Merge r60522 from trunk.
This commit is contained in:
Georg Brandl
parent
479a7e7af6
commit
60d1456e69
@ -1,369 +1,233 @@
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from test.test_support import verbose, TestFailed, verify
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from test import test_support
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import types
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import types
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import unittest
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class FuncAttrsTest(unittest.TestCase):
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def setUp(self):
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class F:
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class F:
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def a(self):
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def a(self):
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pass
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pass
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def b():
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def b():
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'my docstring'
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return 3
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pass
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self.fi = F()
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self.F = F
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self.b = b
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# __module__ is a special attribute
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def cannot_set_attr(self, obj, name, value, exceptions):
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verify(b.__module__ == __name__)
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verify(verify.__module__ == "test.test_support")
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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.__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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# In Python 3.0 unbound methods are gone.
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F.a.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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# try setting __dict__
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F.a.__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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# __func__ may not be a Python method!
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import types
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F.id = id
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eff = F()
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eff.id = types.MethodType(id, eff)
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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.__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.__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.__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.__code__ = temp.__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, exception=(AttributeError, TypeError)):
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verify(hasattr(obj, name)) # Otherwise it's probably a typo
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try:
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try:
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setattr(obj, name, value)
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setattr(obj, name, value)
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except exception:
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except exceptions:
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pass
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pass
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else:
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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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self.fail("shouldn't be able to set %s to %r" % (name, value))
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try:
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try:
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delattr(obj, name)
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delattr(obj, name)
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except (AttributeError, TypeError):
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except exceptions:
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pass
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pass
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else:
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else:
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raise TestFailed("shouldn't be able to del %s" % name)
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self.fail("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.__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, "__closure__", c)
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def test_empty_cell():
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class FunctionPropertiesTest(FuncAttrsTest):
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def f(): print(a)
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# Include the external setUp method that is common to all tests
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try:
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def test_module(self):
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f.__closure__[0].cell_contents
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self.assertEqual(self.b.__module__, __name__)
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except ValueError:
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pass
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else:
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raise TestFailed("shouldn't be able to read an empty cell")
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a = 12
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def test_dir_includes_correct_attrs(self):
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self.b.known_attr = 7
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self.assert_('known_attr' in dir(self.b),
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"set attributes not in dir listing of method")
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# Test on underlying function object of method
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self.F.a.known_attr = 7
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self.assert_('known_attr' in dir(self.fi.a), "set attribute on function "
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"implementations, should show up in next dir")
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def test_func_doc():
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def test_duplicate_function_equality(self):
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def f(): pass
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# Body of `duplicate' is the exact same as self.b
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verify(f.__doc__ is None)
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def duplicate():
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f.__doc__ = "hello"
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'my docstring'
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verify(f.__doc__ == "hello")
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return 3
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del f.__doc__
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self.assertNotEqual(self.b, duplicate)
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verify(f.__doc__ is None)
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def test_func_globals():
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def test_copying___code__(self):
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def f(): pass
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def test(): pass
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verify(f.__globals__ is globals())
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self.assertEqual(test(), None)
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cantset(f, "__globals__", globals())
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test.__code__ = self.b.__code__
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self.assertEqual(test(), 3) # self.b always returns 3, arbitrarily
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def test_func_name():
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def test___globals__(self):
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def f(): pass
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self.assertEqual(self.b.__globals__, globals())
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verify(f.__name__ == "f")
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self.cannot_set_attr(self.b, '__globals__', 2, (AttributeError, TypeError))
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f.__name__ = "g"
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verify(f.__name__ == "g")
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def test___name__(self):
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cantset(f, "__globals__", 1)
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self.assertEqual(self.b.__name__, 'b')
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cantset(f, "__name__", 1)
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self.b.__name__ = 'c'
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# test that you can access func.__name__ in restricted mode
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self.assertEqual(self.b.__name__, 'c')
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self.b.__name__ = 'd'
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self.assertEqual(self.b.__name__, 'd')
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# __name__ and __name__ must be a string
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self.cannot_set_attr(self.b, '__name__', 7, TypeError)
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# __name__ must be available when in restricted mode. Exec will raise
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# AttributeError if __name__ is not available on f.
