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test_ordered_dict.py
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import builtins import contextlib import copy import gc import pickle from random import randrange, shuffle import struct import sys import unittest import weakref from collections.abc import MutableMapping from test import mapping_tests, support from test.support import import_helper py_coll = import_helper.import_fresh_module('collections', blocked=['_collections']) c_coll = import_helper.import_fresh_module('collections', fresh=['_collections']) @contextlib.contextmanager def replaced_module(name, replacement): original_module = sys.modules[name] sys.modules[name] = replacement try: yield finally: sys.modules[name] = original_module class OrderedDictTests: def test_init(self): OrderedDict = self.OrderedDict with self.assertRaises(TypeError): OrderedDict([('a', 1), ('b', 2)], None) # too many args pairs = [('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5)] self.assertEqual(sorted(OrderedDict(dict(pairs)).items()), pairs) # dict input self.assertEqual(sorted(OrderedDict(**dict(pairs)).items()), pairs) # kwds input self.assertEqual(list(OrderedDict(pairs).items()), pairs) # pairs input self.assertEqual(list(OrderedDict([('a', 1), ('b', 2), ('c', 9), ('d', 4)], c=3, e=5).items()), pairs) # mixed input # make sure no positional args conflict with possible kwdargs self.assertEqual(list(OrderedDict(self=42).items()), [('self', 42)]) self.assertEqual(list(OrderedDict(other=42).items()), [('other', 42)]) self.assertRaises(TypeError, OrderedDict, 42) self.assertRaises(TypeError, OrderedDict, (), ()) self.assertRaises(TypeError, OrderedDict.__init__) # Make sure that direct calls to __init__ do not clear previous contents d = OrderedDict([('a', 1), ('b', 2), ('c', 3), ('d', 44), ('e', 55)]) d.__init__([('e', 5), ('f', 6)], g=7, d=4) self.assertEqual(list(d.items()), [('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5), ('f', 6), ('g', 7)]) def test_468(self): OrderedDict = self.OrderedDict items = [('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5), ('f', 6), ('g', 7)] shuffle(items) argdict = OrderedDict(items) d = OrderedDict(**argdict) self.assertEqual(list(d.items()), items) def test_update(self): OrderedDict = self.OrderedDict with self.assertRaises(TypeError): OrderedDict().update([('a', 1), ('b', 2)], None) # too many args pairs = [('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5)] od = OrderedDict() od.update(dict(pairs)) self.assertEqual(sorted(od.items()), pairs) # dict input od = OrderedDict() od.update(**dict(pairs)) self.assertEqual(sorted(od.items()), pairs) # kwds input od = OrderedDict() od.update(pairs) self.assertEqual(list(od.items()), pairs) # pairs input od = OrderedDict() od.update([('a', 1), ('b', 2), ('c', 9), ('d', 4)], c=3, e=5) self.assertEqual(list(od.items()), pairs) # mixed input # Issue 9137: Named argument called 'other' or 'self' # shouldn't be treated specially. od = OrderedDict() od.update(self=23) self.assertEqual(list(od.items()), [('self', 23)]) od = OrderedDict() od.update(other={}) self.assertEqual(list(od.items()), [('other', {})]) od = OrderedDict() od.update(red=5, blue=6, other=7, self=8) self.assertEqual(sorted(list(od.items())), [('blue', 6), ('other', 7), ('red', 5), ('self', 8)]) # Make sure that direct calls to update do not clear previous contents # add that updates items are not moved to the end d = OrderedDict([('a', 1), ('b', 2), ('c', 3), ('d', 44), ('e', 55)]) d.update([('e', 5), ('f', 6)], g=7, d=4) self.assertEqual(list(d.items()), [('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5), ('f', 