import io

from sdp.sheerkaSerializer import JsonSerializer


class ObjNoKey:
    """
    Object with no key, they won't be ordered
    Not suitable for Json dump as there is no to_dict() method
    """

    def __init__(self, a, b):
        self.a = a
        self.b = b

    def __hash__(self):
        return hash((self.a, self.b))

    def __eq__(self, obj):
        return isinstance(obj, ObjNoKey) and \
            self.a == obj.a and \
            self.b == obj.b

    def __repr__(self):
        return f"ObjNoKey({self.a}, {self.b})"


def test_i_can_json_serialize():
    json_serializer = JsonSerializer(lambda obj: True)
    obj = ObjNoKey("a", "b")
    stream = io.BytesIO()

    stream = json_serializer.dump(stream, obj, None)
    res = json_serializer.load(stream, None)
    assert res == obj