Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
This commit is contained in:
Georg Brandl
parent
4854552f02
commit
c8088df363
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@ -1,414 +1,281 @@
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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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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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# __module__ is a special attribute
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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.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 types
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F.id = types.MethodType(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, 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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setattr(obj, name, value)
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except exception:
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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_empty_cell():
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def f(): print a
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try:
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f.func_closure[0].cell_contents
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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_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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f.__name__ = "g"
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verify(f.__name__ == "g")
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verify(f.func_name == "g")
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f.func_name = "h"
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verify(f.__name__ == "h")
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verify(f.func_name == "h")
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cantset(f, "func_globals", 1)
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cantset(f, "__name__", 1)
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# test that you can access func.__name__ in restricted mode
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s = """def f(): pass\nf.__name__"""
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exec s in {'__builtins__':{}}
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def test_func_code():
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a = b = 24
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def f(): pass
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def g(): print 12
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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.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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# can't change the number of free vars
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cantset(f, "func_code", f1.func_code, exception=ValueError)
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cantset(f1, "func_code", f.func_code, exception=ValueError)
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cantset(f1, "func_code", f2.func_code, exception=ValueError)
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f1.func_code = g1.func_code
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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_empty_cell()
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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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import unittest
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def cannot_set_attr(obj, name, value, exceptions):
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# This method is not called as a test (name doesn't start with 'test'),
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# but may be used by other tests.
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try: setattr(obj, name, value)
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except exceptions: pass
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else: self.fail("shouldn't be able to set %s to %r" % (name, value))
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try: delattr(obj, name)
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except exceptions: pass
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else: self.fail("shouldn't be able to del %s" % name)
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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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def a(self):
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pass
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def b():
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return 3
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self.f = F
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self.fi = F()
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self.b = b
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class FunctionPropertiesTest(FuncAttrsTest):
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# Include the external setUp method that is common to all tests
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def test_module(self):
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self.assertEqual(self.b.__module__, __name__)
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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.im_func.known_attr = 7
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self.assert_('known_attr' in dir(self.f.a),
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"set attribute on unbound method implementation in class not in "
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"dir")
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self.assert_('known_attr' in dir(self.fi.a),
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"set attribute on unbound method implementations, should show up"
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" in next dir")
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def test_duplicate_function_equality(self):
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# Body of `duplicate' is the exact same as self.b
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def duplicate():
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'my docstring'
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return 3
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self.assertNotEqual(self.b, duplicate)
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def test_copying_func_code(self):
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def test(): pass
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self.assertEqual(test(), None)
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test.func_code = self.b.func_code
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self.assertEqual(test(), 3) # self.b always returns 3, arbitrarily
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def test_func_globals(self):
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self.assertEqual(self.b.func_globals, globals())
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cannot_set_attr(self.b, 'func_globals', 2, TypeError)
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def test_func_name(self):
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self.assertEqual(self.b.__name__, 'b')
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self.assertEqual(self.b.func_name, 'b')
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self.b.__name__ = 'c'