6), ('g', 7)]) self.assertRaises(TypeError, OrderedDict().update, 42) self.assertRaises(TypeError, OrderedDict().update, (), ()) self.assertRaises(TypeError, OrderedDict.update) self.assertRaises(TypeError, OrderedDict().update, 42) self.assertRaises(TypeError, OrderedDict().update, (), ()) self.assertRaises(TypeError, OrderedDict.update) def test_init_calls(self): calls = [] class Spam: def keys(self): calls.append('keys') return () def items(self): calls.append('items') return () self.OrderedDict(Spam()) self.assertEqual(calls, ['keys']) def test_fromkeys(self): OrderedDict = self.OrderedDict od = OrderedDict.fromkeys('abc') self.assertEqual(list(od.items()), [(c, None) for c in 'abc']) od = OrderedDict.fromkeys('abc', value=None) self.assertEqual(list(od.items()), [(c, None) for c in 'abc']) od = OrderedDict.fromkeys('abc', value=0) self.assertEqual(list(od.items()), [(c, 0) for c in 'abc']) def test_abc(self): OrderedDict = self.OrderedDict self.assertIsInstance(OrderedDict(), MutableMapping) self.assertTrue(issubclass(OrderedDict, MutableMapping)) def test_clear(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] shuffle(pairs) od = OrderedDict(pairs) self.assertEqual(len(od), len(pairs)) od.clear() self.assertEqual(len(od), 0) def test_delitem(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] od = OrderedDict(pairs) del od['a'] self.assertNotIn('a', od) with self.assertRaises(KeyError): del od['a'] self.assertEqual(list(od.items()), pairs[:2] + pairs[3:]) def test_setitem(self): OrderedDict = self.OrderedDict od = OrderedDict([('d', 1), ('b', 2), ('c', 3), ('a', 4), ('e', 5)]) od['c'] = 10 # existing element od['f'] = 20 # new element self.assertEqual(list(od.items()), [('d', 1), ('b', 2), ('c', 10), ('a', 4), ('e', 5), ('f', 20)]) def test_iterators(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] shuffle(pairs) od = OrderedDict(pairs) self.assertEqual(list(od), [t[0] for t in pairs]) self.assertEqual(list(od.keys()), [t[0] for t in pairs]) self.assertEqual(list(od.values()), [t[1] for t in pairs]) self.assertEqual(list(od.items()), pairs) self.assertEqual(list(reversed(od)), [t[0] for t in reversed(pairs)]) self.assertEqual(list(reversed(od.keys())), [t[0] for t in reversed(pairs)]) self.assertEqual(list(reversed(od.values())), [t[1] for t in reversed(pairs)]) self.assertEqual(list(reversed(od.items())), list(reversed(pairs))) def test_detect_deletion_during_iteration(self): OrderedDict = self.OrderedDict od = OrderedDict.fromkeys('abc') it = iter(od) key = next(it) del od[key] with self.assertRaises(Exception): # Note, the exact exception raised is not guaranteed # The only guarantee that the next() will not succeed next(it) def test_sorted_iterators(self): OrderedDict = self.OrderedDict with self.assertRaises(TypeError): OrderedDict([('a', 1), ('b', 2)], None) pairs = [('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5)] od = OrderedDict(pairs) self.assertEqual(sorted(od), [t[0] for t in pairs]) self.assertEqual(sorted(od.keys()), [t[0] for t in pairs]) self.assertEqual(sorted(od.values()), [t[1] for t in pairs]) self.assertEqual(sorted(od.items()), pairs) self.assertEqual(sorted(reversed(od)), sorted([t[0] for t in reversed(pairs)])) def test_iterators_empty(self): OrderedDict = self.OrderedDict od = OrderedDict() empty = [] self.assertEqual(list(od), empty) self.assertEqual(list(od.keys()), empty) self.assertEqual(list(od.values()), empty) self.assertEqual(list(od.items()), empty) self.assertEqual(list(reversed(od)), empty) self.assertEqual(list(reversed(od.keys())), empty) self.assertEqual(list(reversed(od.values())), empty) self.assertEqual(list(reversed(od.items())), empty) def