| """Unit tests for collections.py.""" |
| |
| import collections |
| import copy |
| import doctest |
| import keyword |
| import operator |
| import pickle |
| from random import choice, randrange |
| import re |
| import string |
| import sys |
| from test import support |
| import unittest |
| |
| from collections import namedtuple, Counter, OrderedDict, _count_elements |
| from collections import UserDict |
| from collections import ChainMap |
| from collections.abc import Hashable, Iterable, Iterator |
| from collections.abc import Sized, Container, Callable |
| from collections.abc import Set, MutableSet |
| from collections.abc import Mapping, MutableMapping, KeysView, ItemsView |
| from collections.abc import Sequence, MutableSequence |
| from collections.abc import ByteString |
| |
| |
| ################################################################################ |
| ### ChainMap (helper class for configparser and the string module) |
| ################################################################################ |
| |
| 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) |
| |
| # check deep copies |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| e = pickle.loads(pickle.dumps(d, proto)) |
| 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) |
| for e in [copy.deepcopy(d), |
| eval(repr(d)) |
| ]: |
| 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)) |
| |
| def test_new_child(self): |
| 'Tests for changes for issue #16613.' |
| c = ChainMap() |
| c['a'] = 1 |
| c['b'] = 2 |
| m = {'b':20, 'c': 30} |
| d = c.new_child(m) |
| self.assertEqual(d.maps, [{'b':20, 'c':30}, {'a':1, 'b':2}]) # check internal state |
| self.assertIs(m, d.maps[0]) |
| |
| # Use a different map than a dict |
| class lowerdict(dict): |
| def __getitem__(self, key): |
| if isinstance(key, str): |
| key = key.lower() |
| return dict.__getitem__(self, key) |
| def __contains__(self, key): |
| if isinstance(key, str): |
| key = key.lower() |
| return dict.__contains__(self, key) |
| |
| c = ChainMap() |
| c['a'] = 1 |
| c['b'] = 2 |
| m = lowerdict(b=20, c=30) |
| d = c.new_child(m) |
| self.assertIs(m, d.maps[0]) |
| 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) |
| |
| |
| ################################################################################ |
| ### 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.assertIn('class Point(tuple)', Point._source) |
| |
| 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 |
| |
| 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: |
| 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 = 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 range(-1, module.HIGHEST_PROTOCOL + 1): |
| q = loads(dumps(p, protocol)) |
| self.assertEqual(p, q) |
| self.assertEqual(p._fields, q._fields) |
| self.assertNotIn(b'OrderedDict', dumps(p, protocol)) |
| |
| 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)') |
| |
| def test_source(self): |
| # verify that _source can be run through exec() |
| tmp = namedtuple('NTColor', 'red green blue') |
| globals().pop('NTColor', None) # remove artifacts from other tests |
| exec(tmp._source, globals()) |
| self.assertIn('NTColor', globals()) |
| c = NTColor(10, 20, 30) |
| self.assertEqual((c.red, c.green, c.blue), (10, 20, 30)) |
| self.assertEqual(NTColor._fields, ('red', 'green', 'blue')) |
| globals().pop('NTColor', None) # clean-up after this test |
| |
| |
| def test_namedtuple_subclass_issue_24931(self): |
| class Point(namedtuple('_Point', ['x', 'y'])): |
| pass |
| |
| a = Point(3, 4) |
| self.assertEqual(a._asdict(), OrderedDict([('x', 3), ('y', 4)])) |
| |
| a.w = 5 |
| self.assertEqual(a.__dict__, {'w': 5}) |
| |
| |
| ################################################################################ |
| ### 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_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() |
| self.assertFalse(ncs < cs) |
| self.assertTrue(ncs <= cs) |
| self.assertFalse(ncs > cs) |
| self.assertTrue(ncs >= cs) |
| |
| def assertSameSet(self, s1, s2): |
| # coerce both to a real set then check equality |
| self.assertSetEqual(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') |
| |
| target = r1 & r2 |
| self.assertSameSet(f1 & f2, target) |
| self.assertSameSet(f1 & r2, target) |
| self.assertSameSet(r2 & 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 | 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 - 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 ^ l2, target) |
| |
| # Don't change the following to use assertLess or other |
| # "more specific" unittest assertions. The current |
| # assertTrue/assertFalse style makes the pattern of test |
| # case combinations clear and allows us to know for sure |
| # the exact operator being invoked. |
| |
| # 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 self.assertRaises(TypeError): |
| f1 < l3 |
| with self.assertRaises(TypeError): |
| f1 < l1 |
| with self.assertRaises(TypeError): |
| 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 self.assertRaises(TypeError): |
| f1 <= l3 |
| with self.assertRaises(TypeError): |
| f1 <= l1 |