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self.assertEqual(self.b.__name__, 'c')
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self.assertEqual(self.b.func_name, 'c')
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self.b.func_name = 'd'
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self.assertEqual(self.b.__name__, 'd')
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self.assertEqual(self.b.func_name, 'd')
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# __name__ and func_name must be a string
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cannot_set_attr(self.b, '__name__', 7, TypeError)
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cannot_set_attr(self.b, 'func_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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exec s in {'__builtins__': {}}
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# Test on methods, too
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self.assertEqual(self.f.a.__name__, 'a')
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self.assertEqual(self.fi.a.__name__, 'a')
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cannot_set_attr(self.f.a, "__name__", 'a', AttributeError)
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cannot_set_attr(self.fi.a, "__name__", 'a', AttributeError)
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def test_func_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.func_code), types.CodeType)
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self.assertEqual(c(), 7)
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self.assertEqual(d(), 8)
|
||||
d.func_code = c.func_code
|
||||
self.assertEqual(c.func_code, d.func_code)
|
||||
self.assertEqual(c(), 7)
|
||||
# self.assertEqual(d(), 7)
|
||||
try: b.func_code = c.func_code
|
||||
except ValueError: pass
|
||||
else: self.fail(
|
||||
"func_code with different numbers of free vars should not be "
|
||||
"possible")
|
||||
try: e.func_code = d.func_code
|
||||
except ValueError: pass
|
||||
else: self.fail(
|
||||
"func_code with different numbers of free vars should not be "
|
||||
"possible")
|
||||
|
||||
def test_blank_func_defaults(self):
|
||||
self.assertEqual(self.b.func_defaults, None)
|
||||
del self.b.func_defaults
|
||||
self.assertEqual(self.b.func_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.func_defaults, None)
|
||||
self.assertEqual(second_func.func_defaults, (1, 2))
|
||||
first_func.func_defaults = (1, 2)
|
||||
self.assertEqual(first_func.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.func_defaults
|
||||
self.assertEqual(second_func.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_im_class(self):
|
||||
self.assertEqual(self.f.a.im_class, self.f)
|
||||
self.assertEqual(self.fi.a.im_class, self.f)
|
||||
cannot_set_attr(self.f.a, "im_class", self.f, TypeError)
|
||||
cannot_set_attr(self.fi.a, "im_class", self.f, TypeError)
|
||||
|
||||
def test_im_func(self):
|
||||
self.f.b = self.b
|
||||
self.assertEqual(self.f.b.im_func, self.b)
|
||||
self.assertEqual(self.fi.b.im_func, self.b)
|
||||
cannot_set_attr(self.f.b, "im_func", self.b, TypeError)
|
||||
cannot_set_attr(self.fi.b, "im_func", self.b, TypeError)
|
||||
|
||||
def test_im_self(self):
|
||||
self.assertEqual(self.f.a.im_self, None)
|
||||
self.assertEqual(self.fi.a.im_self, self.fi)
|
||||
cannot_set_attr(self.f.a, "im_self", None, TypeError)
|
||||
cannot_set_attr(self.fi.a, "im_self", self.fi, TypeError)
|
||||
|
||||
def test_im_func_non_method(self):
|
||||
# Behavior should be the same when a method is added via an attr
|
||||
# assignment
|
||||
self.f.id = types.MethodType(id, None, self.f)
|
||||
self.assertEqual(self.fi.id(), id(self.fi))
|
||||
self.assertNotEqual(self.fi.id(), id(self.f))
|
||||
# Test usage
|
||||
try: self.f.id.unknown_attr
|
||||
except AttributeError: pass
|
||||
else: self.fail("using unknown attributes should raise AttributeError")
|
||||
# Test assignment and deletion
|
||||
cannot_set_attr(self.f.id, 'unknown_attr', 2, AttributeError)
|
||||
cannot_set_attr(self.fi.id, 'unknown_attr', 2, AttributeError)
|
||||
|
||||
def test_implicit_method_properties(self):
|
||||
self.f.a.im_func.known_attr = 7
|
||||
self.assertEqual(self.f.a.known_attr, 7)
|
||||
self.assertEqual(self.fi.a.known_attr, 7)
|
||||
|
||||
class ArbitraryFunctionAttrTest(FuncAttrsTest):
|
||||
def test_set_attr(self):
|
||||
self.b.known_attr = 7
|
||||
self.assertEqual(self.b.known_attr, 7)
|
||||
for func in [self.f.a, self.fi.a]:
|
||||
try: func.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_setting_attrs_duplicates(self):
|
||||
try: self.f.a.klass = self.f
|
||||
except AttributeError: pass
|
||||
else: self.fail("setting arbitrary attribute in unbound function "
|
||||
" should raise AttributeError")
|
||||
self.f.a.im_func.klass = self.f
|
||||
for method in [self.f.a, self.fi.a, self.fi.a.im_func]:
|
||||
self.assertEqual(method.klass, self.f)
|
||||
|
||||
def test_unset_attr(self):
|
||||
for func in [self.b, self.f.a, 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):
|
||||
cannot_set_attr(self.b, '__dict__', None, TypeError)
|
||||
cannot_set_attr(self.b, 'func_dict', None, TypeError)
|
||||
from UserDict import UserDict
|
||||
d = UserDict({'known_attr': 7})
|
||||
cannot_set_attr(self.f.a.im_func, '__dict__', d, TypeError)
|
||||
cannot_set_attr(self.fi.a.im_func, '__dict__', d, TypeError)
|
||||
|
||||
def test_setting_dict_to_valid(self):
|
||||
d = {'known_attr': 7}
|
||||
self.b.__dict__ = d
|
||||
# Setting dict is only possible on the underlying function objects
|
||||
self.f.a.im_func.__dict__ = d
|
||||
# Test assignment
|
||||
self.assertEqual(d, self.b.__dict__)
|
||||
self.assertEqual(d, self.b.func_dict)
|
||||
# ... and on all the different ways of referencing the method's func
|
||||
self.assertEqual(d, self.f.a.im_func.__dict__)
|
||||
self.assertEqual(d, self.f.a.__dict__)
|
||||
self.assertEqual(d, self.fi.a.im_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)
|
||||
self.assertEqual(self.b.func_dict['known_attr'], 7)
|
||||
# ... and again, on all the different method's names
|
||||
self.assertEqual(self.f.a.im_func.known_attr, 7)
|
||||
self.assertEqual(self.f.a.known_attr, 7)
|
||||
self.assertEqual(self.fi.a.im_func.known_attr, 7)
|
||||
self.assertEqual(self.fi.a.known_attr, 7)
|
||||
|
||||
def test_delete_func_dict(self):
|
||||
try: del self.b.__dict__
|
||||
except TypeError: pass
|
||||
else: self.fail("deleting function dictionary should raise TypeError")
|
||||
try: del self.b.func_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)
|
||||
self.assertEqual(self.b.func_doc, None)
|
||||
docstr = "A test method that does nothing"
|
||||
self.b.__doc__ = self.f.a.im_func.__doc__ = docstr
|
||||
self.assertEqual(self.b.__doc__, docstr)
|
||||
self.assertEqual(self.b.func_doc, docstr)
|
||||
self.assertEqual(self.f.a.__doc__, docstr)
|
||||
self.assertEqual(self.fi.a.__doc__, docstr)
|
||||
cannot_set_attr(self.f.a, "__doc__", docstr, AttributeError)
|
||||
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)
|
||||
self.assertEqual(self.b.func_doc, None)
|
||||
self.b.func_doc = "The docstring"
|
||||
del self.b.func_doc
|
||||
self.assertEqual(self.b.__doc__, None)
|
||||
self.assertEqual(self.b.func_doc, None)
|
||||
|
||||
def test_main():
|
||||
test_support.run_unittest(FunctionPropertiesTest, ImplicitReferencesTest,
|
||||
ArbitraryFunctionAttrTest, FunctionDictsTest,
|
||||
FunctionDocstringTest)
|
||||
|
||||
if __name__ == "__main__":
|
||||
test_main()
|
||||
|
|
|
|||
Loading…
Reference in New Issue