Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 226af70a59df013eaa58b80e01f430f13fa998d3 authored by Georg Brandl on 18 March 2012, 06:34:49 UTC
Bump to 3.2.3rc2.
Bump to 3.2.3rc2.
Tip revision: 226af70
test_collections.py
"""Unit tests for collections.py."""
import unittest, doctest, operator
import inspect
from test import support
from collections import namedtuple, Counter, OrderedDict, _count_elements
from test import mapping_tests
import pickle, copy
from random import randrange, shuffle
import keyword
import re
import sys
from collections import _ChainMap
from collections import Hashable, Iterable, Iterator
from collections import Sized, Container, Callable
from collections import Set, MutableSet
from collections import Mapping, MutableMapping, KeysView, ItemsView, UserDict
from collections import Sequence, MutableSequence
from collections import ByteString
################################################################################
### _ChainMap (helper class for configparser)
################################################################################
ChainMap = _ChainMap # rename to keep test code in sync with 3.3 version
class TestChainMap(unittest.TestCase):
def test_basics(self):
c = ChainMap()
c['a'] = 1
c['b'] = 2
d = c.new_child()
d['b'] = 20
d['c'] = 30
self.assertEqual(d.maps, [{'b':20, 'c':30}, {'a':1, 'b':2}]) # check internal state
self.assertEqual(d.items(), dict(a=1, b=20, c=30).items()) # check items/iter/getitem
self.assertEqual(len(d), 3) # check len
for key in 'abc': # check contains
self.assertIn(key, d)
for k, v in dict(a=1, b=20, c=30, z=100).items(): # check get
self.assertEqual(d.get(k, 100), v)
del d['b'] # unmask a value
self.assertEqual(d.maps, [{'c':30}, {'a':1, 'b':2}]) # check internal state
self.assertEqual(d.items(), dict(a=1, b=2, c=30).items()) # check items/iter/getitem
self.assertEqual(len(d), 3) # check len
for key in 'abc': # check contains
self.assertIn(key, d)
for k, v in dict(a=1, b=2, c=30, z=100).items(): # check get
self.assertEqual(d.get(k, 100), v)
self.assertIn(repr(d), [ # check repr
type(d).__name__ + "({'c': 30}, {'a': 1, 'b': 2})",
type(d).__name__ + "({'c': 30}, {'b': 2, 'a': 1})"
])
for e in d.copy(), copy.copy(d): # check shallow copies
self.assertEqual(d, e)
self.assertEqual(d.maps, e.maps)
self.assertIsNot(d, e)
self.assertIsNot(d.maps[0], e.maps[0])
for m1, m2 in zip(d.maps[1:], e.maps[1:]):
self.assertIs(m1, m2)
for e in [pickle.loads(pickle.dumps(d)),
copy.deepcopy(d),
eval(repr(d))
]: # check deep copies
self.assertEqual(d, e)
self.assertEqual(d.maps, e.maps)
self.assertIsNot(d, e)
for m1, m2 in zip(d.maps, e.maps):
self.assertIsNot(m1, m2, e)
f = d.new_child()
f['b'] = 5
self.assertEqual(f.maps, [{'b': 5}, {'c':30}, {'a':1, 'b':2}])
self.assertEqual(f.parents.maps, [{'c':30}, {'a':1, 'b':2}]) # check parents
self.assertEqual(f['b'], 5) # find first in chain
self.assertEqual(f.parents['b'], 2) # look beyond maps[0]
def test_contructor(self):
self.assertEqual(ChainMap().maps, [{}]) # no-args --> one new dict
self.assertEqual(ChainMap({1:2}).maps, [{1:2}]) # 1 arg --> list
def test_bool(self):
self.assertFalse(ChainMap())
self.assertFalse(ChainMap({}, {}))
self.assertTrue(ChainMap({1:2}, {}))
self.assertTrue(ChainMap({}, {1:2}))
def test_missing(self):
class DefaultChainMap(ChainMap):
def __missing__(self, key):
return 999
d = DefaultChainMap(dict(a=1, b=2), dict(b=20, c=30))
for k, v in dict(a=1, b=2, c=30, d=999).items():
self.assertEqual(d[k], v) # check __getitem__ w/missing
for k, v in dict(a=1, b=2, c=30, d=77).items():
self.assertEqual(d.get(k, 77), v) # check get() w/ missing
for k, v in dict(a=True, b=True, c=True, d=False).items():
self.assertEqual(k in d, v) # check __contains__ w/missing
self.assertEqual(d.pop('a', 1001), 1, d)
self.assertEqual(d.pop('a', 1002), 1002) # check pop() w/missing
self.assertEqual(d.popitem(), ('b', 2)) # check popitem() w/missing
with self.assertRaises(KeyError):
d.popitem()
def test_dict_coercion(self):
d = ChainMap(dict(a=1, b=2), dict(b=20, c=30))
self.assertEqual(dict(d), dict(a=1, b=2, c=30))
self.assertEqual(dict(d.items()), dict(a=1, b=2, c=30))
