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import unittest
from collections import OrderedDict, UserDict
from types import MappingProxyType
from test import support
from test.support import import_helper
_testcapi = import_helper.import_module("_testcapi")
_testlimitedcapi = import_helper.import_module("_testlimitedcapi")
NULL = None
INVALID_UTF8 = b'\xff'
class DictSubclass(dict):
def __getitem__(self, key):
raise RuntimeError('do not get evil')
def __setitem__(self, key, value):
raise RuntimeError('do not set evil')
def __delitem__(self, key):
raise RuntimeError('do not del evil')
def gen():
yield 'a'
yield 'b'
yield 'c'
class CAPITest(unittest.TestCase):
def test_dict_check(self):
check = _testlimitedcapi.dict_check
self.assertTrue(check({1: 2}))
self.assertTrue(check(OrderedDict({1: 2})))
self.assertFalse(check(UserDict({1: 2})))
self.assertFalse(check([1, 2]))
self.assertFalse(check(object()))
# CRASHES check(NULL)
def test_dict_checkexact(self):
check = _testlimitedcapi.dict_checkexact
self.assertTrue(check({1: 2}))
self.assertFalse(check(OrderedDict({1: 2})))
self.assertFalse(check(UserDict({1: 2})))
self.assertFalse(check([1, 2]))
self.assertFalse(check(object()))
# CRASHES check(NULL)
def test_dict_new(self):
dict_new = _testlimitedcapi.dict_new
dct = dict_new()
self.assertEqual(dct, {})
self.assertIs(type(dct), dict)
dct2 = dict_new()
self.assertIsNot(dct2, dct)
def test_dictproxy_new(self):
dictproxy_new = _testlimitedcapi.dictproxy_new
for dct in {1: 2}, OrderedDict({1: 2}), UserDict({1: 2}):
proxy = dictproxy_new(dct)
self.assertIs(type(proxy), MappingProxyType)
self.assertEqual(proxy, dct)
with self.assertRaises(TypeError):
proxy[1] = 3
self.assertEqual(proxy[1], 2)
dct[1] = 4
self.assertEqual(proxy[1], 4)
self.assertRaises(TypeError, dictproxy_new, [])
self.assertRaises(TypeError, dictproxy_new, 42)
# CRASHES dictproxy_new(NULL)
def test_dict_copy(self):
copy = _testlimitedcapi.dict_copy
for dct in {1: 2}, OrderedDict({1: 2}):
dct_copy = copy(dct)
self.assertIs(type(dct_copy), dict)
self.assertEqual(dct_copy, dct)
self.assertRaises(SystemError, copy, UserDict())
self.assertRaises(SystemError, copy, [])
self.assertRaises(SystemError, copy, 42)
self.assertRaises(SystemError, copy, NULL)
def test_dict_clear(self):
clear = _testlimitedcapi.dict_clear
dct = {1: 2}
clear(dct)
self.assertEqual(dct, {})