| with self.assertRaises(TypeError): |
| 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 self.assertRaises(TypeError): |
| f1 > l3 |
| with self.assertRaises(TypeError): |
| f1 > l1 |
| with self.assertRaises(TypeError): |
| 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 self.assertRaises(TypeError): |
| f1 >= l3 |
| with self.assertRaises(TypeError): |
| f1 >=l1 |
| with self.assertRaises(TypeError): |
| 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) |
| self.assertFalse(f1 == l3) |
| self.assertFalse(f1 == l1) |
| self.assertFalse(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) |
| self.assertTrue(f1 != l3) |
| self.assertTrue(f1 != l1) |
| self.assertTrue(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_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.assertIsInstance(memoryview(b""), Sequence) |
| self.assertTrue(issubclass(memoryview, 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') |
| |
| def test_MutableSequence_mixins(self): |
| # Test the mixins of MutableSequence by creating a miminal concrete |
| # class inherited from it. |
| class MutableSequenceSubclass(MutableSequence): |
| def __init__(self): |
| self.lst = [] |
| |
| def __setitem__(self, index, value): |
| self.lst[index] = value |
| |
| def __getitem__(self, index): |
| return self.lst[index] |
| |
| def __len__(self): |
| return len(self.lst) |
| |
| def __delitem__(self, index): |
| del self.lst[index] |
| |
| def insert(self, index, value): |
| self.lst.insert(index, value) |
| |
| mss = MutableSequenceSubclass() |
| mss.append(0) |
| mss.extend((1, 2, 3, 4)) |
| self.assertEqual(len(mss), 5) |
| self.assertEqual(mss[3], 3) |
| mss.reverse() |
| self.assertEqual(mss[3], 1) |
| mss.pop() |
| self.assertEqual(len(mss), 4) |
| mss.remove(3) |
| self.assertEqual(len(mss), 3) |
| mss += (10, 20, 30) |
| self.assertEqual(len(mss), 6) |
| self.assertEqual(mss[-1], 30) |
| mss.clear() |
| self.assertEqual(len(mss), 0) |
| |
| ################################################################################ |
| ### Counter |
| ################################################################################ |
| |
| class CounterSubclassWithSetItem(Counter): |
| # Test a counter subclass that overrides __setitem__ |
| def __init__(self, *args, **kwds): |
| self.called = False |
| Counter.__init__(self, *args, **kwds) |
| def __setitem__(self, key, value): |
| self.called = True |
| Counter.__setitem__(self, key, value) |
| |
| class CounterSubclassWithGet(Counter): |
| # Test a counter subclass that overrides get() |
| def __init__(self, *args, **kwds): |
| self.called = False |
| Counter.__init__(self, *args, **kwds) |
| def get(self, key, default): |
| self.called = True |
| return Counter.get(self, key, default) |
| |
| 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_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()) |
| def check(dup): |
| msg = "\ncopy: %s\nwords: %s" % (dup, words) |
| self.assertIsNot(dup, words, msg) |
| self.assertEqual(dup, words) |
| check(words.copy()) |
| check(copy.copy(words)) |
| check(copy.deepcopy(words)) |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| with self.subTest(proto=proto): |
| check(pickle.loads(pickle.dumps(words, proto))) |
| check(eval(repr(words))) |
| update_test = Counter() |
| update_test.update(words) |
| check(update_test) |
| check(Counter(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_inplace_operations(self): |
| 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 inplace_op, regular_op in [ |
| (Counter.__iadd__, Counter.__add__), |
| (Counter.__isub__, Counter.__sub__), |
| (Counter.__ior__, Counter.__or__), |
| (Counter.__iand__, Counter.__and__), |
| ]: |
| c = p.copy() |
| c_id = id(c) |
| regular_result = regular_op(c, q) |
| inplace_result = inplace_op(c, q) |
| self.assertEqual(inplace_result, regular_result) |
| self.assertEqual(id(inplace_result), c_id) |
| |
| 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_unary(self): |
| c = Counter(a=-5, b=0, c=5, d=10, e=15,g=40) |
| self.assertEqual(dict(+c), dict(c=5, d=10, e=15, g=40)) |
| self.assertEqual(dict(-c), dict(a=5)) |
| |
| 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)])) |
| |
| # test fidelity to the pure python version |
| c = CounterSubclassWithSetItem('abracadabra') |
| self.assertTrue(c.called) |
| self.assertEqual(dict(c), {'a': 5, 'b': 2, 'c': 1, 'd': 1, 'r':2 }) |
| c = CounterSubclassWithGet('abracadabra') |
| self.assertTrue(c.called) |
| self.assertEqual(dict(c), {'a': 5, 'b': 2, 'c': 1, 'd': 1, 'r':2 }) |
| |
| |
| ################################################################################ |
| ### Run tests |
| ################################################################################ |
| |
| def test_main(verbose=None): |
| NamedTupleDocs = doctest.DocTestSuite(module=collections) |
| test_classes = [TestNamedTuple, NamedTupleDocs, TestOneTrickPonyABCs, |
| TestCollectionABCs, TestCounter, TestChainMap] |
| support.run_unittest(*test_classes) |
| support.run_doctest(collections, verbose) |
| |
| |
| if __name__ == "__main__": |
| test_main(verbose=True) |