/usr/lib/python2.7/test/test_funcattrs.py is in libpython2.7-testsuite 2.7.11-7ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 | 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()
|