# NOTE: It is not safe to call it with OrderedDict.
# Has no effect for non-dicts.
dct = UserDict({1: 2})
clear(dct)
self.assertEqual(dct, {1: 2})
lst = [1, 2]
clear(lst)
self.assertEqual(lst, [1, 2])
clear(object())
# CRASHES? clear(NULL)
def test_dict_size(self):
size = _testlimitedcapi.dict_size
self.assertEqual(size({1: 2}), 1)
self.assertEqual(size(OrderedDict({1: 2})), 1)
self.assertRaises(SystemError, size, UserDict())
self.assertRaises(SystemError, size, [])
self.assertRaises(SystemError, size, 42)
self.assertRaises(SystemError, size, object())
self.assertRaises(SystemError, size, NULL)
def test_dict_getitem(self):
getitem = _testlimitedcapi.dict_getitem
dct = {'a': 1, '\U0001f40d': 2}
self.assertEqual(getitem(dct, 'a'), 1)
self.assertIs(getitem(dct, 'b'), KeyError)
self.assertEqual(getitem(dct, '\U0001f40d'), 2)
dct2 = DictSubclass(dct)
self.assertEqual(getitem(dct2, 'a'), 1)
self.assertIs(getitem(dct2, 'b'), KeyError)
with support.catch_unraisable_exception() as cm:
self.assertIs(getitem({}, []), KeyError) # unhashable
self.assertEqual(cm.unraisable.exc_type, TypeError)
self.assertEqual(str(cm.unraisable.exc_value),
"unhashable type: 'list'")
self.assertIs(getitem(42, 'a'), KeyError)
self.assertIs(getitem([1], 0), KeyError)
# CRASHES getitem({}, NULL)
# CRASHES getitem(NULL, 'a')
def test_dict_getitemstring(self):
getitemstring = _testlimitedcapi.dict_getitemstring
dct = {'a': 1, '\U0001f40d': 2}
self.assertEqual(getitemstring(dct, b'a'), 1)
self.assertIs(getitemstring(dct, b'b'), KeyError)
self.assertEqual(getitemstring(dct, '\U0001f40d'.encode()), 2)
dct2 = DictSubclass(dct)
self.assertEqual(getitemstring(dct2, b'a'), 1)
self.assertIs(getitemstring(dct2, b'b'), KeyError)
with support.catch_unraisable_exception() as cm:
self.assertIs(getitemstring({}, INVALID_UTF8), KeyError)
self.assertEqual(cm.unraisable.exc_type, UnicodeDecodeError)
self.assertRegex(str(cm.unraisable.exc_value),
"'utf-8' codec can't decode")
self.assertIs(getitemstring(42, b'a'), KeyError)
self.assertIs(getitemstring([], b'a'), KeyError)
# CRASHES getitemstring({}, NULL)
# CRASHES getitemstring(NULL, b'a')
def test_dict_getitemref(self):
getitem = _testcapi.dict_getitemref
dct = {'a': 1, '\U0001f40d': 2}
self.assertEqual(getitem(dct, 'a'), 1)
self.assertIs(getitem(dct, 'b'), KeyError)
self.assertEqual(getitem(dct, '\U0001f40d'), 2)
dct2 = DictSubclass(dct)
self.assertEqual(getitem(dct2, 'a'), 1)
self.assertIs(getitem(dct2, 'b'), KeyError)
self.assertRaises(SystemError, getitem, 42, 'a')
self.assertRaises(TypeError, getitem, {}, []) # unhashable
self.assertRaises(SystemError, getitem, [], 1)
self.assertRaises(SystemError, getitem, [], 'a')
# CRASHES getitem({}, NULL)
# CRASHES getitem(NULL, 'a')
def test_dict_getitemstringref(self):
getitemstring = _testcapi.dict_getitemstringref
dct = {'a': 1, '\U0001f40d': 2}
self.assertEqual(getitemstring(dct, b'a'), 1)
self.assertIs(getitemstring(dct, b'b'), KeyError)
self.assertEqual(getitemstring(dct, '\U0001f40d'.encode()), 2)
dct2 = DictSubclass(dct)
self.assertEqual(getitemstring(dct2, b'a'), 1)
self.assertIs(getitemstring(dct2, b'b'), KeyError)
