380 lines
8.5 KiB
Python
380 lines
8.5 KiB
Python
from test.test_support import verbose, TestFailed, verify
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import types
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class F:
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def a(self):
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pass
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def b():
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'my docstring'
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pass
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# setting attributes on functions
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try:
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b.publish
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except AttributeError: pass
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else: raise TestFailed, 'expected AttributeError'
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if b.__dict__ <> {}:
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raise TestFailed, 'expected unassigned func.__dict__ to be {}'
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b.publish = 1
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if b.publish <> 1:
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raise TestFailed, 'function attribute not set to expected value'
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docstring = 'its docstring'
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b.__doc__ = docstring
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if b.__doc__ <> docstring:
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raise TestFailed, 'problem with setting __doc__ attribute'
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if 'publish' not in dir(b):
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raise TestFailed, 'attribute not in dir()'
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try:
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del b.__dict__
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except TypeError: pass
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else: raise TestFailed, 'del func.__dict__ expected TypeError'
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b.publish = 1
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try:
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b.__dict__ = None
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except TypeError: pass
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else: raise TestFailed, 'func.__dict__ = None expected TypeError'
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d = {'hello': 'world'}
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b.__dict__ = d
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if b.func_dict is not d:
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raise TestFailed, 'func.__dict__ assignment to dictionary failed'
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if b.hello <> 'world':
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raise TestFailed, 'attribute after func.__dict__ assignment failed'
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f1 = F()
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f2 = F()
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try:
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F.a.publish
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except AttributeError: pass
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else: raise TestFailed, 'expected AttributeError'
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try:
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f1.a.publish
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except AttributeError: pass
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else: raise TestFailed, 'expected AttributeError'
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# In Python 2.1 beta 1, we disallowed setting attributes on unbound methods
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# (it was already disallowed on bound methods). See the PEP for details.
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try:
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F.a.publish = 1
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except (AttributeError, TypeError): pass
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else: raise TestFailed, 'expected AttributeError or TypeError'
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# But setting it explicitly on the underlying function object is okay.
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F.a.im_func.publish = 1
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if F.a.publish <> 1:
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raise TestFailed, 'unbound method attribute not set to expected value'
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if f1.a.publish <> 1:
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raise TestFailed, 'bound method attribute access did not work'
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if f2.a.publish <> 1:
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raise TestFailed, 'bound method attribute access did not work'
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if 'publish' not in dir(F.a):
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raise TestFailed, 'attribute not in dir()'
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try:
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f1.a.publish = 0
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except (AttributeError, TypeError): pass
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else: raise TestFailed, 'expected AttributeError or TypeError'
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# See the comment above about the change in semantics for Python 2.1b1
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try:
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F.a.myclass = F
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except (AttributeError, TypeError): pass
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else: raise TestFailed, 'expected AttributeError or TypeError'
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F.a.im_func.myclass = F
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f1.a.myclass
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f2.a.myclass
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f1.a.myclass
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F.a.myclass
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if f1.a.myclass is not f2.a.myclass or \
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f1.a.myclass is not F.a.myclass:
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raise TestFailed, 'attributes were not the same'
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# try setting __dict__
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try:
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F.a.__dict__ = (1, 2, 3)
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except (AttributeError, TypeError): pass
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else: raise TestFailed, 'expected TypeError or AttributeError'
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F.a.im_func.__dict__ = {'one': 11, 'two': 22, 'three': 33}
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if f1.a.two <> 22:
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raise TestFailed, 'setting __dict__'
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from UserDict import UserDict
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d = UserDict({'four': 44, 'five': 55})
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try:
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F.a.__dict__ = d
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except (AttributeError, TypeError): pass
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else: raise TestFailed
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if f2.a.one <> f1.a.one <> F.a.one <> 11:
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raise TestFailed
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# im_func may not be a Python method!