test_popitem(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] shuffle(pairs) od = OrderedDict(pairs) while pairs: self.assertEqual(od.popitem(), pairs.pop()) with self.assertRaises(KeyError): od.popitem() self.assertEqual(len(od), 0) def test_popitem_last(self): OrderedDict = self.OrderedDict pairs = [(i, i) for i in range(30)] obj = OrderedDict(pairs) for i in range(8): obj.popitem(True) obj.popitem(True) obj.popitem(last=True) self.assertEqual(len(obj), 20) def test_pop(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] shuffle(pairs) od = OrderedDict(pairs) shuffle(pairs) while pairs: k, v = pairs.pop() self.assertEqual(od.pop(k), v) with self.assertRaises(KeyError): od.pop('xyz') self.assertEqual(len(od), 0) self.assertEqual(od.pop(k, 12345), 12345) # make sure pop still works when __missing__ is defined class Missing(OrderedDict): def __missing__(self, key): return 0 m = Missing(a=1) self.assertEqual(m.pop('b', 5), 5) self.assertEqual(m.pop('a', 6), 1) self.assertEqual(m.pop('a', 6), 6) self.assertEqual(m.pop('a', default=6), 6) with self.assertRaises(KeyError): m.pop('a') def test_equality(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] shuffle(pairs) od1 = OrderedDict(pairs) od2 = OrderedDict(pairs) self.assertEqual(od1, od2) # same order implies equality pairs = pairs[2:] + pairs[:2] od2 = OrderedDict(pairs) self.assertNotEqual(od1, od2) # different order implies inequality # comparison to regular dict is not order sensitive self.assertEqual(od1, dict(od2)) self.assertEqual(dict(od2), od1) # different length implied inequality self.assertNotEqual(od1, OrderedDict(pairs[:-1])) def test_copying(self): OrderedDict = self.OrderedDict # Check that ordered dicts are copyable, deepcopyable, picklable, # and have a repr/eval round-trip pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] od = OrderedDict(pairs) def check(dup): msg = "\ncopy: %s\nod: %s" % (dup, od) self.assertIsNot(dup, od, msg) self.assertEqual(dup, od) self.assertEqual(list(dup.items()), list(od.items())) self.assertEqual(len(dup), len(od)) self.assertEqual(type(dup), type(od)) check(od.copy()) check(copy.copy(od)) check(copy.deepcopy(od)) # pickle directly pulls the module, so we have to fake it with replaced_module('collections', self.module): for proto in range(pickle.HIGHEST_PROTOCOL + 1): with self.subTest(proto=proto): check(pickle.loads(pickle.dumps(od, proto))) check(eval(repr(od))) update_test = OrderedDict() update_test.update(od) check(update_test) check(OrderedDict(od)) def test_yaml_linkage(self): OrderedDict = self.OrderedDict # Verify that __reduce__ is setup in a way that supports PyYAML's dump() feature. # In yaml, lists are native but tuples are not. pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] od = OrderedDict(pairs) # yaml.dump(od) --> # '!!python/object/apply:__main__.OrderedDict\n- - [a, 1]\n - [b, 2]\n' self.assertTrue(all(type(pair)==list for pair in od.__reduce__()[1])) def test_reduce_not_too_fat(self): OrderedDict = self.OrderedDict # do not save instance dictionary if not needed pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] od = OrderedDict(pairs) self.assertIsInstance(od.__dict__, dict) self.assertIsNone(od.__reduce__()[2]) od.x = 10 self.assertEqual(od.__dict__['x'], 10) self.assertEqual(od.