################################################################################
### Named Tuples
################################################################################
TestNT = namedtuple('TestNT', 'x y z') # type used for pickle tests
class TestNamedTuple(unittest.TestCase):
def test_factory(self):
Point = namedtuple('Point', 'x y')
self.assertEqual(Point.__name__, 'Point')
self.assertEqual(Point.__slots__, ())
self.assertEqual(Point.__module__, __name__)
self.assertEqual(Point.__getitem__, tuple.__getitem__)
self.assertEqual(Point._fields, ('x', 'y'))
self.assertRaises(ValueError, namedtuple, 'abc%', 'efg ghi') # type has non-alpha char
self.assertRaises(ValueError, namedtuple, 'class', 'efg ghi') # type has keyword
self.assertRaises(ValueError, namedtuple, '9abc', 'efg ghi') # type starts with digit
self.assertRaises(ValueError, namedtuple, 'abc', 'efg g%hi') # field with non-alpha char
self.assertRaises(ValueError, namedtuple, 'abc', 'abc class') # field has keyword
self.assertRaises(ValueError, namedtuple, 'abc', '8efg 9ghi') # field starts with digit
self.assertRaises(ValueError, namedtuple, 'abc', '_efg ghi') # field with leading underscore
self.assertRaises(ValueError, namedtuple, 'abc', 'efg efg ghi') # duplicate field
namedtuple('Point0', 'x1 y2') # Verify that numbers are allowed in names
namedtuple('_', 'a b c') # Test leading underscores in a typename
nt = namedtuple('nt', 'the quick brown fox') # check unicode input
self.assertNotIn("u'", repr(nt._fields))
nt = namedtuple('nt', ('the', 'quick')) # check unicode input
self.assertNotIn("u'", repr(nt._fields))
self.assertRaises(TypeError, Point._make, [11]) # catch too few args
self.assertRaises(TypeError, Point._make, [11, 22, 33]) # catch too many args
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_factory_doc_attr(self):
Point = namedtuple('Point', 'x y')
self.assertEqual(Point.__doc__, 'Point(x, y)')
def test_name_fixer(self):
for spec, renamed in [
[('efg', 'g%hi'), ('efg', '_1')], # field with non-alpha char
[('abc', 'class'), ('abc', '_1')], # field has keyword
[('8efg', '9ghi'), ('_0', '_1')], # field starts with digit
[('abc', '_efg'), ('abc', '_1')], # field with leading underscore
[('abc', 'efg', 'efg', 'ghi'), ('abc', 'efg', '_2', 'ghi')], # duplicate field
[('abc', '', 'x'), ('abc', '_1', 'x')], # fieldname is a space
]:
self.assertEqual(namedtuple('NT', spec, rename=True)._fields, renamed)
def test_instance(self):
Point = namedtuple('Point', 'x y')
p = Point(11, 22)
self.assertEqual(p, Point(x=11, y=22))
self.assertEqual(p, Point(11, y=22))
self.assertEqual(p, Point(y=22, x=11))
self.assertEqual(p, Point(*(11, 22)))
self.assertEqual(p, Point(**dict(x=11, y=22)))
self.assertRaises(TypeError, Point, 1) # too few args
self.assertRaises(TypeError, Point, 1, 2, 3) # too many args
self.assertRaises(TypeError, eval, 'Point(XXX=1, y=2)', locals()) # wrong keyword argument
self.assertRaises(TypeError, eval, 'Point(x=1)', locals()) # missing keyword argument
self.assertEqual(repr(p), 'Point(x=11, y=22)')
self.assertNotIn('__weakref__', dir(p))
self.assertEqual(p, Point._make([11, 22])) # test _make classmethod
self.assertEqual(p._fields, ('x', 'y')) # test _fields attribute
self.assertEqual(p._replace(x=1), (1, 22)) # test _replace method
self.assertEqual(p._asdict(), dict(x=11, y=22)) # test _asdict method
self.assertEqual(vars(p), p._asdict()) # verify that vars() works
try:
p._replace(x=1, error=2)
except ValueError:
pass
else:
self._fail('Did not detect an incorrect fieldname')
# verify that field string can have commas
Point = namedtuple('Point', 'x, y')
p = Point(x=11, y=22)
self.assertEqual(repr(p), 'Point(x=11, y=22)')
# verify that fieldspec can be a non-string sequence
Point = namedtuple('Point', ('x', 'y'))
p = Point(x=11, y=22)
self.assertEqual(repr(p), 'Point(x=11, y=22)')
def test_tupleness(self):
Point = namedtuple('Point', 'x y')
p = Point(11, 22)
self.assertIsInstance(p, tuple)
self.assertEqual(p, (11, 22)) # matches a real tuple
self.assertEqual(tuple(p), (11, 22)) # coercable to a real tuple
self.assertEqual(list(p), [11, 22]) # coercable to a list
self.assertEqual(max(p), 22) # iterable
self.assertEqual(max(*p), 22) # star-able
x, y = p
self.assertEqual(p, (x, y)) # unpacks like a tuple
self.assertEqual((p[0], p[1]), (11, 22)) # indexable like a tuple
self.assertRaises(IndexError, p.__getitem__, 3)
self.assertEqual(p.x, x)
self.assertEqual(p.y, y)
self.assertRaises(AttributeError, eval, 'p.z', locals())
def test_odd_sizes(self):
Zero = namedtuple('Zero', '')
self.assertEqual(Zero(), ())
self.assertEqual(Zero._make([]), ())
self.assertEqual(repr(Zero()), 'Zero()')
self.assertEqual(Zero()._asdict(), {})
self.assertEqual(Zero()._fields, ())
Dot = namedtuple('Dot', 'd')
self.assertEqual(Dot(1), (1,))
self.assertEqual(Dot._make([1]), (1,))
self.assertEqual(Dot(1).d, 1)
self.assertEqual(repr(Dot(1)), 'Dot(d=1)')
self.assertEqual(Dot(1)._asdict(), {'d':1})
self.assertEqual(Dot(1)._replace(d=999), (999,))
self.assertEqual(Dot(1)._fields, ('d',))
# n = 5000
n = 254 # SyntaxError: more than 255 arguments:
import string, random
names = list(set(''.join([random.choice(string.ascii_letters)
for j in range(10)]) for i in range(n)))
n = len(names)
Big = namedtuple('Big', names)
b = Big(*range(n))
self.assertEqual(b, tuple(range(n)))
self.assertEqual(Big._make(range(n)), tuple(range(n)))
for pos, name in enumerate(names):
self.assertEqual(getattr(b, name), pos)
repr(b) # make sure repr() doesn't blow-up
d = b._asdict()
d_expected = dict(zip(names, range(n)))
self.assertEqual(d, d_expected)
b2 = b._replace(**dict([(names[1], 999),(names[-5], 42)]))
b2_expected = list(range(n))
b2_expected[1] = 999
b2_expected[-5] = 42
self.assertEqual(b2, tuple(b2_expected))
self.assertEqual(b._fields, tuple(names))
def test_pickle(self):
p = TestNT(x=10, y=20, z=30)
for module in (pickle,):
loads = getattr(module, 'loads')
dumps = getattr(module, 'dumps')
for protocol in -1, 0, 1, 2:
q = loads(dumps(p, protocol))
self.assertEqual(p, q)
self.assertEqual(p._fields, q._fields)
def test_copy(self):
p = TestNT(x=10, y=20, z=30)
for copier in copy.copy, copy.deepcopy:
q = copier(p)
self.assertEqual(p, q)
self.assertEqual(p._fields, q._fields)
def test_name_conflicts(self):
# Some names like "self", "cls", "tuple", "itemgetter", and "property"
# failed when used as field names. Test to make sure these now work.
T = namedtuple('T', 'itemgetter property self cls tuple')
t = T(1, 2, 3, 4, 5)
self.assertEqual(t, (1,2,3,4,5))
newt = t._replace(itemgetter=10, property=20, self=30, cls=40, tuple=50)
self.assertEqual(newt, (10,20,30,40,50))
# Broader test of all interesting names in a template
with support.captured_stdout() as template:
T = namedtuple('T', 'x', verbose=True)
words = set(re.findall('[A-Za-z]+', template.getvalue()))
words -= set(keyword.kwlist)
T = namedtuple('T', words)
# test __new__
values = tuple(range(len(words)))
t = T(*values)
self.assertEqual(t, values)
t = T(**dict(zip(T._fields, values)))
self.assertEqual(t, values)
# test _make
t = T._make(values)
self.assertEqual(t, values)
# exercise __repr__
repr(t)
# test _asdict
self.assertEqual(t._asdict(), dict(zip(T._fields, values)))
# test _replace
t = T._make(values)
newvalues = tuple(v*10 for v in values)
newt = t._replace(**dict(zip(T._fields, newvalues)))
self.assertEqual(newt, newvalues)
# test _fields
self.assertEqual(T._fields, tuple(words))
# test __getnewargs__
self.assertEqual(t.__getnewargs__(), values)
def test_repr(self):
with support.captured_stdout() as template:
A = namedtuple('A', 'x', verbose=True)
self.assertEqual(repr(A(1)), 'A(x=1)')
# repr should show the name of the subclass
class B(A):
pass
self.assertEqual(repr(B(1)), 'B(x=1)')
################################################################################
### Abstract Base Classes
################################################################################
class ABCTestCase(unittest.TestCase):
def validate_abstract_methods(self, abc, *names):
methodstubs = dict.fromkeys(names, lambda s, *args: 0)
# everything should work will all required methods are present
C = type('C', (abc,), methodstubs)
C()
# instantiation should fail if a required method is missing
for name in names:
stubs = methodstubs.copy()