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s = """def f(): pass\nf.__name__"""
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s = """def f(): pass\nf.__name__"""
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exec(s, {'__builtins__': {}})
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exec(s, {'__builtins__': {}})
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# Test on methods, too
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self.assertEqual(self.fi.a.__name__, 'a')
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self.cannot_set_attr(self.fi.a, "__name__", 'a', AttributeError)
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def test___code__(self):
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num_one, num_two = 7, 8
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def a(): pass
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def b(): return 12
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def c(): return num_one
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def d(): return num_two
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def e(): return num_one, num_two
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for func in [a, b, c, d, e]:
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self.assertEqual(type(func.__code__), types.CodeType)
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self.assertEqual(c(), 7)
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self.assertEqual(d(), 8)
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d.__code__ = c.__code__
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self.assertEqual(c.__code__, d.__code__)
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self.assertEqual(c(), 7)
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# self.assertEqual(d(), 7)
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try: b.__code__ = c.__code__
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except ValueError: pass
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else: self.fail(
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"__code__ with different numbers of free vars should not be "
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"possible")
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try: e.__code__ = d.__code__
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except ValueError: pass
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else: self.fail(
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"__code__ with different numbers of free vars should not be "
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"possible")
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def test_func_code():
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def test_blank_func_defaults(self):
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a = b = 24
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self.assertEqual(self.b.__defaults__, None)
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def f(): pass
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del self.b.__defaults__
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def g(): print(12)
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self.assertEqual(self.b.__defaults__, None)
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def f1(): print(a)
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def g1(): print(b)
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def f2(): print(a, b)
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verify(type(f.__code__) is types.CodeType)
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f.__code__ = g.__code__
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cantset(f, "__code__", None)
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# can't change the number of free vars
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cantset(f, "__code__", f1.__code__, exception=ValueError)
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cantset(f1, "__code__", f.__code__, exception=ValueError)
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cantset(f1, "__code__", f2.__code__, exception=ValueError)
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f1.__code__ = g1.__code__
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def test_func_defaults():
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def test_func_default_args(self):
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def f(a, b): return (a, b)
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def first_func(a, b):
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verify(f.__defaults__ is None)
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return a+b
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f.__defaults__ = (1, 2)
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def second_func(a=1, b=2):
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verify(f.__defaults__ == (1, 2))
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return a+b
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verify(f(10) == (10, 2))
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self.assertEqual(first_func.__defaults__, None)
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def g(a=1, b=2): return (a, b)
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self.assertEqual(second_func.__defaults__, (1, 2))
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verify(g.__defaults__ == (1, 2))
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first_func.__defaults__ = (1, 2)
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del g.__defaults__
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self.assertEqual(first_func.__defaults__, (1, 2))
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verify(g.__defaults__ is None)
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self.assertEqual(first_func(), 3)
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try:
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self.assertEqual(first_func(3), 5)
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g()
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self.assertEqual(first_func(3, 5), 8)
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except TypeError:
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del second_func.__defaults__
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pass