__reduce__()[2], {'x': 10}) def test_pickle_recursive(self): OrderedDict = self.OrderedDict od = OrderedDict() od[1] = od # pickle directly pulls the module, so we have to fake it with replaced_module('collections', self.module): for proto in range(-1, pickle.HIGHEST_PROTOCOL + 1): dup = pickle.loads(pickle.dumps(od, proto)) self.assertIsNot(dup, od) self.assertEqual(list(dup.keys()), [1]) self.assertIs(dup[1], dup) def test_repr(self): OrderedDict = self.OrderedDict od = OrderedDict([('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)]) self.assertEqual(repr(od), "OrderedDict([('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)])") self.assertEqual(eval(repr(od)), od) self.assertEqual(repr(OrderedDict()), "OrderedDict()") def test_repr_recursive(self): OrderedDict = self.OrderedDict # See issue #9826 od = OrderedDict.fromkeys('abc') od['x'] = od self.assertEqual(repr(od), "OrderedDict([('a', None), ('b', None), ('c', None), ('x', ...)])") def test_repr_recursive_values(self): OrderedDict = self.OrderedDict od = OrderedDict() od[42] = od.values() r = repr(od) # Cannot perform a stronger test, as the contents of the repr # are implementation-dependent. All we can say is that we # want a str result, not an exception of any sort. self.assertIsInstance(r, str) od[42] = od.items() r = repr(od) # Again. self.assertIsInstance(r, str) def test_setdefault(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] shuffle(pairs) od = OrderedDict(pairs) pair_order = list(od.items()) self.assertEqual(od.setdefault('a', 10), 3) # make sure order didn't change self.assertEqual(list(od.items()), pair_order) self.assertEqual(od.setdefault('x', 10), 10) # make sure 'x' is added to the end self.assertEqual(list(od.items())[-1], ('x', 10)) self.assertEqual(od.setdefault('g', default=9), 9) # make sure setdefault still works when __missing__ is defined class Missing(OrderedDict): def __missing__(self, key): return 0 self.assertEqual(Missing().setdefault(5, 9), 9) def test_reinsert(self): OrderedDict = self.OrderedDict # Given insert a, insert b, delete a, re-insert a, # verify that a is now later than b. od = OrderedDict() od['a'] = 1 od['b'] = 2 del od['a'] self.assertEqual(list(od.items()), [('b', 2)]) od['a'] = 1 self.assertEqual(list(od.items()), [('b', 2), ('a', 1)]) def test_move_to_end(self): OrderedDict = self.OrderedDict od = OrderedDict.fromkeys('abcde') self.assertEqual(list(od), list('abcde')) od.move_to_end('c') self.assertEqual(list(od), list('abdec')) od.move_to_end('c', False) self.assertEqual(list(od), list('cabde')) od.move_to_end('c', False) self.assertEqual(list(od), list('cabde')) od.move_to_end('e') self.assertEqual(list(od), list('cabde')) od.move_to_end('b', last=False) self.assertEqual(list(od), list('bcade')) with self.assertRaises(KeyError): od.move_to_end('x') with self.assertRaises(KeyError): od.move_to_end('x', False) def test_move_to_end_issue25406(self): OrderedDict = self.OrderedDict od = OrderedDict.fromkeys('abc') od.move_to_end('c', last=False) self.assertEqual(list(od), list('cab')) od.move_to_end('a', last=False) self.assertEqual(list(od), list('acb')) od = OrderedDict.fromkeys('abc') od.move_to_end('a') self.assertEqual(list(od), list('bca')) od.move_to_end('c') self.assertEqual(list(od), list('bac')) def test_sizeof(self): OrderedDict = self.OrderedDict # Wimpy test: Just verify the reported size is larger than a regular dict d = dict(a=1) od = OrderedDict(**d) self.assertGreater(sys.getsizeof(od), sys.getsizeof(d)) def test_views(self): OrderedDict = self.OrderedDict # See http://bugs.python.org/issue24286 s = 'the quick brown fox jumped over a lazy dog yesterday before dawn'.split() od = OrderedDict.fromkeys(s) self.assertEqual(od.keys(), dict(od).keys()) self.assertEqual(od.items(), dict(od).items()) def test_override_update(self): OrderedDict = self.OrderedDict # Verify that