self.assertRaises(SystemError, getitemstring, 42, b'a')
self.assertRaises(UnicodeDecodeError, getitemstring, {}, INVALID_UTF8)
self.assertRaises(SystemError, getitemstring, [], b'a')
# CRASHES getitemstring({}, NULL)
# CRASHES getitemstring(NULL, b'a')
def test_dict_getitemwitherror(self):
getitem = _testlimitedcapi.dict_getitemwitherror
dct = {'a': 1, '\U0001f40d': 2}
self.assertEqual(getitem(dct, 'a'), 1)
self.assertIs(getitem(dct, 'b'), KeyError)
self.assertEqual(getitem(dct, '\U0001f40d'), 2)
dct2 = DictSubclass(dct)
self.assertEqual(getitem(dct2, 'a'), 1)
self.assertIs(getitem(dct2, 'b'), KeyError)
self.assertRaises(SystemError, getitem, 42, 'a')
self.assertRaises(TypeError, getitem, {}, []) # unhashable
self.assertRaises(SystemError, getitem, [], 1)
self.assertRaises(SystemError, getitem, [], 'a')
# CRASHES getitem({}, NULL)
# CRASHES getitem(NULL, 'a')
def test_dict_contains(self):
contains = _testlimitedcapi.dict_contains
dct = {'a': 1, '\U0001f40d': 2}
self.assertTrue(contains(dct, 'a'))
self.assertFalse(contains(dct, 'b'))
self.assertTrue(contains(dct, '\U0001f40d'))
dct2 = DictSubclass(dct)
self.assertTrue(contains(dct2, 'a'))
self.assertFalse(contains(dct2, 'b'))
self.assertRaises(TypeError, contains, {}, []) # unhashable
# CRASHES contains({}, NULL)
# CRASHES contains(UserDict(), 'a')
# CRASHES contains(42, 'a')
# CRASHES contains(NULL, 'a')
def test_dict_contains_string(self):
contains_string = _testcapi.dict_containsstring
dct = {'a': 1, '\U0001f40d': 2}
self.assertTrue(contains_string(dct, b'a'))
self.assertFalse(contains_string(dct, b'b'))
self.assertTrue(contains_string(dct, '\U0001f40d'.encode()))
self.assertRaises(UnicodeDecodeError, contains_string, dct, INVALID_UTF8)
dct2 = DictSubclass(dct)
self.assertTrue(contains_string(dct2, b'a'))
self.assertFalse(contains_string(dct2, b'b'))
# CRASHES contains({}, NULL)
# CRASHES contains(NULL, b'a')
def test_dict_setitem(self):
setitem = _testlimitedcapi.dict_setitem
dct = {}
setitem(dct, 'a', 5)
self.assertEqual(dct, {'a': 5})
setitem(dct, '\U0001f40d', 8)
self.assertEqual(dct, {'a': 5, '\U0001f40d': 8})
dct2 = DictSubclass()
setitem(dct2, 'a', 5)
self.assertEqual(dct2, {'a': 5})
self.assertRaises(TypeError, setitem, {}, [], 5) # unhashable
self.assertRaises(SystemError, setitem, UserDict(), 'a', 5)
self.assertRaises(SystemError, setitem, [1], 0, 5)
self.assertRaises(SystemError, setitem, 42, 'a', 5)
# CRASHES setitem({}, NULL, 5)
# CRASHES setitem({}, 'a', NULL)
# CRASHES setitem(NULL, 'a', 5)
def test_dict_setitemstring(self):
setitemstring = _testlimitedcapi.dict_setitemstring
dct = {}
setitemstring(dct, b'a', 5)
self.assertEqual(dct, {'a': 5})
setitemstring(dct, '\U0001f40d'.encode(), 8)
self.assertEqual(dct, {'a': 5, '\U0001f40d': 8})
dct2 = DictSubclass()
setitemstring(dct2, b'a', 5)
self.assertEqual(dct2, {'a': 5})
self.assertRaises(UnicodeDecodeError, setitemstring, {}, INVALID_UTF8, 5)
self.assertRaises(SystemError, setitemstring, UserDict(), b'a', 5)
self.assertRaises(SystemError, setitemstring, 42, b'a', 5)
# CRASHES setitemstring({}, NULL, 5)
# CRASHES setitemstring({}, b'a', NULL)
# CRASHES setitemstring(NULL, b'a', 5)
def test_dict_delitem(self):