del stubs[name]
C = type('C', (abc,), stubs)
self.assertRaises(TypeError, C, name)
def validate_isinstance(self, abc, name):
stub = lambda s, *args: 0
C = type('C', (object,), {'__hash__': None})
setattr(C, name, stub)
self.assertIsInstance(C(), abc)
self.assertTrue(issubclass(C, abc))
C = type('C', (object,), {'__hash__': None})
self.assertNotIsInstance(C(), abc)
self.assertFalse(issubclass(C, abc))
def validate_comparison(self, instance):
ops = ['lt', 'gt', 'le', 'ge', 'ne', 'or', 'and', 'xor', 'sub']
operators = {}
for op in ops:
name = '__' + op + '__'
operators[name] = getattr(operator, name)
class Other:
def __init__(self):
self.right_side = False
def __eq__(self, other):
self.right_side = True
return True
__lt__ = __eq__
__gt__ = __eq__
__le__ = __eq__
__ge__ = __eq__
__ne__ = __eq__
__ror__ = __eq__
__rand__ = __eq__
__rxor__ = __eq__
__rsub__ = __eq__
for name, op in operators.items():
if not hasattr(instance, name):
continue
other = Other()
op(instance, other)
self.assertTrue(other.right_side,'Right side not called for %s.%s'
% (type(instance), name))
class TestOneTrickPonyABCs(ABCTestCase):
def test_Hashable(self):
# Check some non-hashables
non_samples = [bytearray(), list(), set(), dict()]
for x in non_samples:
self.assertNotIsInstance(x, Hashable)
self.assertFalse(issubclass(type(x), Hashable), repr(type(x)))
# Check some hashables
samples = [None,
int(), float(), complex(),
str(),
tuple(), frozenset(),
int, list, object, type, bytes()
]
for x in samples:
self.assertIsInstance(x, Hashable)
self.assertTrue(issubclass(type(x), Hashable), repr(type(x)))
self.assertRaises(TypeError, Hashable)
# Check direct subclassing
class H(Hashable):
def __hash__(self):
return super().__hash__()
self.assertEqual(hash(H()), 0)
self.assertFalse(issubclass(int, H))
self.validate_abstract_methods(Hashable, '__hash__')
self.validate_isinstance(Hashable, '__hash__')
def test_Iterable(self):
# Check some non-iterables
non_samples = [None, 42, 3.14, 1j]
for x in non_samples:
self.assertNotIsInstance(x, Iterable)
self.assertFalse(issubclass(type(x), Iterable), repr(type(x)))
# Check some iterables
samples = [bytes(), str(),
tuple(), list(), set(), frozenset(), dict(),
dict().keys(), dict().items(), dict().values(),
(lambda: (yield))(),
(x for x in []),
]
for x in samples:
self.assertIsInstance(x, Iterable)
self.assertTrue(issubclass(type(x), Iterable), repr(type(x)))
# Check direct subclassing
class I(Iterable):
def __iter__(self):
return super().__iter__()
self.assertEqual(list(I()), [])
self.assertFalse(issubclass(str, I))
self.validate_abstract_methods(Iterable, '__iter__')
self.validate_isinstance(Iterable, '__iter__')
def test_Iterator(self):
non_samples = [None, 42, 3.14, 1j, b"", "", (), [], {}, set()]
for x in non_samples:
self.assertNotIsInstance(x, Iterator)
self.assertFalse(issubclass(type(x), Iterator), repr(type(x)))
samples = [iter(bytes()), iter(str()),
iter(tuple()), iter(list()), iter(dict()),
iter(set()), iter(frozenset()),
iter(dict().keys()), iter(dict().items()),
iter(dict().values()),
(lambda: (yield))(),
(x for x in []),
]
for x in samples:
self.assertIsInstance(x, Iterator)
self.assertTrue(issubclass(type(x), Iterator), repr(type(x)))
self.validate_abstract_methods(Iterator, '__next__', '__iter__')
# Issue 10565
class NextOnly:
def __next__(self):
yield 1
raise StopIteration
self.assertNotIsInstance(NextOnly(), Iterator)
def test_Sized(self):
non_samples = [None, 42, 3.14, 1j,
(lambda: (yield))(),
(x for x in []),
]
for x in non_samples:
self.assertNotIsInstance(x, Sized)
self.assertFalse(issubclass(type(x), Sized), repr(type(x)))
samples = [bytes(), str(),
tuple(), list(), set(), frozenset(), dict(),
dict().keys(), dict().items(), dict().values(),
]
for x in samples:
self.assertIsInstance(x, Sized)
self.assertTrue(issubclass(type(x), Sized), repr(type(x)))
self.validate_abstract_methods(Sized, '__len__')
self.validate_isinstance(Sized, '__len__')
def test_Container(self):
non_samples = [None, 42, 3.14, 1j,
(lambda: (yield))(),
(x for x in []),
]
for x in non_samples:
self.assertNotIsInstance(x, Container)
self.assertFalse(issubclass(type(x), Container), repr(type(x)))
