interface ChaiAssertionError extends Error {
    actual?: unknown;
    expected?: unknown;
    operator?: string;
    showDiff?: boolean;
}
declare const isChaiAssertionError: (error: unknown) => error is ChaiAssertionError;
declare const formatChaiError: (error: ChaiAssertionError) => {
    type: string;
    actual: {} | null;
    expected: {} | null;
    operator: string | undefined;
    message?: undefined;
} | {
    type: string;
    message: string;
    actual?: undefined;
    expected?: undefined;
    operator?: undefined;
};
declare const printChaiError: (error: ChaiAssertionError) => void;
export { isChaiAssertionError, formatChaiError, printChaiError };