/** A single failed case (or a whole failed fixture file, when `case` is a placeholder). */
export interface FailedCase {
    file: string;
    case: string;
    message: string;
}
export interface FnTestRunResult {
    passed: number;
    failed: FailedCase[];
}
/** Run every `*.fn.test.yaml` fixture under `<setDir>/rules/` and tally pass/fail. */
export declare function runFnTests(setDir: string): Promise<FnTestRunResult>;