Method test_update

Lib/test/mapping_tests.py:196–289

(self)

        self.assertRaises(KeyError, p.popitem)

    def test_update(self):
        # mapping argument
        d = self._empty_mapping()
        d.update(self.other)
        self.assertEqual(list(d.items()), list(self.other.items()))

        # No argument
        d = self._empty_mapping()
        d.update()
        self.assertEqual(d, self._empty_mapping())

        # item sequence
        d = self._empty_mapping()
        d.update(self.other.items())
        self.assertEqual(list(d.items()), list(self.other.items()))

        # Iterator
        d = self._empty_mapping()
        d.update(self.other.items())
        self.assertEqual(list(d.items()), list(self.other.items()))

        # FIXME: Doesn't work with UserDict
        # self.assertRaises((TypeError, AttributeError), d.update, None)
        self.assertRaises((TypeError, AttributeError), d.update, 42)

        outerself = self
        class SimpleUserDict:
            def __init__(self):
                self.d = outerself.reference
            def keys(self):
                return self.d.keys()
            def __getitem__(self, i):
                return self.d[i]
        d.clear()
        d.update(SimpleUserDict())
        i1 = sorted(d.items())
        i2 = sorted(self.reference.items())
        self.assertEqual(i1, i2)

        class Exc(Exception): pass

        d = self._empty_mapping()
        class FailingUserDict:
            def keys(self):
                raise Exc
        self.assertRaises(Exc, d.update, FailingUserDict())

        d.clear()

        class FailingUserDict:
            def keys(self):
                class BogonIter:
                    def __init__(self):
                        self.i = 1
                    def __iter__(self):
                        return self
                    def __next__(self):
                        if self.i: