[Jython-checkins] jython: from:
frank.wierzbicki
jython-checkins at python.org
Tue Jun 26 22:32:58 CEST 2012
http://hg.python.org/jython/rev/b045281fdd52
changeset: 6745:b045281fdd52
user: Frank Wierzbicki <fwierzbicki at gmail.com>
date: Mon Jun 25 09:55:47 2012 -0700
summary:
from:
http://hg.python.org/cpython/Lib/test/test_funcattrs.py@22db03646d9b
files:
Lib/test/test_funcattrs.py | 353 +++++++++++++++++++++++++
1 files changed, 353 insertions(+), 0 deletions(-)
diff --git a/Lib/test/test_funcattrs.py b/Lib/test/test_funcattrs.py
new file mode 100644
--- /dev/null
+++ b/Lib/test/test_funcattrs.py
@@ -0,0 +1,353 @@
+from test import test_support
+import types
+import unittest
+
+class FuncAttrsTest(unittest.TestCase):
+ def setUp(self):
+ class F:
+ def a(self):
+ pass
+ def b():
+ return 3
+ self.f = F
+ self.fi = F()
+ self.b = b
+
+ def cannot_set_attr(self, obj, name, value, exceptions):
+ # Helper method for other tests.
+ try:
+ setattr(obj, name, value)
+ except exceptions:
+ pass
+ else:
+ self.fail("shouldn't be able to set %s to %r" % (name, value))
+ try:
+ delattr(obj, name)
+ except exceptions:
+ pass
+ else:
+ self.fail("shouldn't be able to del %s" % name)
+
+
+class FunctionPropertiesTest(FuncAttrsTest):
+ # Include the external setUp method that is common to all tests
+ def test_module(self):
+ self.assertEqual(self.b.__module__, __name__)
+
+ def test_dir_includes_correct_attrs(self):
+ self.b.known_attr = 7
+ self.assertIn('known_attr', dir(self.b),
+ "set attributes not in dir listing of method")
+ # Test on underlying function object of method
+ self.f.a.im_func.known_attr = 7
+ self.assertIn('known_attr', dir(self.f.a),
+ "set attribute on unbound method implementation in "
+ "class not in dir")
+ self.assertIn('known_attr', dir(self.fi.a),
+ "set attribute on unbound method implementations, "
+ "should show up in next dir")
+
+ def test_duplicate_function_equality(self):
+ # Body of `duplicate' is the exact same as self.b
+ def duplicate():
+ 'my docstring'
+ return 3
+ self.assertNotEqual(self.b, duplicate)
+
+ def test_copying_func_code(self):
+ def test(): pass
+ self.assertEqual(test(), None)
+ test.func_code = self.b.func_code
+ self.assertEqual(test(), 3) # self.b always returns 3, arbitrarily
+
+ def test_func_globals(self):
+ self.assertIs(self.b.func_globals, globals())
+ self.cannot_set_attr(self.b, 'func_globals', 2, TypeError)
+
+ def test_func_closure(self):
+ a = 12
+ def f(): print a
+ c = f.func_closure
+ self.assertIsInstance(c, tuple)
+ self.assertEqual(len(c), 1)
+ # don't have a type object handy
+ self.assertEqual(c[0].__class__.__name__, "cell")
+ self.cannot_set_attr(f, "func_closure", c, TypeError)
+
+ def test_empty_cell(self):
+ def f(): print a
+ try:
+ f.func_closure[0].cell_contents
+ except ValueError:
+ pass
+ else:
+ self.fail("shouldn't be able to read an empty cell")
+ a = 12
+
+ def test_func_name(self):
+ self.assertEqual(self.b.__name__, 'b')
+ self.assertEqual(self.b.func_name, 'b')
+ self.b.__name__ = 'c'
+ self.assertEqual(self.b.__name__, 'c')
+ self.assertEqual(self.b.func_name, 'c')
+ self.b.func_name = 'd'
+ self.assertEqual(self.b.__name__, 'd')
+ self.assertEqual(self.b.func_name, 'd')
+ # __name__ and func_name must be a string
+ self.cannot_set_attr(self.b, '__name__', 7, TypeError)
+ self.cannot_set_attr(self.b, 'func_name', 7, TypeError)
+ # __name__ must be available when in restricted mode. Exec will raise
+ # AttributeError if __name__ is not available on f.
+ s = """def f(): pass\nf.__name__"""
+ exec s in {'__builtins__': {}}
+ # Test on methods, too
+ self.assertEqual(self.f.a.__name__, 'a')
+ self.assertEqual(self.fi.a.__name__, 'a')
+ self.cannot_set_attr(self.f.a, "__name__", 'a', AttributeError)
+ self.cannot_set_attr(self.fi.a, "__name__", 'a', AttributeError)
+
+ def test_func_code(self):
+ num_one, num_two = 7, 8
+ def a(): pass
+ def b(): return 12
+ def c(): return num_one
+ def d(): return num_two
+ def e(): return num_one, num_two
+ for func in [a, b, c, d, e]:
+ self.assertEqual(type(func.func_code), types.CodeType)
+ self.assertEqual(c(), 7)
+ 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 InstancemethodAttrTest(FuncAttrsTest):
+ def test_im_class(self):
+ self.assertEqual(self.f.a.im_class, self.f)
+ self.assertEqual(self.fi.a.im_class, self.f)
+ self.cannot_set_attr(self.f.a, "im_class", self.f, TypeError)
+ self.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)
+ self.cannot_set_attr(self.f.b, "im_func", self.b, TypeError)
+ self.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)
+ self.cannot_set_attr(self.f.a, "im_self", None, TypeError)
+ self.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
+ self.cannot_set_attr(self.f.id, 'unknown_attr', 2, AttributeError)
+ self.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):
+ # setting attributes only works on function objects
+ 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_existent_attr
+ except AttributeError:
+ pass
+ else:
+ self.fail("using unknown attributes should raise "
+ "AttributeError")
+
+
+class FunctionDictsTest(FuncAttrsTest):
+ def test_setting_dict_to_invalid(self):
+ self.cannot_set_attr(self.b, '__dict__', None, TypeError)
+ self.cannot_set_attr(self.b, 'func_dict', None, TypeError)
+ from UserDict import UserDict
+ d = UserDict({'known_attr': 7})
+ self.cannot_set_attr(self.f.a.im_func, '__dict__', d, TypeError)
+ self.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.assertIs(d, self.b.__dict__)
+ self.assertIs(d, self.b.func_dict)
+ # ... and on all the different ways of referencing the method's func
+ self.assertIs(d, self.f.a.im_func.__dict__)
+ self.assertIs(d, self.f.a.__dict__)
+ self.assertIs(d, self.fi.a.im_func.__dict__)
+ self.assertIs(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)
+ self.cannot_set_attr(self.f.a, "__doc__", docstr, AttributeError)
+ 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)
+ 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)
+
+
+class StaticMethodAttrsTest(unittest.TestCase):
+ def test_func_attribute(self):
+ def f():
+ pass
+
+ c = classmethod(f)
+ self.assertTrue(c.__func__ is f)
+
+ s = staticmethod(f)
+ self.assertTrue(s.__func__ is f)
+
+
+def test_main():
+ test_support.run_unittest(FunctionPropertiesTest, InstancemethodAttrTest,
+ ArbitraryFunctionAttrTest, FunctionDictsTest,
+ FunctionDocstringTest,
+ StaticMethodAttrsTest)
+
+if __name__ == "__main__":
+ test_main()
--
Repository URL: http://hg.python.org/jython
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