subclasses can override update() without breaking __init__() class MyOD(OrderedDict): def update(self, *args, **kwds): raise Exception() items = [('a', 1), ('c', 3), ('b', 2)] self.assertEqual(list(MyOD(items).items()), items) def test_highly_nested(self): # Issues 25395 and 35983: test that the trashcan mechanism works # correctly for OrderedDict: deleting a highly nested OrderDict # should not crash Python. OrderedDict = self.OrderedDict obj = None for _ in range(1000): obj = OrderedDict([(None, obj)]) del obj support.gc_collect() def test_highly_nested_subclass(self): # Issues 25395 and 35983: test that the trashcan mechanism works # correctly for OrderedDict: deleting a highly nested OrderDict # should not crash Python. OrderedDict = self.OrderedDict deleted = [] class MyOD(OrderedDict): def __del__(self): deleted.append(self.i) obj = None for i in range(100): obj = MyOD([(None, obj)]) obj.i = i del obj support.gc_collect() self.assertEqual(deleted, list(reversed(range(100)))) def test_delitem_hash_collision(self): OrderedDict = self.OrderedDict class Key: def __init__(self, hash): self._hash = hash self.value = str(id(self)) def __hash__(self): return self._hash def __eq__(self, other): try: return self.value == other.value except AttributeError: return False def __repr__(self): return self.value def blocking_hash(hash): # See the collision-handling in lookdict (in Objects/dictobject.c). MINSIZE = 8 i = (hash & MINSIZE-1) return (i << 2) + i + hash + 1 COLLIDING = 1 key = Key(COLLIDING) colliding = Key(COLLIDING) blocking = Key(blocking_hash(COLLIDING)) od = OrderedDict() od[key] = ... od[blocking] = ... od[colliding] = ... od['after'] = ... del od[blocking] del od[colliding] self.assertEqual(list(od.items()), [(key, ...), ('after', ...)]) def test_issue24347(self): OrderedDict = self.OrderedDict class Key: def __hash__(self): return randrange(100000) od = OrderedDict() for i in range(100): key = Key() od[key] = i # These should not crash. with self.assertRaises(KeyError): list(od.values()) with self.assertRaises(KeyError): list(od.items()) with self.assertRaises(KeyError): repr(od) with self.assertRaises(KeyError): od.copy() def test_issue24348(self): OrderedDict = self.OrderedDict class Key: def __hash__(self): return 1 od = OrderedDict() od[Key()] = 0 # This should not crash. od.popitem() def test_issue24667(self): """ dict resizes after a certain number of insertion operations, whether or not there were deletions that freed up slots in the hash table. During fast node lookup, OrderedDict must correctly respond to all resizes, even if the current "size" is the same as the old one. We verify that here by forcing a dict resize on a sparse odict and then perform an operation that should trigger an odict resize (e.g. popitem). One key aspect here is that we will keep the size of the odict the same at each popitem call. This verifies that we handled the dict resize properly. """ OrderedDict = self.OrderedDict od = OrderedDict() for c0 in '0123456789ABCDEF': for c1 in '0123456789ABCDEF': if len(od) == 4: # This should not raise a KeyError. od.popitem(last=False) key = c0 + c1 od[key] = key # Direct use of dict methods def test_dict_setitem(self): OrderedDict = self.OrderedDict od = OrderedDict() dict.__setitem__(od, 'spam', 1) self.assertNotIn('NULL', repr(od)) def test_dict_delitem(self): OrderedDict = self.OrderedDict od = OrderedDict() od['spam'] = 1 od['ham'] = 2 dict.