: pass
|
||||
else: raise TestFailed
|
||||
|
||||
# This isn't specifically related to function attributes, but it does test a
|
||||
# core dump regression in funcobject.c
|
||||
del another.__defaults__
|
||||
|
||||
def foo():
|
||||
pass
|
||||
|
||||
def bar():
|
||||
pass
|
||||
|
||||
def temp():
|
||||
print(1)
|
||||
|
||||
if foo==bar:
|
||||
raise TestFailed
|
||||
|
||||
d={}
|
||||
d[foo] = 1
|
||||
|
||||
foo.__code__ = temp.__code__
|
||||
|
||||
d[foo]
|
||||
|
||||
# Test all predefined function attributes systematically
|
||||
|
||||
def cantset(obj, name, value, exception=(AttributeError, TypeError)):
|
||||
verify(hasattr(obj, name)) # Otherwise it's probably a typo
|
||||
try:
|
||||
setattr(obj, name, value)
|
||||
except exception:
|
||||
pass
|
||||
else:
|
||||
raise TestFailed("shouldn't be able to set %s to %r" % (name, value))
|
||||
try:
|
||||
delattr(obj, name)
|
||||
except (AttributeError, TypeError):
|
||||
pass
|
||||
else:
|
||||
raise TestFailed("shouldn't be able to del %s" % name)
|
||||
|
||||
def test_func_closure():
|
||||
a = 12
|
||||
def f(): print(a)
|
||||
c = f.__closure__
|
||||
verify(isinstance(c, tuple))
|
||||
verify(len(c) == 1)
|
||||
verify(c[0].__class__.__name__ == "cell") # don't have a type object handy
|
||||
cantset(f, "__closure__", c)
|
||||
|
||||
def test_empty_cell():
|
||||
def f(): print(a)
|
||||
try:
|
||||
f.__closure__[0].cell_contents
|
||||
except ValueError:
|
||||
pass
|
||||
else:
|
||||
raise TestFailed("shouldn't be able to read an empty cell")
|
||||
|
||||
a = 12
|
||||
|
||||
def test_func_doc():
|
||||
def f(): pass
|
||||
verify(f.__doc__ is None)
|
||||
f.__doc__ = "hello"
|
||||
verify(f.__doc__ == "hello")
|
||||
del f.__doc__
|
||||
verify(f.__doc__ is None)
|
||||
|
||||
def test_func_globals():
|
||||
def f(): pass
|
||||
verify(f.__globals__ is globals())
|
||||
cantset(f, "__globals__", globals())
|
||||
|
||||
def test_func_name():
|
||||
def f(): pass
|
||||
verify(f.__name__ == "f")
|
||||
f.__name__ = "g"
|
||||
verify(f.__name__ == "g")
|
||||
cantset(f, "__globals__", 1)
|
||||
cantset(f, "__name__", 1)
|
||||
# test that you can access func.__name__ in restricted mode
|
||||
s = """def f(): pass\nf.__name__"""
|
||||
exec(s, {'__builtins__':{}})
|
||||
|
||||
|
||||
def test_func_code():
|
||||
a = b = 24
|
||||
def f(): pass
|
||||
def g(): print(12)
|
||||
def f1(): print(a)
|
||||
def g1(): print(b)
|
||||
def f2(): print(a, b)
|
||||
verify(type(f.__code__) is types.CodeType)
|
||||
f.__code__ = g.__code__
|
||||
cantset(f, "__code__", None)
|
||||
# can't change the number of free vars
|
||||
cantset(f, "__code__", f1.__code__, exception=ValueError)
|
||||
cantset(f1, "__code__", f.__code__, exception=ValueError)
|
||||
cantset(f1, "__code__", f2.__code__, exception=ValueError)
|
||||
f1.__code__ = g1.__code__
|
||||
|
||||
def test_func_defaults():
|
||||
def f(a, b): return (a, b)
|
||||
verify(f.__defaults__ is None)
|
||||
f.__defaults__ = (1, 2)
|
||||
verify(f.__defaults__ == (1, 2))
|
||||
verify(f(10) == (10, 2))
|
||||
def g(a=1, b=2): return (a, b)
|
||||
verify(g.__defaults__ == (1, 2))
|
||||
del g.__defaults__
|
||||
verify(g.__defaults__ is None)
|
||||
try:
|
||||
g()
|
||||
except TypeError:
|
||||
pass
|
||||
else:
|
||||
raise TestFailed("shouldn't be allowed to call g() w/o defaults")
|
||||
|
||||
def test_func_dict():
|
||||
def f(): pass
|
||||
a = f.__dict__
|
||||
verify(a == {})
|
||||
f.hello = 'world'
|
||||
verify(a == {'hello': 'world'})
|
||||
verify(a is f.__dict__)
|
||||
f.__dict__ = {'world': 'hello'}
|
||||
verify(f.world == "hello")
|
||||
verify(f.__dict__ == {'world': 'hello'})
|
||||
cantset(f, "__dict__", None)
|
||||
|
||||
def test___self__():
|
||||
class C:
|
||||
def foo(self): pass
|
||||
#verify(C.foo.__self__.__class__ is C)
|
||||
verify(C().foo.__self__.__class__ is C)
|
||||
#cantset(C.foo, "__self__.__class__", C)
|
||||
cantset(C().foo, "__self__.__class__", C)
