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