__delitem__(od, 'spam') with self.assertRaises(KeyError): repr(od) def test_dict_clear(self): OrderedDict = self.OrderedDict od = OrderedDict() od['spam'] = 1 od['ham'] = 2 dict.clear(od) self.assertNotIn('NULL', repr(od)) def test_dict_pop(self): OrderedDict = self.OrderedDict od = OrderedDict() od['spam'] = 1 od['ham'] = 2 dict.pop(od, 'spam') with self.assertRaises(KeyError): repr(od) def test_dict_popitem(self): OrderedDict = self.OrderedDict od = OrderedDict() od['spam'] = 1 od['ham'] = 2 dict.popitem(od) with self.assertRaises(KeyError): repr(od) def test_dict_setdefault(self): OrderedDict = self.OrderedDict od = OrderedDict() dict.setdefault(od, 'spam', 1) self.assertNotIn('NULL', repr(od)) def test_dict_update(self): OrderedDict = self.OrderedDict od = OrderedDict() dict.update(od, [('spam', 1)]) self.assertNotIn('NULL', repr(od)) def test_reference_loop(self): # Issue 25935 OrderedDict = self.OrderedDict class A: od = OrderedDict() A.od[A] = None r = weakref.ref(A) del A gc.collect() self.assertIsNone(r()) def test_free_after_iterating(self): support.check_free_after_iterating(self, iter, self.OrderedDict) support.check_free_after_iterating(self, lambda d: iter(d.keys()), self.OrderedDict) support.check_free_after_iterating(self, lambda d: iter(d.values()), self.OrderedDict) support.check_free_after_iterating(self, lambda d: iter(d.items()), self.OrderedDict) def test_merge_operator(self): OrderedDict = self.OrderedDict a = OrderedDict({0: 0, 1: 1, 2: 1}) b = OrderedDict({1: 1, 2: 2, 3: 3}) c = a.copy() d = a.copy() c |= b d |= list(b.items()) expected = OrderedDict({0: 0, 1: 1, 2: 2, 3: 3}) self.assertEqual(a | dict(b), expected) self.assertEqual(a | b, expected) self.assertEqual(c, expected) self.assertEqual(d, expected) c = b.copy() c |= a expected = OrderedDict({1: 1, 2: 1, 3: 3, 0: 0}) self.assertEqual(dict(b) | a, expected) self.assertEqual(b | a, expected) self.assertEqual(c, expected) self.assertIs(type(a | b), OrderedDict) self.assertIs(type(dict(a) | b), OrderedDict) self.assertIs(type(a | dict(b)), OrderedDict) expected = a.copy() a |= () a |= "" self.assertEqual(a, expected) with self.assertRaises(TypeError): a | None with self.assertRaises(TypeError): a | () with self.assertRaises(TypeError): a | "BAD" with self.assertRaises(TypeError): a | "" with self.assertRaises(ValueError): a |= "BAD" @support.cpython_only def test_ordered_dict_items_result_gc(self): # bpo-42536: OrderedDict.items's tuple-reuse speed trick breaks the GC's # assumptions about what can be untracked. Make sure we re-track result # tuples whenever we reuse them. it = iter(self.OrderedDict({None: []}).items()) gc.collect() # That GC collection probably untracked the recycled internal result # tuple, which is initialized to (None, None). Make sure it's re-tracked # when it's mutated and returned from __next__: self.assertTrue(gc.is_tracked(next(it))) class PurePythonOrderedDictTests(OrderedDictTests, unittest.TestCase): module = py_coll OrderedDict = py_coll.OrderedDict class CPythonBuiltinDictTests(unittest.TestCase): """Builtin dict preserves insertion order. Reuse some of tests in OrderedDict selectively. """ module = builtins OrderedDict = dict for method in ( "test_init test_update test_abc test_clear test_delitem " + "test_setitem test_detect_deletion_during_iteration " + "test_popitem test_reinsert test_override_update " + "test_highly_nested test_highly_nested_subclass " + "test_delitem_hash_collision ").split(): setattr(CPythonBuiltinDictTests, method, getattr(OrderedDictTests, method)) del method @unittest.skipUnless(c_coll, 'requires the C version of the collections module') class CPythonOrderedDictTests(OrderedDictTests, unittest.TestCase): module = c_coll OrderedDict = c_coll.OrderedDict check_sizeof = support.check_sizeof @support.cpython_only