delitem = _testlimitedcapi.dict_delitem
dct = {'a': 1, 'c': 2, '\U0001f40d': 3}
delitem(dct, 'a')
self.assertEqual(dct, {'c': 2, '\U0001f40d': 3})
self.assertRaises(KeyError, delitem, dct, 'b')
delitem(dct, '\U0001f40d')
self.assertEqual(dct, {'c': 2})
dct2 = DictSubclass({'a': 1, 'c': 2})
delitem(dct2, 'a')
self.assertEqual(dct2, {'c': 2})
self.assertRaises(KeyError, delitem, dct2, 'b')
self.assertRaises(TypeError, delitem, {}, []) # unhashable
self.assertRaises(SystemError, delitem, UserDict({'a': 1}), 'a')
self.assertRaises(SystemError, delitem, [1], 0)
self.assertRaises(SystemError, delitem, 42, 'a')
# CRASHES delitem({}, NULL)
# CRASHES delitem(NULL, 'a')
def test_dict_delitemstring(self):
delitemstring = _testlimitedcapi.dict_delitemstring
dct = {'a': 1, 'c': 2, '\U0001f40d': 3}
delitemstring(dct, b'a')
self.assertEqual(dct, {'c': 2, '\U0001f40d': 3})
self.assertRaises(KeyError, delitemstring, dct, b'b')
delitemstring(dct, '\U0001f40d'.encode())
self.assertEqual(dct, {'c': 2})
dct2 = DictSubclass({'a': 1, 'c': 2})
delitemstring(dct2, b'a')
self.assertEqual(dct2, {'c': 2})
self.assertRaises(KeyError, delitemstring, dct2, b'b')
self.assertRaises(UnicodeDecodeError, delitemstring, {}, INVALID_UTF8)
self.assertRaises(SystemError, delitemstring, UserDict({'a': 1}), b'a')
self.assertRaises(SystemError, delitemstring, 42, b'a')
# CRASHES delitemstring({}, NULL)
# CRASHES delitemstring(NULL, b'a')
def test_dict_setdefault(self):
setdefault = _testcapi.dict_setdefault
dct = {}
self.assertEqual(setdefault(dct, 'a', 5), 5)
self.assertEqual(dct, {'a': 5})
self.assertEqual(setdefault(dct, 'a', 8), 5)
self.assertEqual(dct, {'a': 5})
dct2 = DictSubclass()
self.assertEqual(setdefault(dct2, 'a', 5), 5)
self.assertEqual(dct2, {'a': 5})
self.assertEqual(setdefault(dct2, 'a', 8), 5)
self.assertEqual(dct2, {'a': 5})
self.assertRaises(TypeError, setdefault, {}, [], 5) # unhashable
self.assertRaises(SystemError, setdefault, UserDict(), 'a', 5)
self.assertRaises(SystemError, setdefault, [1], 0, 5)
self.assertRaises(SystemError, setdefault, 42, 'a', 5)
# CRASHES setdefault({}, NULL, 5)
# CRASHES setdefault({}, 'a', NULL)
# CRASHES setdefault(NULL, 'a', 5)
def test_dict_setdefaultref(self):
setdefault = _testcapi.dict_setdefaultref
dct = {}
self.assertEqual(setdefault(dct, 'a', 5), 5)
self.assertEqual(dct, {'a': 5})
self.assertEqual(setdefault(dct, 'a', 8), 5)
self.assertEqual(dct, {'a': 5})
dct2 = DictSubclass()
self.assertEqual(setdefault(dct2, 'a', 5), 5)
self.assertEqual(dct2, {'a': 5})
self.assertEqual(setdefault(dct2, 'a', 8), 5)
self.assertEqual(dct2, {'a': 5})
self.assertRaises(TypeError, setdefault, {}, [], 5) # unhashable
self.assertRaises(SystemError, setdefault, UserDict(), 'a', 5)
self.assertRaises(SystemError, setdefault, [1], 0, 5)
self.assertRaises(SystemError, setdefault, 42, 'a', 5)
# CRASHES setdefault({}, NULL, 5)
# CRASHES setdefault({}, 'a', NULL)
# CRASHES setdefault(NULL, 'a', 5)
def test_mapping_keys_valuesitems(self):
class BadMapping(dict):
def keys(self):
return None
def values(self):
return None
def items(self):
