def resource_config() -> dict[str, str]:
    """A resource config dictionary for test purposes."""
    return {
        "accessService": "optimade",
        "accessUrl": (
            "https://example.org/some/base/v0.1/optimade/v1/structures"
            '?filter=elements HAS ALL "Si","O"&sort=nelements&page_limit=2'
        ),
    }