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✏️ test_collections.py
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import collections import copy import doctest import keyword import operator import pickle import cPickle from random import choice, randrange import re import string import sys from test import test_support import unittest from collections import namedtuple, Counter, OrderedDict from collections import Hashable, Iterable, Iterator from collections import Sized, Container, Callable from collections import Set, MutableSet from collections import Mapping, MutableMapping from collections import Sequence, MutableSequence # Silence deprecation warning sets = test_support.import_module('sets', deprecated=True) TestNT = namedtuple('TestNT', 'x y z') # type used for pickle tests py273_named_tuple_pickle = '''\ ccopy_reg _reconstructor p0 (ctest.test_collections TestNT p1 c__builtin__ tuple p2 (I10 I20 I30 tp3 tp4 Rp5 ccollections OrderedDict p6 ((lp7 (lp8 S'x' p9 aI10 aa(lp10 S'y' p11 aI20 aa(lp12 S'z' p13 aI30 aatp14 Rp15 b. ''' 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', u'the quick brown fox') # check unicode input self.assertNotIn("u'", repr(nt._fields)) nt = namedtuple('nt', (u'the', u'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 names = list(set(''.join([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 = 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, cPickle: 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 test_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_pickling_bug_18015(self): # http://bugs.python.org/issue18015 pt = pickle.loads(py273_named_tuple_pickle) self.assertEqual(pt.x, 10) 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 # new-style class C = type('C', (object,), {name: stub}) self.assertIsInstance(C(), abc) self.assertTrue(issubclass(C, abc)) # old-style class class C: pass setattr(C, name, stub) self.assertIsInstance(C(), abc) self.assertTrue(issubclass(C, abc)) # new-style class C = type('C', (object,), {'__hash__': None}) self.assertNotIsInstance(C(), abc) self.assertFalse(issubclass(C, abc)) # old-style class class C: pass 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 = [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, ] 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(H, self).__hash__() __eq__ = Hashable.__eq__ # Silence Py3k warning 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 = [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(I, self).__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, "".encode('ascii'), "", (), [], {}, set()] for x in non_samples: self.assertNotIsInstance(x, Iterator) self.assertFalse(issubclass(type(x), Iterator), repr(type(x))) samples = [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) class NextOnlyNew(object): def __next__(self): yield 1 raise StopIteration self.assertNotIsInstance(NextOnlyNew(), 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 = [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 = [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, "", "".encode('ascii'), (), [], {}, 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: __metaclass__ = type __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_issue16373(self): # Recursion error comparing comparable and noncomparable # Set instances class MyComparableSet(Set): def __contains__(self, x): return False def __len__(self): return 0 def __iter__(self): return iter([]) class MyNonComparableSet(Set): def __contains__(self, x): return False def __len__(self): return 0 def __iter__(self): return iter([]) def __le__(self, x): return NotImplemented def __lt__(self, x): return NotImplemented cs = MyComparableSet() ncs = MyNonComparableSet() # Run all the variants to make sure they don't mutually recurse ncs < cs ncs <= cs ncs > cs ncs >= cs cs < ncs cs <= ncs cs > ncs cs >= ncs def assertSameSet(self, s1, s2): # coerce both to a real set then check equality self.assertEqual(set(s1), set(s2)) def test_Set_interoperability_with_real_sets(self): # Issue: 8743 class ListSet(Set): def __init__(self, elements=()): self.data = [] for elem in elements: if elem not in self.data: self.data.append(elem) def __contains__(self, elem): return elem in self.data def __iter__(self): return iter(self.data) def __len__(self): return len(self.data) def __repr__(self): return 'Set({!r})'.format(self.data) r1 = set('abc') r2 = set('bcd') r3 = set('abcde') f1 = ListSet('abc') f2 = ListSet('bcd') f3 = ListSet('abcde') l1 = list('abccba') l2 = list('bcddcb') l3 = list('abcdeedcba') p1 = sets.Set('abc') p2 = sets.Set('bcd') p3 = sets.Set('abcde') target = r1 & r2 self.assertSameSet(f1 & f2, target) self.assertSameSet(f1 & r2, target) self.assertSameSet(r2 & f1, target) self.assertSameSet(f1 & p2, target) self.assertSameSet(p2 & f1, target) self.assertSameSet(f1 & l2, target) target = r1 | r2 self.assertSameSet(f1 | f2, target) self.assertSameSet(f1 | r2, target) self.assertSameSet(r2 | f1, target) self.assertSameSet(f1 | p2, target) self.assertSameSet(p2 | f1, target) self.assertSameSet(f1 | l2, target) fwd_target = r1 - r2 rev_target = r2 - r1 self.assertSameSet(f1 - f2, fwd_target) self.assertSameSet(f2 - f1, rev_target) self.assertSameSet(f1 - r2, fwd_target) self.assertSameSet(f2 - r1, rev_target) self.assertSameSet(r1 - f2, fwd_target) self.assertSameSet(r2 - f1, rev_target) self.assertSameSet(f1 - p2, fwd_target) self.assertSameSet(f2 - p1, rev_target) self.assertSameSet(p1 - f2, fwd_target) self.assertSameSet(p2 - f1, rev_target) self.assertSameSet(f1 - l2, fwd_target) self.assertSameSet(f2 - l1, rev_target) target = r1 ^ r2 self.assertSameSet(f1 ^ f2, target) self.assertSameSet(f1 ^ r2, target) self.assertSameSet(r2 ^ f1, target) self.assertSameSet(f1 ^ p2, target) self.assertSameSet(p2 ^ f1, target) self.assertSameSet(f1 ^ l2, target) # proper subset self.assertTrue(f1 < f3) self.assertFalse(f1 < f1) self.assertFalse(f1 < f2) self.assertTrue(r1 < f3) self.assertFalse(r1 < f1) self.assertFalse(r1 < f2) self.assertTrue(r1 < r3) self.assertFalse(r1 < r1) self.assertFalse(r1 < r2) with test_support.check_py3k_warnings(): # python 2 only, cross-type compares will succeed f1 < l3 f1 < l1 f1 < l2 # any subset self.assertTrue(f1 <= f3) self.assertTrue(f1 <= f1) self.assertFalse(f1 <= f2) self.assertTrue(r1 <= f3) self.assertTrue(r1 <= f1) self.assertFalse(r1 <= f2) self.assertTrue(r1 <= r3) self.assertTrue(r1 <= r1) self.assertFalse(r1 <= r2) with test_support.check_py3k_warnings(): # python 2 only, cross-type compares will succeed f1 <= l3 f1 <= l1 f1 <= l2 # proper superset self.assertTrue(f3 > f1) self.assertFalse(f1 > f1) self.assertFalse(f2 > f1) self.assertTrue(r3 > r1) self.assertFalse(f1 > r1) self.assertFalse(f2 > r1) self.assertTrue(r3 > r1) self.assertFalse(r1 > r1) self.assertFalse(r2 > r1) with test_support.check_py3k_warnings(): # python 2 only, cross-type compares will succeed f1 > l3 f1 > l1 f1 > l2 # any superset self.assertTrue(f3 >= f1) self.assertTrue(f1 >= f1) self.assertFalse(f2 >= f1) self.assertTrue(r3 >= r1) self.assertTrue(f1 >= r1) self.assertFalse(f2 >= r1) self.assertTrue(r3 >= r1) self.assertTrue(r1 >= r1) self.assertFalse(r2 >= r1) with test_support.check_py3k_warnings(): # python 2 only, cross-type compares will succeed f1 >= l3 f1 >=l1 f1 >= l2 # equality self.assertTrue(f1 == f1) self.assertTrue(r1 == f1) self.assertTrue(f1 == r1) self.assertFalse(f1 == f3) self.assertFalse(r1 == f3) self.assertFalse(f1 == r3) # python 2 only, cross-type compares will succeed f1 == l3 f1 == l1 f1 == l2 # inequality self.assertFalse(f1 != f1) self.assertFalse(r1 != f1) self.assertFalse(f1 != r1) self.assertTrue(f1 != f3) self.assertTrue(r1 != f3) self.assertTrue(f1 != r3) # python 2 only, cross-type compares will succeed f1 != l3 f1 != l1 f1 != l2 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_Sequence(self): for sample in [tuple, list, str]: self.assertIsInstance(sample(), Sequence) self.assertTrue(issubclass(sample, Sequence)) self.assertTrue(issubclass(basestring, Sequence)) self.assertIsInstance(range(10), Sequence) self.assertTrue(issubclass(xrange, Sequence)) self.assertTrue(issubclass(str, Sequence)) self.validate_abstract_methods(Sequence, '__contains__', '__iter__', '__len__', '__getitem__') def test_MutableSequence(self): for sample in [tuple, str]: self.assertNotIsInstance(sample(), MutableSequence) self.assertFalse(issubclass(sample, MutableSequence)) for sample in [list]: self.assertIsInstance(sample(), MutableSequence) self.assertTrue(issubclass(sample, MutableSequence)) self.assertFalse(issubclass(basestring, MutableSequence)) self.validate_abstract_methods(MutableSequence, '__contains__', '__iter__', '__len__', '__getitem__', '__setitem__', '__delitem__', 'insert') 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) with test_support.check_py3k_warnings(): self.assertEqual(c.has_key('c'), True) self.assertEqual(c.has_key('z'), False) 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_init(self): self.assertEqual(list(Counter(self=42).items()), [('self', 42)]) self.assertEqual(list(Counter(iterable=42).items()), [('iterable', 42)]) self.assertEqual(list(Counter(iterable=None).items()), [('iterable', None)]) self.assertRaises(TypeError, Counter, 42) self.assertRaises(TypeError, Counter, (), ()) self.assertRaises(TypeError, Counter.__init__) def test_update(self): c = Counter() c.update(self=42) self.assertEqual(list(c.items()), [('self', 42)]) c = Counter() c.update(iterable=42) self.assertEqual(list(c.items()), [('iterable', 42)]) c = Counter() c.update(iterable=None) self.assertEqual(list(c.items()), [('iterable', None)]) self.assertRaises(TypeError, Counter().update, 42) self.assertRaises(TypeError, Counter().update, {}, {}) self.assertRaises(TypeError, Counter.update) 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)), cPickle.loads(cPickle.dumps(words, 0)), cPickle.loads(cPickle.dumps(words, 1)), cPickle.loads(cPickle.dumps(words, 2)), cPickle.loads(cPickle.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)) c = Counter() c.subtract(self=42) self.assertEqual(list(c.items()), [('self', -42)]) c = Counter() c.subtract(iterable=42) self.assertEqual(list(c.items()), [('iterable', -42)]) self.assertRaises(TypeError, Counter().subtract, 42) self.assertRaises(TypeError, Counter().subtract, {}, {}) self.assertRaises(TypeError, Counter.subtract) def test_main(verbose=None): NamedTupleDocs = doctest.DocTestSuite(module=collections) test_classes = [TestNamedTuple, NamedTupleDocs, TestOneTrickPonyABCs, TestCollectionABCs, TestCounter] test_support.run_unittest(*test_classes) test_support.run_doctest(collections, verbose) if __name__ == "__main__": test_main(verbose=True)
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