python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Lib/test/test_compare.py

@@ -0,0 +1,124 @@
+import unittest
+
+class Empty:
+    def __repr__(self):
+        return '<Empty>'
+
+class Cmp:
+    def __init__(self,arg):
+        self.arg = arg
+
+    def __repr__(self):
+        return '<Cmp %s>' % self.arg
+
+    def __eq__(self, other):
+        return self.arg == other
+
+class Anything:
+    def __eq__(self, other):
+        return True
+
+    def __ne__(self, other):
+        return False
+
+class ComparisonTest(unittest.TestCase):
+    set1 = [2, 2.0, 2, 2+0j, Cmp(2.0)]
+    set2 = [[1], (3,), None, Empty()]
+    candidates = set1 + set2
+
+    def test_comparisons(self):
+        for a in self.candidates:
+            for b in self.candidates:
+                if ((a in self.set1) and (b in self.set1)) or a is b:
+                    self.assertEqual(a, b)
+                else:
+                    self.assertNotEqual(a, b)
+
+    def test_id_comparisons(self):
+        # Ensure default comparison compares id() of args
+        L = []
+        for i in range(10):
+            L.insert(len(L)//2, Empty())
+        for a in L:
+            for b in L:
+                self.assertEqual(a == b, id(a) == id(b),
+                                 'a=%r, b=%r' % (a, b))
+
+    def test_ne_defaults_to_not_eq(self):
+        a = Cmp(1)
+        b = Cmp(1)
+        c = Cmp(2)
+        self.assertIs(a == b, True)
+        self.assertIs(a != b, False)
+        self.assertIs(a != c, True)
+
+    def test_ne_high_priority(self):
+        """object.__ne__() should allow reflected __ne__() to be tried"""
+        calls = []
+        class Left:
+            # Inherits object.__ne__()
+            def __eq__(*args):
+                calls.append('Left.__eq__')
+                return NotImplemented
+        class Right:
+            def __eq__(*args):
+                calls.append('Right.__eq__')
+                return NotImplemented
+            def __ne__(*args):
+                calls.append('Right.__ne__')
+                return NotImplemented
+        Left() != Right()
+        self.assertSequenceEqual(calls, ['Left.__eq__', 'Right.__ne__'])
+
+    def test_ne_low_priority(self):
+        """object.__ne__() should not invoke reflected __eq__()"""
+        calls = []
+        class Base:
+            # Inherits object.__ne__()
+            def __eq__(*args):
+                calls.append('Base.__eq__')
+                return NotImplemented
+        class Derived(Base):  # Subclassing forces higher priority
+            def __eq__(*args):
+                calls.append('Derived.__eq__')
+                return NotImplemented
+            def __ne__(*args):
+                calls.append('Derived.__ne__')
+                return NotImplemented
+        Base() != Derived()
+        self.assertSequenceEqual(calls, ['Derived.__ne__', 'Base.__eq__'])
+
+    def test_other_delegation(self):
+        """No default delegation between operations except __ne__()"""
+        ops = (
+            ('__eq__', lambda a, b: a == b),
+            ('__lt__', lambda a, b: a < b),
+            ('__le__', lambda a, b: a <= b),
+            ('__gt__', lambda a, b: a > b),
+            ('__ge__', lambda a, b: a >= b),
+        )
+        for name, func in ops:
+            with self.subTest(name):
+                def unexpected(*args):
+                    self.fail('Unexpected operator method called')
+                class C:
+                    __ne__ = unexpected
+                for other, _ in ops:
+                    if other != name:
+                        setattr(C, other, unexpected)
+                if name == '__eq__':
+                    self.assertIs(func(C(), object()), False)
+                else:
+                    self.assertRaises(TypeError, func, C(), object())
+
+    def test_issue_1393(self):
+        x = lambda: None
+        self.assertEqual(x, Anything())
+        self.assertEqual(Anything(), x)
+        y = object()
+        self.assertEqual(y, Anything())
+        self.assertEqual(Anything(), y)
+
+
+if __name__ == '__main__':
+    unittest.main()