|
||||
|
||||
def test___func__():
|
||||
def foo(self): pass
|
||||
class C:
|
||||
pass
|
||||
C.foo = foo
|
||||
#verify(C.foo.__func__ is foo)
|
||||
verify(C().foo.__func__ is foo)
|
||||
#cantset(C.foo, "__func__", foo)
|
||||
cantset(C().foo, "__func__", foo)
|
||||
|
||||
def test___self__():
|
||||
class C:
|
||||
def foo(self): pass
|
||||
#verify(C.foo.__self__ is None)
|
||||
c = C()
|
||||
#verify(c.foo.__self__ is c)
|
||||
#cantset(C.foo, "__self__", None)
|
||||
#cantset(c.foo, "__self__", c)
|
||||
|
||||
def test_im_dict():
|
||||
class C:
|
||||
def foo(self): pass
|
||||
foo.bar = 42
|
||||
verify(C.foo.__dict__ == {'bar': 42})
|
||||
verify(C().foo.__dict__ == {'bar': 42})
|
||||
#cantset(C.foo, "__dict__", C.foo.__dict__)
|
||||
#cantset(C().foo, "__dict__", C.foo.__dict__)
|
||||
|
||||
def test_im_doc():
|
||||
class C:
|
||||
def foo(self): "hello"
|
||||
verify(C.foo.__doc__ == "hello")
|
||||
verify(C().foo.__doc__ == "hello")
|
||||
#cantset(C.foo, "__doc__", "hello")
|
||||
#cantset(C().foo, "__doc__", "hello")
|
||||
|
||||
def test_im_name():
|
||||
class C:
|
||||
def foo(self): pass
|
||||
verify(C.foo.__name__ == "foo")
|
||||
verify(C().foo.__name__ == "foo")
|
||||
#cantset(C.foo, "__name__", "foo")
|
||||
#cantset(C().foo, "__name__", "foo")
|
||||
|
||||
def testmore():
|
||||
test_func_closure()
|
||||
test_empty_cell()
|
||||
test_func_doc()
|
||||
test_func_globals()
|
||||
test_func_name()
|
||||
test_func_code()
|
||||
test_func_defaults()
|
||||
test_func_dict()
|
||||
# Tests for instance method attributes
|
||||
test___self__()
|
||||
test___func__()
|
||||
test___self__()
|
||||
test_im_dict()
|
||||
test_im_doc()
|
||||
test_im_name()
|
||||
|
||||
testmore()
|
||||
import unittest
|
||||
|
||||
class FuncAttrsTest(unittest.TestCase):
|
||||
def setUp(self):
|
||||
class F:
|
||||
def a(self):
|
||||
pass
|
||||
def b():
|
||||
return 3
|
||||
self.fi = F()
|
||||
self.F = F
|
||||
self.b = b
|
||||
|
||||
def cannot_set_attr(self, obj, name, value, exceptions):
|
||||
try:
|
||||
setattr(obj, name, value)
|
||||
except exceptions:
|
||||
pass
|
||||
else:
|
||||
self.fail("shouldn't be able to set %s to %r" % (name, value))
|
||||
try:
|
||||
delattr(obj, name)
|
||||
except exceptions:
|
||||
pass
|
||||
else:
|
||||
self.fail("shouldn't be able to del %s" % name)
|
||||
|
||||
|
||||
class FunctionPropertiesTest(FuncAttrsTest):
|
||||
# Include the external setUp method that is common to all tests
|
||||
def test_module(self):
|
||||
self.assertEqual(self.b.__module__, __name__)
|
||||
|
||||
def test_dir_includes_correct_attrs(self):
|
||||
self.b.known_attr = 7
|
||||
self.assert_('known_attr' in dir(self.b),
|
||||
"set attributes not in dir listing of method")
|
||||
# Test on underlying function object of method
|
||||
self.F.a.known_attr = 7
|
||||
self.assert_('known_attr' in dir(self.fi.a), "set attribute on function "
|
||||
"implementations, should show up in next dir")
|
||||
|
||||
def test_duplicate_function_equality(self):
|
||||
# Body of `duplicate' is the exact same as self.b
|
||||
def duplicate():
|
||||
'my docstring'
|
||||
return 3
|
||||
self.assertNotEqual(self.b, duplicate)
|
||||
|
||||
def test_copying___code__(self):
|
||||
def test(): pass
|
||||
self.assertEqual(test(), None)
|
||||
test.__code__ = self.b.__code__
|
||||
self.assertEqual(test(), 3) # self.b always returns 3, arbitrarily
|
||||
|
||||
def test___globals__(self):
|
||||
self.assertEqual(self.b.__globals__, globals())
|
||||
self.cannot_set_attr(self.b, '__globals__', 2, (AttributeError, TypeError))
|
||||
|
||||
def test___name__(self):
|
||||
self.assertEqual(self.b.__name__, 'b')
|
||||
self.b.__name__ = 'c'
|
||||
self.assertEqual(self.b.__name__, 'c')
|
||||
self.b.__name__ = 'd'
|
||||
self.assertEqual(self.b.__name__, 'd')
|
||||
# __name__ and __name__ must be a string
|
||||
self.cannot_set_attr(self.b, '__name__', 7, TypeError)
