[FastAPI docs for Custom Docs UI Static Assets](https://fastapi.tiangolo.com/how-to/custom-docs-ui-assets/)
            """
        ),
    ] = "https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui.css",
    swagger_favicon_url: Annotated[
        str,
        Doc(
            """
            The URL of the favicon to use. It is normally shown in the browser tab.
            """
        ),

    swagger_favicon_url = sig.parameters.get("swagger_favicon_url").default  # type: ignore
    html = get_swagger_ui_html(openapi_url="/docs", title="title")
    body_content = html.body.decode()
    assert swagger_js_url in body_content
    assert swagger_css_url in body_content
    assert swagger_favicon_url in body_content


def test_strings_in_custom_swagger():