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✏️ test_dictviews.py
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import copy import pickle import sys import unittest import collections 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.assertIn(1, keys) self.assertIn("a", keys) self.assertNotIn(10, keys) self.assertNotIn("Z", 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.assertIn((1, 10), items) self.assertIn(("a", "ABC"), items) self.assertNotIn((1, 11), items) self.assertNotIn(1, items) self.assertNotIn((), items) self.assertNotIn((1,), items) self.assertNotIn((1, 2, 3), 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.assertIsInstance(repr(d), str) r = repr(d.viewitems()) self.assertIsInstance(r, str) self.assertTrue(r == "dict_items([('a', 'ABC'), (1, 10)])" or r == "dict_items([(1, 10), ('a', 'ABC')])") r = repr(d.viewkeys()) self.assertIsInstance(r, str) self.assertTrue(r == "dict_keys(['a', 1])" or r == "dict_keys([1, 'a'])") r = repr(d.viewvalues()) self.assertIsInstance(r, str) self.assertTrue(r == "dict_values(['ABC', 10])" or r == "dict_values([10, 'ABC'])") def test_keys_set_operations(self): d1 = {'a': 1, 'b': 2} d2 = {'b': 3, 'c': 2} d3 = {'d': 4, 'e': 5} self.assertEqual(d1.viewkeys() & d1.viewkeys(), {'a', 'b'}) self.assertEqual(d1.viewkeys() & d2.viewkeys(), {'b'}) self.assertEqual(d1.viewkeys() & d3.viewkeys(), set()) self.assertEqual(d1.viewkeys() & set(d1.viewkeys()), {'a', 'b'}) self.assertEqual(d1.viewkeys() & set(d2.viewkeys()), {'b'}) self.assertEqual(d1.viewkeys() & set(d3.viewkeys()), set()) self.assertEqual(d1.viewkeys() & tuple(d1.viewkeys()), {'a', 'b'}) self.assertEqual(d1.viewkeys() | d1.viewkeys(), {'a', 'b'}) self.assertEqual(d1.viewkeys() | d2.viewkeys(), {'a', 'b', 'c'}) self.assertEqual(d1.viewkeys() | d3.viewkeys(), {'a', 'b', 'd', 'e'}) self.assertEqual(d1.viewkeys() | set(d1.viewkeys()), {'a', 'b'}) self.assertEqual(d1.viewkeys() | set(d2.viewkeys()), {'a', 'b', 'c'}) self.assertEqual(d1.viewkeys() | set(d3.viewkeys()), {'a', 'b', 'd', 'e'}) self.assertEqual(d1.viewkeys() | (1, 2), {'a', 'b', 1, 2}) self.assertEqual(d1.viewkeys() ^ d1.viewkeys(), set()) self.assertEqual(d1.viewkeys() ^ d2.viewkeys(), {'a', 'c'}) self.assertEqual(d1.viewkeys() ^ d3.viewkeys(), {'a', 'b', 'd', 'e'}) self.assertEqual(d1.viewkeys() ^ set(d1.viewkeys()), set()) self.assertEqual(d1.viewkeys() ^ set(d2.viewkeys()), {'a', 'c'}) self.assertEqual(d1.viewkeys() ^ set(d3.viewkeys()), {'a', 'b', 'd', 'e'}) self.assertEqual(d1.viewkeys() ^ tuple(d2.keys()), {'a', 'c'}) self.assertEqual(d1.viewkeys() - d1.viewkeys(), set()) self.assertEqual(d1.viewkeys() - d2.viewkeys(), {'a'}) self.assertEqual(d1.viewkeys() - d3.viewkeys(), {'a', 'b'}) self.assertEqual(d1.viewkeys() - set(d1.viewkeys()), set()) self.assertEqual(d1.viewkeys() - set(d2.viewkeys()), {'a'}) self.assertEqual(d1.viewkeys() - set(d3.viewkeys()), {'a', 'b'}) self.assertEqual(d1.viewkeys() - (0, 1), {'a', 'b'}) def test_items_set_operations(self): d1 = {'a': 1, 'b': 2} d2 = {'a': 2, 'b': 2} d3 = {'d': 4, 'e': 5} self.assertEqual( d1.viewitems() & d1.viewitems(), {('a', 1), ('b', 2)}) self.assertEqual(d1.viewitems() & d2.viewitems(), {('b', 2)}) self.assertEqual(d1.viewitems() & d3.viewitems(), set()) self.assertEqual(d1.viewitems() & set(d1.viewitems()), {('a', 1), ('b', 2)}) self.assertEqual(d1.viewitems() & set(d2.viewitems()), {('b', 