import builtins
import contextlib
import copy
import gc
import operator
import pickle
import re
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_overridden_init(self):
# Sync-up pure Python OD class with C class where
# a consistent internal state is created in __new__
# rather than __init__.
OrderedDict = self.OrderedDict
class ODNI(OrderedDict):
def __init__(*args, **kwargs):
pass
od = ODNI()
od['a'] = 1 # This used to fail because __init__ was bypassed
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)
od.x = ['x']
od.z = ['z']
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())
dup = copy.copy(od)
check(dup)
self.assertIs(dup.x, od.x)
self.assertIs(dup.z, od.z)
self.assertFalse(hasattr(dup, 'y'))
dup = copy.deepcopy(od)
check(dup)
self.assertEqual(dup.x, od.x)
self.assertIsNot(dup.x, od.x)
self.assertEqual(dup.z, od.z)
self.assertIsNot(dup.z, od.z)
self.assertFalse(hasattr(dup, 'y'))
# 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):
dup = pickle.loads(pickle.dumps(od, proto))
check(dup)
self.assertEqual(dup.x, od.x)
self.assertEqual(dup.z, od.z)
self.assertFalse(hasattr(dup, 'y'))
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 _TriggerSideEffectOnEqual:
count = 0 # number of calls to __eq__
trigger = 1 # count value when to trigger side effect
def __eq__(self, other):
if self.__class__.count == self.__class__.trigger:
self.side_effect()
self.__class__.count += 1
return True
def __hash__(self):
# all instances represent the same key
return -1
def side_effect(self):
raise NotImplementedError
class PurePythonOrderedDictTests(OrderedDictTests, unittest.TestCase):
module = py_coll
OrderedDict = py_coll.OrderedDict
def test_issue119004_attribute_error(self):
class Key(_TriggerSideEffectOnEqual):
def side_effect(self):
del dict1[TODEL]
TODEL = Key()
dict1 = self.OrderedDict(dict.fromkeys((0, TODEL, 4.2)))
dict2 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
# This causes an AttributeError due to the linked list being changed
msg = re.escape("'NoneType' object has no attribute 'key'")
self.assertRaisesRegex(AttributeError, msg, operator.eq, dict1, dict2)
self.assertEqual(Key.count, 2)
self.assertDictEqual(dict1, dict.fromkeys((0, 4.2)))
self.assertDictEqual(dict2, dict.fromkeys((0, Key(), 4.2)))
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
class CPythonOrderedDictSideEffects:
def check_runtime_error_issue119004(self, dict1, dict2):
msg = re.escape("OrderedDict mutated during iteration")
self.assertRaisesRegex(RuntimeError, msg, operator.eq, dict1, dict2)
def test_issue119004_change_size_by_clear(self):
class Key(_TriggerSideEffectOnEqual):
def side_effect(self):
dict1.clear()
dict1 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
dict2 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
self.check_runtime_error_issue119004(dict1, dict2)
self.assertEqual(Key.count, 2)
self.assertDictEqual(dict1, {})
self.assertDictEqual(dict2, dict.fromkeys((0, Key(), 4.2)))
def test_issue119004_change_size_by_delete_key(self):
class Key(_TriggerSideEffectOnEqual):
def side_effect(self):
del dict1[TODEL]
TODEL = Key()
dict1 = self.OrderedDict(dict.fromkeys((0, TODEL, 4.2)))
dict2 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
self.check_runtime_error_issue119004(dict1, dict2)
self.assertEqual(Key.count, 2)
self.assertDictEqual(dict1, dict.fromkeys((0, 4.2)))
self.assertDictEqual(dict2, dict.fromkeys((0, Key(), 4.2)))
def test_issue119004_change_linked_list_by_clear(self):
class Key(_TriggerSideEffectOnEqual):
def side_effect(self):
dict1.clear()
dict1['a'] = dict1['b'] = 'c'
dict1 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
dict2 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
self.check_runtime_error_issue119004(dict1, dict2)
self.assertEqual(Key.count, 2)
self.assertDictEqual(dict1, dict.fromkeys(('a', 'b'), 'c'))
self.assertDictEqual(dict2, dict.fromkeys((0, Key(), 4.2)))
def test_issue119004_change_linked_list_by_delete_key(self):
class Key(_TriggerSideEffectOnEqual):
def side_effect(self):
del dict1[TODEL]
dict1['a'] = 'c'
TODEL = Key()
dict1 = self.OrderedDict(dict.fromkeys((0, TODEL, 4.2)))
dict2 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
self.check_runtime_error_issue119004(dict1, dict2)
self.assertEqual(Key.count, 2)
self.assertDictEqual(dict1, {0: None, 'a': 'c', 4.2: None})
self.assertDictEqual(dict2, dict.fromkeys((0, Key(), 4.2)))
def test_issue119004_change_size_by_delete_key_in_dict_eq(self):
class Key(_TriggerSideEffectOnEqual):
trigger = 0
def side_effect(self):
del dict1[TODEL]
TODEL = Key()
dict1 = self.OrderedDict(dict.fromkeys((0, TODEL, 4.2)))
dict2 = self.OrderedDict(dict.fromkeys((0, Key(), 4.2)))
self.assertEqual(Key.count, 0)
# the side effect is in dict.__eq__ and modifies the length
self.assertNotEqual(dict1, dict2)
self.assertEqual(Key.count, 2)
self.assertDictEqual(dict1, dict.fromkeys((0, 4.2)))
self.assertDictEqual(dict2, dict.fromkeys((0, Key(), 4.2)))
@unittest.skipUnless(c_coll, 'requires the C version of the collections module')
class CPythonOrderedDictTests(OrderedDictTests,
CPythonOrderedDictSideEffects,
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('n2BI2n')
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 PurePythonOrderedDictWithSlotsCopyingTests(unittest.TestCase):
module = py_coll
class OrderedDict(py_coll.OrderedDict):
__slots__ = ('x', 'y')
test_copying = OrderedDictTests.test_copying
@unittest.skipUnless(c_coll, 'requires the C version of the collections module')
class CPythonOrderedDictWithSlotsCopyingTests(unittest.TestCase):
module = c_coll
class OrderedDict(c_coll.OrderedDict):
__slots__ = ('x', 'y')
test_copying = OrderedDictTests.test_copying
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)
class SimpleLRUCache:
def __init__(self, size):
super().__init__()
self.size = size
self.counts = dict.fromkeys(('get', 'set', 'del'), 0)
def __getitem__(self, item):
self.counts['get'] += 1
value = super().__getitem__(item)
self.move_to_end(item)
return value
def __setitem__(self, key, value):
self.counts['set'] += 1
while key not in self and len(self) >= self.size:
self.popitem(last=False)
super().__setitem__(key, value)
self.move_to_end(key)
def __delitem__(self, key):
self.counts['del'] += 1
super().__delitem__(key)
class SimpleLRUCacheTests:
def test_add_after_full(self):
c = self.type2test(2)
c['t1'] = 1
c['t2'] = 2
c['t3'] = 3
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
self.assertEqual(list(c), ['t2', 't3'])
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
def test_popitem(self):
c = self.type2test(3)
for i in range(1, 4):
c[i] = i
self.assertEqual(c.popitem(last=False), (1, 1))
self.assertEqual(c.popitem(last=True), (3, 3))
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
def test_pop(self):
c = self.type2test(3)
for i in range(1, 4):
c[i] = i
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
self.assertEqual(c.pop(2), 2)
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
self.assertEqual(c.pop(4, 0), 0)
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
self.assertRaises(KeyError, c.pop, 4)
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
def test_change_order_on_get(self):
c = self.type2test(3)
for i in range(1, 4):
c[i] = i
self.assertEqual(list(c), list(range(1, 4)))
self.assertEqual(c.counts, {'get': 0, 'set': 3, 'del': 0})
self.assertEqual(c[2], 2)
self.assertEqual(c.counts, {'get': 1, 'set': 3, 'del': 0})
self.assertEqual(list(c), [1, 3, 2])
class PySimpleLRUCacheTests(SimpleLRUCacheTests, unittest.TestCase):
class type2test(SimpleLRUCache, py_coll.OrderedDict):
pass
@unittest.skipUnless(c_coll, 'requires the C version of the collections module')
class CSimpleLRUCacheTests(SimpleLRUCacheTests, unittest.TestCase):
@classmethod
def setUpClass(cls):
class type2test(SimpleLRUCache, c_coll.OrderedDict):
pass
cls.type2test = type2test
if __name__ == "__main__":
unittest.main()
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