samples = [bytes(), str(),
tuple(), list(), set(), frozenset(), dict(),
dict().keys(), dict().items(),
]
for x in samples:
self.assertIsInstance(x, Container)
self.assertTrue(issubclass(type(x), Container), repr(type(x)))
self.validate_abstract_methods(Container, '__contains__')
self.validate_isinstance(Container, '__contains__')
def test_Callable(self):
non_samples = [None, 42, 3.14, 1j,
"", b"", (), [], {}, set(),
(lambda: (yield))(),
(x for x in []),
]
for x in non_samples:
self.assertNotIsInstance(x, Callable)
self.assertFalse(issubclass(type(x), Callable), repr(type(x)))
samples = [lambda: None,
type, int, object,
len,
list.append, [].append,
]
for x in samples:
self.assertIsInstance(x, Callable)
self.assertTrue(issubclass(type(x), Callable), repr(type(x)))
self.validate_abstract_methods(Callable, '__call__')
self.validate_isinstance(Callable, '__call__')
def test_direct_subclassing(self):
for B in Hashable, Iterable, Iterator, Sized, Container, Callable:
class C(B):
pass
self.assertTrue(issubclass(C, B))
self.assertFalse(issubclass(int, C))
def test_registration(self):
for B in Hashable, Iterable, Iterator, Sized, Container, Callable:
class C:
__hash__ = None # Make sure it isn't hashable by default
self.assertFalse(issubclass(C, B), B.__name__)
B.register(C)
self.assertTrue(issubclass(C, B))
class WithSet(MutableSet):
def __init__(self, it=()):
self.data = set(it)
def __len__(self):
return len(self.data)
def __iter__(self):
return iter(self.data)
def __contains__(self, item):
return item in self.data
def add(self, item):
self.data.add(item)
def discard(self, item):
self.data.discard(item)
class TestCollectionABCs(ABCTestCase):
# XXX For now, we only test some virtual inheritance properties.
# We should also test the proper behavior of the collection ABCs
# as real base classes or mix-in classes.
def test_Set(self):
for sample in [set, frozenset]:
self.assertIsInstance(sample(), Set)
self.assertTrue(issubclass(sample, Set))
self.validate_abstract_methods(Set, '__contains__', '__iter__', '__len__')
class MySet(Set):
def __contains__(self, x):
return False
def __len__(self):
return 0
def __iter__(self):
return iter([])
self.validate_comparison(MySet())
def test_hash_Set(self):
class OneTwoThreeSet(Set):
def __init__(self):
self.contents = [1, 2, 3]
def __contains__(self, x):
return x in self.contents
def __len__(self):
return len(self.contents)
def __iter__(self):
return iter(self.contents)
def __hash__(self):
return self._hash()
a, b = OneTwoThreeSet(), OneTwoThreeSet()
self.assertTrue(hash(a) == hash(b))
def test_MutableSet(self):
self.assertIsInstance(set(), MutableSet)
self.assertTrue(issubclass(set, MutableSet))
self.assertNotIsInstance(frozenset(), MutableSet)
self.assertFalse(issubclass(frozenset, MutableSet))
self.validate_abstract_methods(MutableSet, '__contains__', '__iter__', '__len__',
'add', 'discard')
def test_issue_5647(self):
# MutableSet.__iand__ mutated the set during iteration
s = WithSet('abcd')
s &= WithSet('cdef') # This used to fail
self.assertEqual(set(s), set('cd'))
def test_issue_4920(self):
# MutableSet.pop() method did not work
class MySet(MutableSet):
__slots__=['__s']
def __init__(self,items=None):
if items is None:
items=[]
self.__s=set(items)
def __contains__(self,v):
return v in self.__s
def __iter__(self):
return iter(self.__s)
def __len__(self):
return len(self.__s)
def add(self,v):
result=v not in self.__s
self.__s.add(v)
return result
def discard(self,v):
result=v in self.__s
self.__s.discard(v)
return result
def __repr__(self):
return "MySet(%s)" % repr(list(self))
s = MySet([5,43,2,1])
self.assertEqual(s.pop(), 1)
def test_issue8750(self):
empty = WithSet()
full = WithSet(range(10))
s = WithSet(full)
s -= s
self.assertEqual(s, empty)
s = WithSet(full)
s ^= s
self.assertEqual(s, empty)
s = WithSet(full)
s &= s
self.assertEqual(s, full)
s |= s
self.assertEqual(s, full)
def test_Mapping(self):
for sample in [dict]:
self.assertIsInstance(sample(), Mapping)
self.assertTrue(issubclass(sample, Mapping))
self.validate_abstract_methods(Mapping, '__contains__', '__iter__', '__len__',
'__getitem__')
