1 files changed, 185 insertions, 1 deletions
diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index f5dad7d..13401e9 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -1,6 +1,14 @@
+"""Unit tests for collections.py."""
+
 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):
 
@@ -51,11 +59,187 @@ class TestNamedTuple(unittest.TestCase):
         self.assertRaises(AttributeError, eval, 'p.z', locals())
 
 
+class TestOneTrickPonyABCs(unittest.TestCase):
+
+    def test_Hashable(self):
+        # Check some non-hashables
+        non_samples = [bytes(), 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(), unicode(),
+                   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().__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 = [bytes(), str(), unicode(),
+                   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().__iter__()
+        self.assertEqual(list(I()), [])
+        self.failIf(issubclass(str, I))
+
+    def test_Iterator(self):
+        non_samples = [None, 42, 3.14, 1j, b"", "", u"", (), [], {}, set()]
+        for x in non_samples:
+            self.failIf(isinstance(x, Iterator), repr(x))
+            self.failIf(issubclass(type(x), Iterator), repr(type(x)))
+        samples = [iter(bytes()), iter(str()), iter(unicode()),
+                   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 = [bytes(), str(), unicode(),
+                   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 = [bytes(), str(), unicode(),
+                   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,
+                       "", b"", (), [], {}, 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:
+                __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, bytes, 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, bytes]:
+            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)
 
+
 if __name__ == "__main__":
     test_main(verbose=True)