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self.assertEqual(second_func.__defaults__, None)
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else:
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try: second_func()
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raise TestFailed("shouldn't be allowed to call g() w/o defaults")
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except TypeError: pass
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else: self.fail(
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"func_defaults does not update; deleting it does not remove "
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"requirement")
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def test_func_dict():
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class ImplicitReferencesTest(FuncAttrsTest):
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def f(): pass
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a = f.__dict__
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verify(a == {})
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f.hello = 'world'
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verify(a == {'hello': 'world'})
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verify(a is f.__dict__)
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f.__dict__ = {'world': 'hello'}
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verify(f.world == "hello")
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verify(f.__dict__ == {'world': 'hello'})
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cantset(f, "__dict__", None)
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def test___self__():
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def test___class__(self):
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class C:
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self.assertEqual(self.fi.a.__self__.__class__, self.F)
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def foo(self): pass
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self.cannot_set_attr(self.fi.a, "__class__", self.F, TypeError)
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#verify(C.foo.__self__.__class__ is C)
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verify(C().foo.__self__.__class__ is C)
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#cantset(C.foo, "__self__.__class__", C)
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cantset(C().foo, "__self__.__class__", C)
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def test___func__():
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def test___func__(self):
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def foo(self): pass
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self.assertEqual(self.fi.a.__func__, self.F.a)
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class C:
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self.cannot_set_attr(self.fi.a, "__func__", self.F.a, AttributeError)
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pass
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C.foo = foo
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#verify(C.foo.__func__ is foo)
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verify(C().foo.__func__ is foo)
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#cantset(C.foo, "__func__", foo)
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cantset(C().foo, "__func__", foo)
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def test___self__():
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def test___self__(self):
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class C:
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self.assertEqual(self.fi.a.__self__, self.fi)
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def foo(self): pass
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self.cannot_set_attr(self.fi.a, "__self__", self.fi, AttributeError)
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#verify(C.foo.__self__ is None)
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c = C()
|
|
||||||
#verify(c.foo.__self__ is c)
|
|
||||||
#cantset(C.foo, "__self__", None)
|
|
||||||
#cantset(c.foo, "__self__", c)
|
|
||||||
|
|
||||||
def test_im_dict():
|
def test___func___non_method(self):
|
||||||
class C:
|
# Behavior should be the same when a method is added via an attr
|
||||||
def foo(self): pass
|
# assignment
|
||||||
foo.bar = 42
|
self.fi.id = types.MethodType(id, self.fi)
|
||||||
verify(C.foo.__dict__ == {'bar': 42})
|
self.assertEqual(self.fi.id(), id(self.fi))
|
||||||
verify(C().foo.__dict__ == {'bar': 42})
|
# Test usage
|
||||||
#cantset(C.foo, "__dict__", C.foo.__dict__)
|
try: self.fi.id.unknown_attr
|
||||||
#cantset(C().foo, "__dict__", C.foo.__dict__)
|
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)
|
||||||
|
|
||||||
def test_im_doc():
|
class ArbitraryFunctionAttrTest(FuncAttrsTest):
|
||||||
class C:
|
def test_set_attr(self):
|
||||||
def foo(self): "hello"
|
self.b.known_attr = 7
|
||||||
verify(C.foo.__doc__ == "hello")
|
self.assertEqual(self.b.known_attr, 7)
|
||||||
verify(C().foo.__doc__ == "hello")
|
try: self.fi.a.known_attr = 7
|
||||||
#cantset(C.foo, "__doc__", "hello")
|
except AttributeError: pass
|
||||||
#cantset(C().foo, "__doc__", "hello")
|
else: self.fail("setting attributes on methods should raise error")
|
||||||
|
|
||||||
def test_im_name():
|
def test_delete_unknown_attr(self):
|
||||||
class C:
|
try: del self.b.unknown_attr
|
||||||
def foo(self): pass
|
except AttributeError: pass
|
||||||
verify(C.foo.__name__ == "foo")
|
else: self.fail("deleting unknown attribute should raise TypeError")
|
||||||
verify(C().foo.__name__ == "foo")
|
|
||||||
#cantset(C.foo, "__name__", "foo")
|
|
||||||
#cantset(C().foo, "__name__", "foo")
|
|
||||||
|
|
||||||
def testmore():
|
def test_unset_attr(self):
|
||||||
test_func_closure()
|
for func in [self.b, self.fi.a]:
|
||||||
test_empty_cell()
|
try: func.non_existant_attr
|
||||||
test_func_doc()
|
except AttributeError: pass
|
||||||
test_func_globals()
|
else: self.fail("using unknown attributes should raise "
|
||||||
test_func_name()
|
"AttributeError")
|
||||||
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()
|
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…
x
Reference in New Issue
Block a user