export declare type Describe = (what: string, callback: () => void) => void;
export interface It {
    (should: string, callback: () => void): void;
    only: It;
}
export interface Matcher {
    not: Matcher;
    toBe(value: any): void;
    toBeLessThanOrEqual(value: number): void;
    toBeGreaterThanOrEqual(value: number): void;
    toEqual(value: any): void;
    toMatchSnapshot(): void;
    toThrow(value: any): void;
}
export declare type FunctionCaller = (fn: () => void) => void;
export declare type Expect = (value: any) => Matcher;
declare const _describe: Describe;
declare const _it: It;
declare const _expect: Expect;
declare const _beforeEach: FunctionCaller;
declare const _afterEach: FunctionCaller;
export { _describe as describe, _it as it, _expect as expect, _beforeEach as beforeEach, _afterEach as afterEach, };
export declare function mockRandomValues(): void;
export declare function restore(): void;