Method test_basic_interface

tests/test_datastructures.py:84–262

(self)

        assert dict(md) == {**md} == {"a": 1}

    def test_basic_interface(self):
        md = self.storage_class()
        assert isinstance(md, dict)

        mapping = [
            ("a", 1),
            ("b", 2),
            ("a", 2),
            ("d", 3),
            ("a", 1),
            ("a", 3),
            ("d", 4),
            ("c", 3),
        ]
        md = self.storage_class(mapping)

        # simple getitem gives the first value
        assert md["a"] == 1
        assert md["c"] == 3
        with pytest.raises(KeyError):
            md["e"]
        assert md.get("a") == 1

        # list getitem
        assert md.getlist("a") == [1, 2, 1, 3]
        assert md.getlist("d") == [3, 4]
        # do not raise if key not found
        assert md.getlist("x") == []

        # simple setitem overwrites all values
        md["a"] = 42
        assert md.getlist("a") == [42]

        # list setitem
        md.setlist("a", [1, 2, 3])
        assert md["a"] == 1
        assert md.getlist("a") == [1, 2, 3]

        # verify that it does not change original lists
        l1 = [1, 2, 3]
        md.setlist("a", l1)
        del l1[:]
        assert md["a"] == 1

        # setdefault, setlistdefault
        assert md.setdefault("u", 23) == 23
        assert md.getlist("u") == [23]
        del md["u"]

        md.setlist("u", [-1, -2])

        # delitem
        del md["u"]
        with pytest.raises(KeyError):
            md["u"]
        del md["d"]
        assert md.getlist("d") == []