Backport of _abccoll.py by Benjamin Arangueren, issue 1383.
With some changes of my own thrown in (e.g. backport of r58107).
diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index 7c5b2dc..52bae9a 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -1,6 +1,12 @@
import unittest
from test import test_support
from collections import namedtuple
+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
+
class TestNamedTuple(unittest.TestCase):
@@ -86,9 +92,187 @@
Dot = namedtuple('Dot', 'd')
self.assertEqual(Dot(1), (1,))
+
+class TestOneTrickPonyABCs(unittest.TestCase):
+
+ def test_Hashable(self):
+ # Check some non-hashables
+ non_samples = [list(), set(), dict()]
+ for x in non_samples:
+ self.failIf(isinstance(x, Hashable), repr(x))
+ self.failIf(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.failUnless(isinstance(x, Hashable), repr(x))
+ self.failUnless(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__()
+ self.assertEqual(hash(H()), 0)
+ self.failIf(issubclass(int, H))
+
+ def test_Iterable(self):
+ # Check some non-iterables
+ non_samples = [None, 42, 3.14, 1j]
+ for x in non_samples:
+ self.failIf(isinstance(x, Iterable), repr(x))
+ self.failIf(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.failUnless(isinstance(x, Iterable), repr(x))
+ self.failUnless(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.failIf(issubclass(str, I))
+
+ def test_Iterator(self):
+ non_samples = [None, 42, 3.14, 1j, "".encode('ascii'), "", (), [],
+ {}, set()]
+ for x in non_samples:
+ self.failIf(isinstance(x, Iterator), repr(x))
+ self.failIf(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.failUnless(isinstance(x, Iterator), repr(x))
+ self.failUnless(issubclass(type(x), Iterator), repr(type(x)))
+
+ def test_Sized(self):
+ non_samples = [None, 42, 3.14, 1j,
+ (lambda: (yield))(),
+ (x for x in []),
+ ]
+ for x in non_samples:
+ self.failIf(isinstance(x, Sized), repr(x))
+ self.failIf(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.failUnless(isinstance(x, Sized), repr(x))
+ self.failUnless(issubclass(type(x), Sized), repr(type(x)))
+
+ def test_Container(self):
+ non_samples = [None, 42, 3.14, 1j,
+ (lambda: (yield))(),
+ (x for x in []),
+ ]
+ for x in non_samples:
+ self.failIf(isinstance(x, Container), repr(x))
+ self.failIf(issubclass(type(x), Container), repr(type(x)))
+ samples = [str(),
+ tuple(), list(), set(), frozenset(), dict(),
+ dict().keys(), dict().items(),
+ ]
+ for x in samples:
+ self.failUnless(isinstance(x, Container), repr(x))
+ self.failUnless(issubclass(type(x), Container), repr(type(x)))
+
+ 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.failIf(isinstance(x, Callable), repr(x))
+ self.failIf(issubclass(type(x), Callable), repr(type(x)))
+ samples = [lambda: None,
+ type, int, object,
+ len,
+ list.append, [].append,
+ ]
+ for x in samples:
+ self.failUnless(isinstance(x, Callable), repr(x))
+ self.failUnless(issubclass(type(x), Callable), repr(type(x)))
+
+ def test_direct_subclassing(self):
+ for B in Hashable, Iterable, Iterator, Sized, Container, Callable:
+ class C(B):
+ pass
+ self.failUnless(issubclass(C, B))
+ self.failIf(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.failIf(issubclass(C, B), B.__name__)
+ B.register(C)
+ self.failUnless(issubclass(C, B))
+
+
+class TestCollectionABCs(unittest.TestCase):
+
+ # 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.failUnless(isinstance(sample(), Set))
+ self.failUnless(issubclass(sample, Set))
+
+ def test_MutableSet(self):
+ self.failUnless(isinstance(set(), MutableSet))
+ self.failUnless(issubclass(set, MutableSet))
+ self.failIf(isinstance(frozenset(), MutableSet))
+ self.failIf(issubclass(frozenset, MutableSet))
+
+ def test_Mapping(self):
+ for sample in [dict]:
+ self.failUnless(isinstance(sample(), Mapping))
+ self.failUnless(issubclass(sample, Mapping))
+
+ def test_MutableMapping(self):
+ for sample in [dict]:
+ self.failUnless(isinstance(sample(), MutableMapping))
+ self.failUnless(issubclass(sample, MutableMapping))
+
+ def test_Sequence(self):
+ for sample in [tuple, list, str]:
+ self.failUnless(isinstance(sample(), Sequence))
+ self.failUnless(issubclass(sample, Sequence))
+ self.failUnless(issubclass(basestring, Sequence))
+
+ def test_MutableSequence(self):
+ for sample in [tuple, str]:
+ self.failIf(isinstance(sample(), MutableSequence))
+ self.failIf(issubclass(sample, MutableSequence))
+ for sample in [list]:
+ self.failUnless(isinstance(sample(), MutableSequence))
+ self.failUnless(issubclass(sample, MutableSequence))
+ self.failIf(issubclass(basestring, MutableSequence))
+
+
def test_main(verbose=None):
import collections as CollectionsModule
- test_classes = [TestNamedTuple]
+ test_classes = [TestNamedTuple, TestOneTrickPonyABCs, TestCollectionABCs]
test_support.run_unittest(*test_classes)
test_support.run_doctest(CollectionsModule, verbose)