def test_sizeof_exact(self): OrderedDict = self.OrderedDict calcsize = struct.calcsize size = support.calcobjsize check = self.check_sizeof basicsize = size('nQ2P' + '3PnPn2P') keysize = calcsize('2nP2n') entrysize = calcsize('n2P') p = calcsize('P') nodesize = calcsize('Pn2P') od = OrderedDict() check(od, basicsize) # 8byte indices + 8*2//3 * entry table od.x = 1 check(od, basicsize) od.update([(i, i) for i in range(3)]) check(od, basicsize + keysize + 8*p + 8 + 5*entrysize + 3*nodesize) od.update([(i, i) for i in range(3, 10)]) check(od, basicsize + keysize + 16*p + 16 + 10*entrysize + 10*nodesize) check(od.keys(), size('P')) check(od.items(), size('P')) check(od.values(), size('P')) itersize = size('iP2n2P') check(iter(od), itersize) check(iter(od.keys()), itersize) check(iter(od.items()), itersize) check(iter(od.values()), itersize) def test_key_change_during_iteration(self): OrderedDict = self.OrderedDict od = OrderedDict.fromkeys('abcde') self.assertEqual(list(od), list('abcde')) with self.assertRaises(RuntimeError): for i, k in enumerate(od): od.move_to_end(k) self.assertLess(i, 5) with self.assertRaises(RuntimeError): for k in od: od['f'] = None with self.assertRaises(RuntimeError): for k in od: del od['c'] self.assertEqual(list(od), list('bdeaf')) def test_iterators_pickling(self): OrderedDict = self.OrderedDict pairs = [('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)] od = OrderedDict(pairs) for method_name in ('keys', 'values', 'items'): meth = getattr(od, method_name) expected = list(meth())[1:] for i in range(pickle.HIGHEST_PROTOCOL + 1): with self.subTest(method_name=method_name, protocol=i): it = iter(meth()) next(it) p = pickle.dumps(it, i) unpickled = pickle.loads(p) self.assertEqual(list(unpickled), expected) self.assertEqual(list(it), expected) @support.cpython_only def test_weakref_list_is_not_traversed(self): # Check that the weakref list is not traversed when collecting # OrderedDict objects. See bpo-39778 for more information. gc.collect() x = self.OrderedDict() x.cycle = x cycle = [] cycle.append(cycle) x_ref = weakref.ref(x) cycle.append(x_ref) del x, cycle, x_ref gc.collect() class PurePythonOrderedDictSubclassTests(PurePythonOrderedDictTests): module = py_coll class OrderedDict(py_coll.OrderedDict): pass class CPythonOrderedDictSubclassTests(CPythonOrderedDictTests): module = c_coll class OrderedDict(c_coll.OrderedDict): pass class PurePythonGeneralMappingTests(mapping_tests.BasicTestMappingProtocol): @classmethod def setUpClass(cls): cls.type2test = py_coll.OrderedDict def test_popitem(self): d = self._empty_mapping() self.assertRaises(KeyError, d.popitem) @unittest.skipUnless(c_coll, 'requires the C version of the collections module') class CPythonGeneralMappingTests(mapping_tests.BasicTestMappingProtocol): @classmethod def setUpClass(cls): cls.type2test = c_coll.OrderedDict def test_popitem(self): d = self._empty_mapping() self.assertRaises(KeyError, d.popitem) class PurePythonSubclassMappingTests(mapping_tests.BasicTestMappingProtocol): @classmethod def setUpClass(cls): class MyOrderedDict(py_coll.OrderedDict): pass cls.type2test = MyOrderedDict def test_popitem(self): d = self._empty_mapping() self.assertRaises(KeyError, d.popitem) @unittest.skipUnless(c_coll, 'requires the C version of the collections module') class CPythonSubclassMappingTests(mapping_tests.BasicTestMappingProtocol): @classmethod def setUpClass(cls): class MyOrderedDict(c_coll.OrderedDict): pass cls.type2test = MyOrderedDict def test_popitem(self): d = self._empty_mapping() self.assertRaises(KeyError, d.popitem) if __name__ == "__main__": unittest.main()