import { CdnEvent } from '../lib';
import { ContextTrait } from '../lib/workers-pool';
export declare const testBackendConfig: import("../lib").BackendConfiguration;
/**
 *
 * @param packages path (string) from 'tests' directory (e.g. './packages/root.zip')
 */
export declare function installPackages$(packages: string[]): import("rxjs").Observable<any[]>;
export declare function getPyYouwolBasePath(): any;
export declare function resetPyYouwolDbs$(): import("@youwol/http-primitives").HTTPResponse$<unknown>;
export declare function cleanDocument(): void;
export declare function saveScreen(filename: string): void;
export declare function expectEvents(events: CdnEvent[], names: string[]): void;
export declare class TestContext implements ContextTrait {
    readonly prefix = "";
    readonly indent = 0;
    readonly t0: number;
    constructor(params?: {
        prefix?: string;
        t0?: number;
    });
    withChild<T>(name: string, cb: (ctx: ContextTrait) => T): T;
    info(text: string): void;
}