return None
dict_obj = {'foo': 1, 'bar': 2, 'spam': 3}
for mapping in [dict_obj, DictSubclass(dict_obj), BadMapping(dict_obj)]:
self.assertListEqual(_testlimitedcapi.dict_keys(mapping),
list(dict_obj.keys()))
self.assertListEqual(_testlimitedcapi.dict_values(mapping),
list(dict_obj.values()))
self.assertListEqual(_testlimitedcapi.dict_items(mapping),
list(dict_obj.items()))
def test_dict_keys_valuesitems_bad_arg(self):
for mapping in UserDict(), [], object():
self.assertRaises(SystemError, _testlimitedcapi.dict_keys, mapping)
self.assertRaises(SystemError, _testlimitedcapi.dict_values, mapping)
self.assertRaises(SystemError, _testlimitedcapi.dict_items, mapping)
def test_dict_next(self):
dict_next = _testlimitedcapi.dict_next
self.assertIsNone(dict_next({}, 0))
dct = {'a': 1, 'b': 2, 'c': 3}
pos = 0
pairs = []
while True:
res = dict_next(dct, pos)
if res is None:
break
rc, pos, key, value = res
self.assertEqual(rc, 1)
pairs.append((key, value))
self.assertEqual(pairs, list(dct.items()))
# CRASHES dict_next(NULL, 0)
def test_dict_update(self):
update = _testlimitedcapi.dict_update
for cls1 in dict, DictSubclass:
for cls2 in dict, DictSubclass, UserDict:
dct = cls1({'a': 1, 'b': 2})
update(dct, cls2({'b': 3, 'c': 4}))
self.assertEqual(dct, {'a': 1, 'b': 3, 'c': 4})
self.assertRaises(AttributeError, update, {}, [])
self.assertRaises(AttributeError, update, {}, 42)
self.assertRaises(SystemError, update, UserDict(), {})
self.assertRaises(SystemError, update, 42, {})
self.assertRaises(SystemError, update, {}, NULL)
self.assertRaises(SystemError, update, NULL, {})
def test_dict_merge(self):
merge = _testlimitedcapi.dict_merge
for cls1 in dict, DictSubclass:
for cls2 in dict, DictSubclass, UserDict:
dct = cls1({'a': 1, 'b': 2})
merge(dct, cls2({'b': 3, 'c': 4}), 0)
self.assertEqual(dct, {'a': 1, 'b': 2, 'c': 4})
dct = cls1({'a': 1, 'b': 2})
merge(dct, cls2({'b': 3, 'c': 4}), 1)
self.assertEqual(dct, {'a': 1, 'b': 3, 'c': 4})
self.assertRaises(AttributeError, merge, {}, [], 0)
self.assertRaises(AttributeError, merge, {}, 42, 0)
self.assertRaises(SystemError, merge, UserDict(), {}, 0)
self.assertRaises(SystemError, merge, 42, {}, 0)
self.assertRaises(SystemError, merge, {}, NULL, 0)
self.assertRaises(SystemError, merge, NULL, {}, 0)
def test_dict_mergefromseq2(self):
mergefromseq2 = _testlimitedcapi.dict_mergefromseq2
for cls1 in dict, DictSubclass:
for cls2 in list, iter:
dct = cls1({'a': 1, 'b': 2})
mergefromseq2(dct, cls2([('b', 3), ('c', 4)]), 0)
self.assertEqual(dct, {'a': 1, 'b': 2, 'c': 4})
dct = cls1({'a': 1, 'b': 2})
mergefromseq2(dct, cls2([('b', 3), ('c', 4)]), 1)
self.assertEqual(dct, {'a': 1, 'b': 3, 'c': 4})
self.assertRaises(ValueError, mergefromseq2, {}, [(1,)], 0)
self.assertRaises(ValueError, mergefromseq2, {}, [(1, 2, 3)], 0)
self.assertRaises(TypeError, mergefromseq2, {}, [1], 0)
self.assertRaises(TypeError, mergefromseq2, {}, 42, 0)
# CRASHES mergefromseq2(UserDict(), [], 0)
# CRASHES mergefromseq2(42, [], 0)
# CRASHES mergefromseq2({}, NULL, 0)
# CRASHES mergefromseq2(NULL, {}, 0)
def test_dict_pop(self):
# Test PyDict_Pop()
dict_pop = _testcapi.dict_pop
