Issue #1967: Backport dictionary views.
diff --git a/Lib/test/test_dictviews.py b/Lib/test/test_dictviews.py
new file mode 100644
index 0000000..8821139
--- /dev/null
+++ b/Lib/test/test_dictviews.py
@@ -0,0 +1,84 @@
+import unittest
+from test import test_support
+
+class DictSetTest(unittest.TestCase):
+
+ def test_constructors_not_callable(self):
+ kt = type({}.viewkeys())
+ self.assertRaises(TypeError, kt, {})
+ self.assertRaises(TypeError, kt)
+ it = type({}.viewitems())
+ self.assertRaises(TypeError, it, {})
+ self.assertRaises(TypeError, it)
+ vt = type({}.viewvalues())
+ self.assertRaises(TypeError, vt, {})
+ self.assertRaises(TypeError, vt)
+
+ def test_dict_keys(self):
+ d = {1: 10, "a": "ABC"}
+ keys = d.viewkeys()
+ self.assertEqual(len(keys), 2)
+ self.assertEqual(set(keys), set([1, "a"]))
+ self.assertEqual(keys, set([1, "a"]))
+ self.assertNotEqual(keys, set([1, "a", "b"]))
+ self.assertNotEqual(keys, set([1, "b"]))
+ self.assertNotEqual(keys, set([1]))
+ self.assertNotEqual(keys, 42)
+ self.assert_(1 in keys)
+ self.assert_("a" in keys)
+ self.assert_(10 not in keys)
+ self.assert_("Z" not in keys)
+ self.assertEqual(d.viewkeys(), d.viewkeys())
+ e = {1: 11, "a": "def"}
+ self.assertEqual(d.viewkeys(), e.viewkeys())
+ del e["a"]
+ self.assertNotEqual(d.viewkeys(), e.viewkeys())
+
+ def test_dict_items(self):
+ d = {1: 10, "a": "ABC"}
+ items = d.viewitems()
+ self.assertEqual(len(items), 2)
+ self.assertEqual(set(items), set([(1, 10), ("a", "ABC")]))
+ self.assertEqual(items, set([(1, 10), ("a", "ABC")]))
+ self.assertNotEqual(items, set([(1, 10), ("a", "ABC"), "junk"]))
+ self.assertNotEqual(items, set([(1, 10), ("a", "def")]))
+ self.assertNotEqual(items, set([(1, 10)]))
+ self.assertNotEqual(items, 42)
+ self.assert_((1, 10) in items)
+ self.assert_(("a", "ABC") in items)
+ self.assert_((1, 11) not in items)
+ self.assert_(1 not in items)
+ self.assert_(() not in items)
+ self.assert_((1,) not in items)
+ self.assert_((1, 2, 3) not in items)
+ self.assertEqual(d.viewitems(), d.viewitems())
+ e = d.copy()
+ self.assertEqual(d.viewitems(), e.viewitems())
+ e["a"] = "def"
+ self.assertNotEqual(d.viewitems(), e.viewitems())
+
+ def test_dict_mixed_keys_items(self):
+ d = {(1, 1): 11, (2, 2): 22}
+ e = {1: 1, 2: 2}
+ self.assertEqual(d.viewkeys(), e.viewitems())
+ self.assertNotEqual(d.viewitems(), e.viewkeys())
+
+ def test_dict_values(self):
+ d = {1: 10, "a": "ABC"}
+ values = d.viewvalues()
+ self.assertEqual(set(values), set([10, "ABC"]))
+ self.assertEqual(len(values), 2)
+
+ def test_dict_repr(self):
+ d = {1: 10, "a": "ABC"}
+ self.assertTrue(isinstance(repr(d), str))
+ self.assertTrue(isinstance(repr(d.viewitems()), str))
+ self.assertTrue(isinstance(repr(d.viewkeys()), str))
+ self.assertTrue(isinstance(repr(d.viewvalues()), str))
+
+
+def test_main():
+ test_support.run_unittest(DictSetTest)
+
+if __name__ == "__main__":
+ test_main()