2)}) self.assertEqual(d1.viewitems() & set(d3.viewitems()), set()) self.assertEqual(d1.viewitems() | d1.viewitems(), {('a', 1), ('b', 2)}) self.assertEqual(d1.viewitems() | d2.viewitems(), {('a', 1), ('a', 2), ('b', 2)}) self.assertEqual(d1.viewitems() | d3.viewitems(), {('a', 1), ('b', 2), ('d', 4), ('e', 5)}) self.assertEqual(d1.viewitems() | set(d1.viewitems()), {('a', 1), ('b', 2)}) self.assertEqual(d1.viewitems() | set(d2.viewitems()), {('a', 1), ('a', 2), ('b', 2)}) self.assertEqual(d1.viewitems() | set(d3.viewitems()), {('a', 1), ('b', 2), ('d', 4), ('e', 5)}) self.assertEqual(d1.viewitems() ^ d1.viewitems(), set()) self.assertEqual(d1.viewitems() ^ d2.viewitems(), {('a', 1), ('a', 2)}) self.assertEqual(d1.viewitems() ^ d3.viewitems(), {('a', 1), ('b', 2), ('d', 4), ('e', 5)}) self.assertEqual(d1.viewitems() - d1.viewitems(), set()) self.assertEqual(d1.viewitems() - d2.viewitems(), {('a', 1)}) self.assertEqual(d1.viewitems() - d3.viewitems(), {('a', 1), ('b', 2)}) self.assertEqual(d1.viewitems() - set(d1.viewitems()), set()) self.assertEqual(d1.viewitems() - set(d2.viewitems()), {('a', 1)}) self.assertEqual(d1.viewitems() - set(d3.viewitems()), {('a', 1), ('b', 2)}) def test_recursive_repr(self): d = {} d[42] = d.viewvalues() r = repr(d) # Cannot perform a stronger test, as the contents of the repr # are implementation-dependent. All we can say is that we # want a str result, not an exception of any sort. self.assertIsInstance(r, str) d[42] = d.viewitems() r = repr(d) # Again. self.assertIsInstance(r, str) def test_deeply_nested_repr(self): d = {} for i in range(sys.getrecursionlimit() + 100): d = {42: d.viewvalues()} self.assertRaises(RuntimeError, repr, d) def test_abc_registry(self): d = dict(a=1) self.assertIsInstance(d.viewkeys(), collections.KeysView) self.assertIsInstance(d.viewkeys(), collections.MappingView) self.assertIsInstance(d.viewkeys(), collections.Set) self.assertIsInstance(d.viewkeys(), collections.Sized) self.assertIsInstance(d.viewkeys(), collections.Iterable) self.assertIsInstance(d.viewkeys(), collections.Container) self.assertIsInstance(d.viewvalues(), collections.ValuesView) self.assertIsInstance(d.viewvalues(), collections.MappingView) self.assertIsInstance(d.viewvalues(), collections.Sized) self.assertIsInstance(d.viewitems(), collections.ItemsView) self.assertIsInstance(d.viewitems(), collections.MappingView) self.assertIsInstance(d.viewitems(), collections.Set) self.assertIsInstance(d.viewitems(), collections.Sized) self.assertIsInstance(d.viewitems(), collections.Iterable) self.assertIsInstance(d.viewitems(), collections.Container) def test_copy(self): d = {1: 10, "a": "ABC"} self.assertRaises(TypeError, copy.copy, d.viewkeys()) self.assertRaises(TypeError, copy.copy, d.viewvalues()) self.assertRaises(TypeError, copy.copy, d.viewitems()) def test_pickle(self): d = {1: 10, "a": "ABC"} for proto in range(pickle.HIGHEST_PROTOCOL + 1): self.assertRaises((TypeError, pickle.PicklingError), pickle.dumps, d.viewkeys(), proto) self.assertRaises((TypeError, pickle.PicklingError), pickle.dumps, d.viewvalues(), proto) self.assertRaises((TypeError, pickle.PicklingError), pickle.dumps, d.viewitems(), proto) def test_main(): test_support.run_unittest(DictSetTest) if __name__ == "__main__": test_main()
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