diff options
Diffstat (limited to 'lib/python2.7/test/test_funcattrs.py')
| -rw-r--r-- | lib/python2.7/test/test_funcattrs.py | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/lib/python2.7/test/test_funcattrs.py b/lib/python2.7/test/test_funcattrs.py deleted file mode 100644 index b639ca2..0000000 --- a/lib/python2.7/test/test_funcattrs.py +++ /dev/null @@ -1,353 +0,0 @@ -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() |