(self)
| 172 | self.assertTrue(ChainMap({}, {1:2})) |
| 173 | |
| 174 | def test_missing(self): |
| 175 | class DefaultChainMap(ChainMap): |
| 176 | def __missing__(self, key): |
| 177 | return 999 |
| 178 | d = DefaultChainMap(dict(a=1, b=2), dict(b=20, c=30)) |
| 179 | for k, v in dict(a=1, b=2, c=30, d=999).items(): |
| 180 | self.assertEqual(d[k], v) # check __getitem__ w/missing |
| 181 | for k, v in dict(a=1, b=2, c=30, d=77).items(): |
| 182 | self.assertEqual(d.get(k, 77), v) # check get() w/ missing |
| 183 | for k, v in dict(a=True, b=True, c=True, d=False).items(): |
| 184 | self.assertEqual(k in d, v) # check __contains__ w/missing |
| 185 | self.assertEqual(d.pop('a', 1001), 1, d) |
| 186 | self.assertEqual(d.pop('a', 1002), 1002) # check pop() w/missing |
| 187 | self.assertEqual(d.popitem(), ('b', 2)) # check popitem() w/missing |
| 188 | with self.assertRaises(KeyError): |
| 189 | d.popitem() |
| 190 | |
| 191 | def test_order_preservation(self): |
| 192 | d = ChainMap( |
nothing calls this directly
no test coverage detected