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Implement __contains__ for dict_keys and dict_items.

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(Not for dict_values, where it can't be done faster than
the default implementation which just iterates the elements.)
This commit is contained in:
Guido van Rossum 2007-02-10 18:55:06 +00:00
parent 83825acd1b
commit 3ac6741f79
2 changed files with 78 additions and 26 deletions
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22
Lib/test/test_dictviews.py
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@ -3,17 +3,39 @@ from test import test_support
class DictSetTest(unittest.TestCase):
def test_constructors_not_callable(self):
kt = type({}.KEYS())
self.assertRaises(TypeError, kt, {})
self.assertRaises(TypeError, kt)
it = type({}.ITEMS())
self.assertRaises(TypeError, it, {})
self.assertRaises(TypeError, it)
vt = type({}.VALUES())
self.assertRaises(TypeError, vt, {})
self.assertRaises(TypeError, vt)
def test_dict_keys(self):
d = {1: 10, "a": "ABC"}
keys = d.KEYS()
self.assertEqual(set(keys), {1, "a"})
self.assertEqual(len(keys), 2)
self.assert_(1 in keys)
self.assert_("a" in keys)
self.assert_(10 not in keys)
self.assert_("Z" not in keys)
def test_dict_items(self):
d = {1: 10, "a": "ABC"}
items = d.ITEMS()
self.assertEqual(set(items), {(1, 10), ("a", "ABC")})
self.assertEqual(len(items), 2)
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)
def test_dict_values(self):
d = {1: 10, "a": "ABC"}