class MyMapping(Mapping):
def __len__(self):
return 0
def __getitem__(self, i):
raise IndexError
def __iter__(self):
return iter(())
self.validate_comparison(MyMapping())
def test_MutableMapping(self):
for sample in [dict]:
self.assertIsInstance(sample(), MutableMapping)
self.assertTrue(issubclass(sample, MutableMapping))
self.validate_abstract_methods(MutableMapping, '__contains__', '__iter__', '__len__',
'__getitem__', '__setitem__', '__delitem__')
def test_MutableMapping_subclass(self):
# Test issue 9214
mymap = UserDict()
mymap['red'] = 5
self.assertIsInstance(mymap.keys(), Set)
self.assertIsInstance(mymap.keys(), KeysView)
self.assertIsInstance(mymap.items(), Set)
self.assertIsInstance(mymap.items(), ItemsView)
mymap = UserDict()
mymap['red'] = 5
z = mymap.keys() | {'orange'}
self.assertIsInstance(z, set)
list(z)
mymap['blue'] = 7 # Shouldn't affect 'z'
self.assertEqual(sorted(z), ['orange', 'red'])
mymap = UserDict()
mymap['red'] = 5
z = mymap.items() | {('orange', 3)}
self.assertIsInstance(z, set)
list(z)
mymap['blue'] = 7 # Shouldn't affect 'z'
self.assertEqual(sorted(z), [('orange', 3), ('red', 5)])
def test_Sequence(self):
for sample in [tuple, list, bytes, str]:
self.assertIsInstance(sample(), Sequence)
self.assertTrue(issubclass(sample, Sequence))
self.assertIsInstance(range(10), Sequence)
self.assertTrue(issubclass(range, Sequence))
self.assertTrue(issubclass(str, Sequence))
self.validate_abstract_methods(Sequence, '__contains__', '__iter__', '__len__',
'__getitem__')
def test_ByteString(self):
for sample in [bytes, bytearray]:
self.assertIsInstance(sample(), ByteString)
self.assertTrue(issubclass(sample, ByteString))
for sample in [str, list, tuple]:
self.assertNotIsInstance(sample(), ByteString)
self.assertFalse(issubclass(sample, ByteString))
self.assertNotIsInstance(memoryview(b""), ByteString)
self.assertFalse(issubclass(memoryview, ByteString))
def test_MutableSequence(self):
for sample in [tuple, str, bytes]:
self.assertNotIsInstance(sample(), MutableSequence)
self.assertFalse(issubclass(sample, MutableSequence))
for sample in [list, bytearray]:
self.assertIsInstance(sample(), MutableSequence)
self.assertTrue(issubclass(sample, MutableSequence))
self.assertFalse(issubclass(str, MutableSequence))
self.validate_abstract_methods(MutableSequence, '__contains__', '__iter__',
'__len__', '__getitem__', '__setitem__', '__delitem__', 'insert')
################################################################################
### Counter
################################################################################
class TestCounter(unittest.TestCase):
def test_basics(self):
c = Counter('abcaba')
self.assertEqual(c, Counter({'a':3 , 'b': 2, 'c': 1}))
self.assertEqual(c, Counter(a=3, b=2, c=1))
self.assertIsInstance(c, dict)
self.assertIsInstance(c, Mapping)
self.assertTrue(issubclass(Counter, dict))
self.assertTrue(issubclass(Counter, Mapping))
self.assertEqual(len(c), 3)
self.assertEqual(sum(c.values()), 6)
self.assertEqual(sorted(c.values()), [1, 2, 3])
self.assertEqual(sorted(c.keys()), ['a', 'b', 'c'])
self.assertEqual(sorted(c), ['a', 'b', 'c'])
self.assertEqual(sorted(c.items()),
[('a', 3), ('b', 2), ('c', 1)])
self.assertEqual(c['b'], 2)
self.assertEqual(c['z'], 0)
self.assertEqual(c.__contains__('c'), True)
self.assertEqual(c.__contains__('z'), False)
self.assertEqual(c.get('b', 10), 2)
self.assertEqual(c.get('z', 10), 10)
self.assertEqual(c, dict(a=3, b=2, c=1))
self.assertEqual(repr(c), "Counter({'a': 3, 'b': 2, 'c': 1})")
self.assertEqual(c.most_common(), [('a', 3), ('b', 2), ('c', 1)])
for i in range(5):
self.assertEqual(c.most_common(i),
[('a', 3), ('b', 2), ('c', 1)][:i])
self.assertEqual(''.join(sorted(c.elements())), 'aaabbc')
c['a'] += 1 # increment an existing value
c['b'] -= 2 # sub existing value to zero
del c['c'] # remove an entry
del c['c'] # make sure that del doesn't raise KeyError
c['d'] -= 2 # sub from a missing value
c['e'] = -5 # directly assign a missing value
c['f'] += 4 # add to a missing value
self.assertEqual(c, dict(a=4, b=0, d=-2, e=-5, f=4))
self.assertEqual(''.join(sorted(c.elements())), 'aaaaffff')