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import new
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F.id = new.instancemethod(id, None, F)
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eff = F()
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if eff.id() <> id(eff):
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raise TestFailed
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try:
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F.id.foo
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except AttributeError: pass
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else: raise TestFailed
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try:
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F.id.foo = 12
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except (AttributeError, TypeError): pass
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else: raise TestFailed
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try:
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F.id.foo
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except AttributeError: pass
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else: raise TestFailed
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try:
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eff.id.foo
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except AttributeError: pass
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else: raise TestFailed
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try:
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eff.id.foo = 12
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except (AttributeError, TypeError): pass
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else: raise TestFailed
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try:
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eff.id.foo
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except AttributeError: pass
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else: raise TestFailed
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# Regression test for a crash in pre-2.1a1
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def another():
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pass
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try:
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del another.__dict__
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except TypeError: pass
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else: raise TestFailed
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try:
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del another.func_dict
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except TypeError: pass
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else: raise TestFailed
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try:
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another.func_dict = None
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except TypeError: pass
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else: raise TestFailed
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try:
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del another.bar
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except AttributeError: pass
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else: raise TestFailed
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# This isn't specifically related to function attributes, but it does test a
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# core dump regression in funcobject.c
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del another.func_defaults
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def foo():
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pass
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def bar():
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pass
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def temp():
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print 1
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if foo==bar:
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raise TestFailed
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d={}
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d[foo] = 1
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foo.func_code = temp.func_code
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d[foo]
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# Test all predefined function attributes systematically
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def cantset(obj, name, value):
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verify(hasattr(obj, name)) # Otherwise it's probably a typo
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try:
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setattr(obj, name, value)
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except (AttributeError, TypeError):
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pass
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else:
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raise TestFailed, "shouldn't be able to set %s to %r" % (name, value)
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try:
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delattr(obj, name)
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except (AttributeError, TypeError):
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pass
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else:
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raise TestFailed, "shouldn't be able to del %s" % name
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def test_func_closure():
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a = 12
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def f(): print a
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c = f.func_closure
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verify(isinstance(c, tuple))
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verify(len(c) == 1)
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verify(c[0].__class__.__name__ == "cell") # don't have a type object handy
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cantset(f, "func_closure", c)
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def test_func_doc():
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def f(): pass
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verify(f.__doc__ is None)
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verify(f.func_doc is None)
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f.__doc__ = "hello"
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verify(f.__doc__ == "hello")
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verify(f.func_doc == "hello")
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del f.__doc__
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verify(f.__doc__ is None)
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verify(f.func_doc is None)
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f.func_doc = "world"
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verify(f.__doc__ == "world")
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verify(f.func_doc == "world")
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del f.func_doc
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verify(f.func_doc is None)
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verify(f.__doc__ is None)
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def test_func_globals():
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def f(): pass
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verify(f.func_globals is globals())
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cantset(f, "func_globals", globals())
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def test_func_name():
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def f(): pass
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verify(f.__name__ == "f")
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verify(f.func_name == "f")
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cantset(f, "func_name", "f")
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cantset(f, "__name__", "f")
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def test_func_code():
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def f(): pass
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def g(): print 12
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verify(type(f.func_code) is types.CodeType)
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f.func_code = g.func_code
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cantset(f, "func_code", None)
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def test_func_defaults():
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def f(a, b): return (a, b)
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verify(f.func_defaults is None)
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f.func_defaults = (1, 2)
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verify(f.func_defaults == (1, 2))
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verify(f(10) == (10, 2))
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def g(a=1, b=2): return (a, b)
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verify(g.func_defaults == (1, 2))
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del g.func_defaults
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verify(g.func_defaults is None)
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try:
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g()
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except TypeError:
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pass
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else:
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raise TestFailed, "shouldn't be allowed to call g() w/o defaults"
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def test_func_dict():
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def f(): pass
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a = f.__dict__
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b = f.func_dict
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verify(a == {})
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verify(a is b)
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f.hello = 'world'
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verify(a == {'hello': 'world'})
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verify(f.func_dict is a is f.__dict__)
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f.func_dict = {}
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verify(not hasattr(f, "hello"))
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f.__dict__ = {'world': 'hello'}
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verify(f.world == "hello")
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verify(f.__dict__ is f.func_dict == {'world': 'hello'})
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cantset(f, "func_dict", None)
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cantset(f, "__dict__", None)
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def test_im_class():
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class C:
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def foo(self): pass
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verify(C.foo.im_class is C)
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verify(C().foo.im_class is C)
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cantset(C.foo, "im_class", C)
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cantset(C().foo, "im_class", C)
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def test_im_func():
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def foo(self): pass
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class C:
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pass
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C.foo = foo
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verify(C.foo.im_func is foo)
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verify(C().foo.im_func is foo)
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cantset(C.foo, "im_func", foo)
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cantset(C().foo, "im_func", foo)
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def test_im_self():
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class C:
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def foo(self): pass
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verify(C.foo.im_self is None)
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c = C()
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verify(c.foo.im_self is c)
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cantset(C.foo, "im_self", None)
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cantset(c.foo, "im_self", c)
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def test_im_dict():
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class C:
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def foo(self): pass
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foo.bar = 42
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verify(C.foo.__dict__ == {'bar': 42})
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verify(C().foo.__dict__ == {'bar': 42})
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cantset(C.foo, "__dict__", C.foo.__dict__)
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cantset(C().foo, "__dict__", C.foo.__dict__)
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def test_im_doc():
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class C:
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def foo(self): "hello"
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verify(C.foo.__doc__ == "hello")
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verify(C().foo.__doc__ == "hello")
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cantset(C.foo, "__doc__", "hello")
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cantset(C().foo, "__doc__", "hello")
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def test_im_name():
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class C:
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def foo(self): pass
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verify(C.foo.__name__ == "foo")
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verify(C().foo.__name__ == "foo")
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cantset(C.foo, "__name__", "foo")
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cantset(C().foo, "__name__", "foo")
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def testmore():
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test_func_closure()
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test_func_doc()
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test_func_globals()
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test_func_name()
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test_func_code()
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test_func_defaults()
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test_func_dict()
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# Tests for instance method attributes
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test_im_class()
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test_im_func()
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test_im_self()
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test_im_dict()
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test_im_doc()
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test_im_name()
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testmore()
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