from hooked_containers.mapping import HookedMapping


class TestHookedMapping:
    class TestConstruction:
        def test_empty(self):
            m = HookedMapping({})
            assert m._data == {}
            assert dict(m) == {}

        def test_with_existing(self):
            existing = {"a": 1, "b": 2}
            og_id = id(existing)
            m = HookedMapping(existing)
            assert id(m._data) == og_id
            assert dict(m) == existing

        def test_nesting(self):
            existing = {"a": {"x": 1}, "b": {"y": 2}}
            m = HookedMapping(existing)
            assert dict(m) == existing
            assert dict(m["a"]) == {"x": 1}
            assert dict(m["b"]) == {"y": 2}

    class TestMappingOps:
        def test_setitem(self):
            added = []
            m = HookedMapping({}, lambda e: added.append(e.item))
            m["a"] = 1
            assert m._data == {"a": 1}
            assert added == [1]

        def test_nested_setitem(self):
            added = []
            m = HookedMapping({"a": {}}, lambda e: added.append(e.item))
            m["a"]["x"] = 1
            assert m._data == {"a": {"x": 1}}
            assert added == [1]

        def test_getitem(self):
            m = HookedMapping({"a": 1})
            assert m["a"] == 1

        def test_delitem(self):
            m = HookedMapping({"a": 1})
            del m["a"]
            assert not m["a"]