|
||||
# __name__ must be available when in restricted mode. Exec will raise
|
||||
# AttributeError if __name__ is not available on f.
|
||||
s = """def f(): pass\nf.__name__"""
|
||||
exec(s, {'__builtins__': {}})
|
||||
# Test on methods, too
|
||||
self.assertEqual(self.fi.a.__name__, 'a')
|
||||
self.cannot_set_attr(self.fi.a, "__name__", 'a', AttributeError)
|
||||
|
||||
def test___code__(self):
|
||||
num_one, num_two = 7, 8
|
||||
def a(): pass
|
||||
def b(): return 12
|
||||
def c(): return num_one
|
||||
def d(): return num_two
|
||||
def e(): return num_one, num_two
|
||||
for func in [a, b, c, d, e]:
|
||||
self.assertEqual(type(func.__code__), types.CodeType)
|
||||
self.assertEqual(c(), 7)
|
||||
self.assertEqual(d(), 8)
|
||||
d.__code__ = c.__code__
|
||||
self.assertEqual(c.__code__, d.__code__)
|
||||
self.assertEqual(c(), 7)
|
||||
# self.assertEqual(d(), 7)
|
||||
try: b.__code__ = c.__code__
|
||||
except ValueError: pass
|
||||
else: self.fail(
|
||||
"__code__ with different numbers of free vars should not be "
|
||||
"possible")
|
||||
try: e.__code__ = d.__code__
|
||||
except ValueError: pass
|
||||
else: self.fail(
|
||||
"__code__ with different numbers of free vars should not be "
|
||||
"possible")
|
||||
|
||||
def test_blank_func_defaults(self):
|
||||
self.assertEqual(self.b.__defaults__, None)
|
||||
del self.b.__defaults__
|
||||
self.assertEqual(self.b.__defaults__, None)
|
||||
|
||||
def test_func_default_args(self):
|
||||
def first_func(a, b):
|
||||
return a+b
|
||||
def second_func(a=1, b=2):
|
||||
return a+b
|
||||
self.assertEqual(first_func.__defaults__, None)
|
||||
self.assertEqual(second_func.__defaults__, (1, 2))
|
||||
first_func.__defaults__ = (1, 2)
|
||||
self.assertEqual(first_func.__defaults__, (1, 2))
|
||||
self.assertEqual(first_func(), 3)
|
||||
self.assertEqual(first_func(3), 5)
|
||||
self.assertEqual(first_func(3, 5), 8)
|
||||
del second_func.__defaults__
|
||||
self.assertEqual(second_func.__defaults__, None)
|
||||
try: second_func()
|
||||
except TypeError: pass
|
||||
else: self.fail(
|
||||
"func_defaults does not update; deleting it does not remove "
|
||||
"requirement")
|
||||
|
||||
class ImplicitReferencesTest(FuncAttrsTest):
|
||||
|
||||
def test___class__(self):
|
||||
self.assertEqual(self.fi.a.__self__.__class__, self.F)
|
||||
self.cannot_set_attr(self.fi.a, "__class__", self.F, TypeError)
|
||||
|
||||
def test___func__(self):
|
||||
self.assertEqual(self.fi.a.__func__, self.F.a)
|
||||
self.cannot_set_attr(self.fi.a, "__func__", self.F.a, AttributeError)
|
||||
|
||||
def test___self__(self):
|
||||
self.assertEqual(self.fi.a.__self__, self.fi)
|
||||
self.cannot_set_attr(self.fi.a, "__self__", self.fi, AttributeError)
|
||||
|
||||
def test___func___non_method(self):
|
||||
# Behavior should be the same when a method is added via an attr
|
||||
# assignment
|
||||
self.fi.id = types.MethodType(id, self.fi)
|
||||
self.assertEqual(self.fi.id(), id(self.fi))
|
||||
# Test usage
|
||||
try: self.fi.id.unknown_attr
|
||||
except AttributeError: pass
|
||||
else: self.fail("using unknown attributes should raise AttributeError")
|
||||