dict_pop_null = _testcapi.dict_pop_null
# key present, get removed value
mydict = {"key": "value", "key2": "value2"}
self.assertEqual(dict_pop(mydict, "key"), (1, "value"))
self.assertEqual(mydict, {"key2": "value2"})
self.assertEqual(dict_pop(mydict, "key2"), (1, "value2"))
self.assertEqual(mydict, {})
# key present, ignore removed value
mydict = {"key": "value", "key2": "value2"}
self.assertEqual(dict_pop_null(mydict, "key"), 1)
self.assertEqual(mydict, {"key2": "value2"})
self.assertEqual(dict_pop_null(mydict, "key2"), 1)
self.assertEqual(mydict, {})
# key missing, expect removed value; empty dict has a fast path
self.assertEqual(dict_pop({}, "key"), (0, NULL))
self.assertEqual(dict_pop({"a": 1}, "key"), (0, NULL))
# key missing, ignored removed value; empty dict has a fast path
self.assertEqual(dict_pop_null({}, "key"), 0)
self.assertEqual(dict_pop_null({"a": 1}, "key"), 0)
# dict error
not_dict = UserDict({1: 2})
self.assertRaises(SystemError, dict_pop, not_dict, "key")
self.assertRaises(SystemError, dict_pop_null, not_dict, "key")
# key error; don't hash key if dict is empty
not_hashable_key = ["list"]
self.assertEqual(dict_pop({}, not_hashable_key), (0, NULL))
with self.assertRaises(TypeError):
dict_pop({'key': 1}, not_hashable_key)
dict_pop({}, NULL) # key is not checked if dict is empty
# CRASHES dict_pop(NULL, "key")
# CRASHES dict_pop({"a": 1}, NULL)
def test_dict_popstring(self):
# Test PyDict_PopString()
dict_popstring = _testcapi.dict_popstring
dict_popstring_null = _testcapi.dict_popstring_null
# key present, get removed value
mydict = {"key": "value", "key2": "value2"}
self.assertEqual(dict_popstring(mydict, "key"), (1, "value"))
self.assertEqual(mydict, {"key2": "value2"})
self.assertEqual(dict_popstring(mydict, "key2"), (1, "value2"))
self.assertEqual(mydict, {})
# key present, ignore removed value
mydict = {"key": "value", "key2": "value2"}
self.assertEqual(dict_popstring_null(mydict, "key"), 1)
self.assertEqual(mydict, {"key2": "value2"})
self.assertEqual(dict_popstring_null(mydict, "key2"), 1)
self.assertEqual(mydict, {})
# key missing; empty dict has a fast path
self.assertEqual(dict_popstring({}, "key"), (0, NULL))
self.assertEqual(dict_popstring_null({}, "key"), 0)
self.assertEqual(dict_popstring({"a": 1}, "key"), (0, NULL))
self.assertEqual(dict_popstring_null({"a": 1}, "key"), 0)
# non-ASCII key
non_ascii = '\U0001f40d'
dct = {'\U0001f40d': 123}
self.assertEqual(dict_popstring(dct, '\U0001f40d'.encode()), (1, 123))
dct = {'\U0001f40d': 123}
self.assertEqual(dict_popstring_null(dct, '\U0001f40d'.encode()), 1)
# dict error
not_dict = UserDict({1: 2})
self.assertRaises(SystemError, dict_popstring, not_dict, "key")
self.assertRaises(SystemError, dict_popstring_null, not_dict, "key")
# key error
self.assertRaises(UnicodeDecodeError, dict_popstring, {1: 2}, INVALID_UTF8)
self.assertRaises(UnicodeDecodeError, dict_popstring_null, {1: 2}, INVALID_UTF8)
# CRASHES dict_popstring(NULL, "key")
# CRASHES dict_popstring({}, NULL)
# CRASHES dict_popstring({"a": 1}, NULL)
if __name__ == "__main__":
unittest.main()
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