self.assertEqual(c.pop('f'), 4)
self.assertNotIn('f', c)
for i in range(3):
elem, cnt = c.popitem()
self.assertNotIn(elem, c)
c.clear()
self.assertEqual(c, {})
self.assertEqual(repr(c), 'Counter()')
self.assertRaises(NotImplementedError, Counter.fromkeys, 'abc')
self.assertRaises(TypeError, hash, c)
c.update(dict(a=5, b=3))
c.update(c=1)
c.update(Counter('a' * 50 + 'b' * 30))
c.update() # test case with no args
c.__init__('a' * 500 + 'b' * 300)
c.__init__('cdc')
c.__init__()
self.assertEqual(c, dict(a=555, b=333, c=3, d=1))
self.assertEqual(c.setdefault('d', 5), 1)
self.assertEqual(c['d'], 1)
self.assertEqual(c.setdefault('e', 5), 5)
self.assertEqual(c['e'], 5)
def test_copying(self):
# Check that counters are copyable, deepcopyable, picklable, and
#have a repr/eval round-trip
words = Counter('which witch had which witches wrist watch'.split())
update_test = Counter()
update_test.update(words)
for i, dup in enumerate([
words.copy(),
copy.copy(words),
copy.deepcopy(words),
pickle.loads(pickle.dumps(words, 0)),
pickle.loads(pickle.dumps(words, 1)),
pickle.loads(pickle.dumps(words, 2)),
pickle.loads(pickle.dumps(words, -1)),
eval(repr(words)),
update_test,
Counter(words),
]):
msg = (i, dup, words)
self.assertTrue(dup is not words)
self.assertEqual(dup, words)
self.assertEqual(len(dup), len(words))
self.assertEqual(type(dup), type(words))
def test_copy_subclass(self):
class MyCounter(Counter):
pass
c = MyCounter('slartibartfast')
d = c.copy()
self.assertEqual(d, c)
self.assertEqual(len(d), len(c))
self.assertEqual(type(d), type(c))
def test_conversions(self):
# Convert to: set, list, dict
s = 'she sells sea shells by the sea shore'
self.assertEqual(sorted(Counter(s).elements()), sorted(s))
self.assertEqual(sorted(Counter(s)), sorted(set(s)))
self.assertEqual(dict(Counter(s)), dict(Counter(s).items()))
self.assertEqual(set(Counter(s)), set(s))
def test_invariant_for_the_in_operator(self):
c = Counter(a=10, b=-2, c=0)
for elem in c:
self.assertTrue(elem in c)
self.assertIn(elem, c)
def test_multiset_operations(self):
# Verify that adding a zero counter will strip zeros and negatives
c = Counter(a=10, b=-2, c=0) + Counter()
self.assertEqual(dict(c), dict(a=10))
elements = 'abcd'
for i in range(1000):
# test random pairs of multisets
p = Counter(dict((elem, randrange(-2,4)) for elem in elements))
p.update(e=1, f=-1, g=0)
q = Counter(dict((elem, randrange(-2,4)) for elem in elements))
q.update(h=1, i=-1, j=0)
for counterop, numberop in [
(Counter.__add__, lambda x, y: max(0, x+y)),
(Counter.__sub__, lambda x, y: max(0, x-y)),
(Counter.__or__, lambda x, y: max(0,x,y)),
(Counter.__and__, lambda x, y: max(0, min(x,y))),
]:
result = counterop(p, q)
for x in elements:
self.assertEqual(numberop(p[x], q[x]), result[x],
(counterop, x, p, q))
# verify that results exclude non-positive counts
self.assertTrue(x>0 for x in result.values())
elements = 'abcdef'
for i in range(100):
# verify that random multisets with no repeats are exactly like sets
p = Counter(dict((elem, randrange(0, 2)) for elem in elements))
q = Counter(dict((elem, randrange(0, 2)) for elem in elements))
for counterop, setop in [
(Counter.__sub__, set.__sub__),
(Counter.__or__, set.__or__),
(Counter.__and__, set.__and__),
]:
counter_result = counterop(p, q)
set_result = setop(set(p.elements()), set(q.elements()))
self.assertEqual(counter_result, dict.fromkeys(set_result, 1))
def test_subtract(self):
c = Counter(a=-5, b=0, c=5, d=10, e=15,g=40)
c.subtract(a=1, b=2, c=-3, d=10, e=20, f=30, h=-50)
self.assertEqual(c, Counter(a=-6, b=-2, c=8, d=0, e=-5, f=-30, g=40, h=50))
c = Counter(a=-5, b=0, c=5, d=10, e=15,g=40)
c.subtract(Counter(a=1, b=2, c=-3, d=10, e=20, f=30, h=-50))
self.assertEqual(c, Counter(a=-6, b=-2, c=8, d=0, e=-5, f=-30, g=40, h=50))
c = Counter('aaabbcd')
c.subtract('aaaabbcce')
self.assertEqual(c, Counter(a=-1, b=0, c=-1, d=1, e=-1))
def test_repr_nonsortable(self):
c = Counter(a=2, b=None)
r = repr(c)
self.assertIn("'a': 2", r)
self.assertIn("'b': None", r)
def test_helper_function(self):
# two paths, one for real dicts and one for other mappings
elems = list('abracadabra')
d = dict()
_count_elements(d, elems)
