def test_timestamp_seconds():
    attr.validate(Timestamp(seconds=0, microseconds=0))
    with pytest.raises(AttributeTypeError):
        attr.validate(Timestamp(seconds='0', microseconds=0))

    attr.validate(Timestamp(seconds=2**63-1, microseconds=0))
    with pytest.raises(ValueError):
        attr.validate(Timestamp(seconds=2**63, microseconds=0))

    attr.validate(Timestamp(seconds=-2**63, microseconds=0))
    with pytest.raises(ValueError):
        attr.validate(Timestamp(seconds=-2**63-1, microseconds=0))