export declare const tests: {
    "scan returns a sequence of intermediate reductions"(): Promise<void>;
    "scan throws an error if sequence is empty"(): Promise<void>;
    "scan can accept a seed value which is used as the initial accumulator"(): Promise<void>;
    "can returns a sequence just of the initial value when given empty sequence"(): Promise<void>;
    "scan iterator closing"(): Promise<void>;
    "scan iterator closing on reducer error"(): Promise<void>;
};