# Test assignment and deletion
|
||||
self.cannot_set_attr(self.fi.id, 'unknown_attr', 2, AttributeError)
|
||||
|
||||
class ArbitraryFunctionAttrTest(FuncAttrsTest):
|
||||
def test_set_attr(self):
|
||||
self.b.known_attr = 7
|
||||
self.assertEqual(self.b.known_attr, 7)
|
||||
try: self.fi.a.known_attr = 7
|
||||
except AttributeError: pass
|
||||
else: self.fail("setting attributes on methods should raise error")
|
||||
|
||||
def test_delete_unknown_attr(self):
|
||||
try: del self.b.unknown_attr
|
||||
except AttributeError: pass
|
||||
else: self.fail("deleting unknown attribute should raise TypeError")
|
||||
|
||||
def test_unset_attr(self):
|
||||
for func in [self.b, self.fi.a]:
|
||||
try: func.non_existant_attr
|
||||
except AttributeError: pass
|
||||
else: self.fail("using unknown attributes should raise "
|
||||
"AttributeError")
|
||||
|
||||
class FunctionDictsTest(FuncAttrsTest):
|
||||
def test_setting_dict_to_invalid(self):
|
||||
self.cannot_set_attr(self.b, '__dict__', None, TypeError)
|
||||
from UserDict import UserDict
|
||||
d = UserDict({'known_attr': 7})
|
||||
self.cannot_set_attr(self.fi.a.__func__, '__dict__', d, TypeError)
|
||||
|
||||
def test_setting_dict_to_valid(self):
|
||||
d = {'known_attr': 7}
|
||||
self.b.__dict__ = d
|
||||
# Test assignment
|
||||
self.assertEqual(d, self.b.__dict__)
|
||||
# ... and on all the different ways of referencing the method's func
|
||||
self.F.a.__dict__ = d
|
||||
self.assertEqual(d, self.fi.a.__func__.__dict__)
|
||||
self.assertEqual(d, self.fi.a.__dict__)
|
||||
# Test value
|
||||
self.assertEqual(self.b.known_attr, 7)
|
||||
self.assertEqual(self.b.__dict__['known_attr'], 7)
|
||||
# ... and again, on all the different method's names
|
||||
self.assertEqual(self.fi.a.__func__.known_attr, 7)
|
||||
self.assertEqual(self.fi.a.known_attr, 7)
|
||||
|
||||
def test_delete___dict__(self):
|
||||
try: del self.b.__dict__
|
||||
except TypeError: pass
|
||||
else: self.fail("deleting function dictionary should raise TypeError")
|
||||
|
||||
def test_unassigned_dict(self):
|
||||
self.assertEqual(self.b.__dict__, {})
|
||||
|
||||
def test_func_as_dict_key(self):
|
||||
value = "Some string"
|
||||
d = {}
|
||||
d[self.b] = value
|
||||
self.assertEqual(d[self.b], value)
|
||||
|
||||
class FunctionDocstringTest(FuncAttrsTest):
|
||||
def test_set_docstring_attr(self):
|
||||
self.assertEqual(self.b.__doc__, None)
|
||||
docstr = "A test method that does nothing"
|
||||
self.b.__doc__ = docstr
|
||||
self.F.a.__doc__ = docstr
|
||||
self.assertEqual(self.b.__doc__, docstr)
|
||||
self.assertEqual(self.fi.a.__doc__, docstr)
|
||||
self.cannot_set_attr(self.fi.a, "__doc__", docstr, AttributeError)
|
||||
|
||||
def test_delete_docstring(self):
|
||||
self.b.__doc__ = "The docstring"
|
||||
del self.b.__doc__
|
||||
self.assertEqual(self.b.__doc__, None)
|
||||
|
||||
def test_main():
|
||||
test_support.run_unittest(FunctionPropertiesTest, ImplicitReferencesTest,
|
||||
ArbitraryFunctionAttrTest, FunctionDictsTest,
|
||||
FunctionDocstringTest)
|
||||
|
||||
if __name__ == "__main__":
|
||||
test_main()
|
||||
|
|
|
|||
Loading…
Reference in New Issue