self.assertEqual(d, {'a': 5, 'r': 2, 'b': 2, 'c': 1, 'd': 1})
m = OrderedDict()
_count_elements(m, elems)
self.assertEqual(m,
OrderedDict([('a', 5), ('b', 2), ('r', 2), ('c', 1), ('d', 1)]))
################################################################################
### OrderedDict
################################################################################
class TestOrderedDict(unittest.TestCase):
def test_init(self):
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(inspect.getargspec(OrderedDict.__dict__['__init__']).args,
['self'])
# 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_update(self):
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)])
def test_abc(self):
self.assertIsInstance(OrderedDict(), MutableMapping)
self.assertTrue(issubclass(OrderedDict, MutableMapping))
def test_clear(self):
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):
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):
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):
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)])
def test_popitem(self):
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_pop(self):
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)
with self.assertRaises(KeyError):
m.pop('a')
def test_equality(self):
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):
# 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)
update_test = OrderedDict()
update_test.update(od)
for i, dup in enumerate([
od.copy(),
copy.copy(od),
copy.deepcopy(od),
pickle.loads(pickle.dumps(od, 0)),
pickle.loads(pickle.dumps(od, 1)),
pickle.loads(pickle.dumps(od, 2)),
pickle.loads(pickle.dumps(od, 3)),
pickle.loads(pickle.dumps(od, -1)),
eval(repr(od)),
update_test,
OrderedDict(od),
]):
self.assertTrue(dup is not od)
self.assertEqual(dup, od)
self.assertEqual(list(dup.items()), list(od.items()))
self.assertEqual(len(dup), len(od))
self.assertEqual(type(dup), type(od))
def test_yaml_linkage(self):
# 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):
# 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.assertEqual(len(od.__reduce__()), 2)
od.x = 10
self.assertEqual(len(od.__reduce__()), 3)
def test_repr(self):
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):
# See issue #9826
od = OrderedDict.fromkeys('abc')
od['x'] = od
self.assertEqual(repr(od),
"OrderedDict([('a', None), ('b', None), ('c', None), ('x', ...)])")
def test_setdefault(self):
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))
# 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):
# 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']
od['a'] = 1
self.assertEqual(list(od.items()), [('b', 2), ('a', 1)])
def test_move_to_end(self):
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', 0)
self.assertEqual(list(od), list('cabde'))
od.move_to_end('c', 0)
self.assertEqual(list(od), list('cabde'))
od.move_to_end('e')
self.assertEqual(list(od), list('cabde'))
with self.assertRaises(KeyError):
od.move_to_end('x')
def test_sizeof(self):
# 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_override_update(self):
# 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)
class GeneralMappingTests(mapping_tests.BasicTestMappingProtocol):
type2test = OrderedDict
def test_popitem(self):
d = self._empty_mapping()
self.assertRaises(KeyError, d.popitem)
class MyOrderedDict(OrderedDict):
pass
class SubclassMappingTests(mapping_tests.BasicTestMappingProtocol):
type2test = MyOrderedDict
def test_popitem(self):
d = self._empty_mapping()
self.assertRaises(KeyError, d.popitem)
################################################################################
### Run tests
################################################################################
import doctest, collections
def test_main(verbose=None):
NamedTupleDocs = doctest.DocTestSuite(module=collections)
test_classes = [TestNamedTuple, NamedTupleDocs, TestOneTrickPonyABCs,
TestCollectionABCs, TestCounter, TestChainMap,
TestOrderedDict, GeneralMappingTests, SubclassMappingTests]
support.run_unittest(*test_classes)
support.run_doctest(collections, verbose)
if __name__ == "__main__":
test_main(verbose=True)
