import fsExtra from 'fs-extra';
/**
 * Filesystem class exposes a consistent API to create, read and delete
 * files during tests. Apart from the generic CRUD operations, it
 * also takes care of the remove the modules from Node.js cache.
 *
 * ```js
 * const fs = new Filesystem()
 *
 * await fs.add('routes.js', `module.exports = 'routes'`)
 * await fs.remove('routes.js') // clears require cache
 *
 * // do it after every test to cleanup all generated files
 * await fs.cleanup()
 * ```
 */
export declare class Filesystem {
    basePath: string;
    private modules;
    /**
     * Reference to fsExtra
     */
    fsExtra: typeof fsExtra;
    constructor(basePath?: string);
    /**
     * Returns a boolean telling if file extension is part
     * of a Node.js module
     */
    private isModule;
    /**
     * Makes abs path to a given file
     */
    private makePath;
    /**
     * Removes ext from the file path
     */
    private dropExt;
    /**
     * Removes the file path from nodejs module cache
     */
    private removeFromModulesCache;
    /**
     * Store reference of a given file to clear it from the
     * modules cache at a later stage
     */
    private trackModule;
    /**
     * Add a new file with given contents
     */
    add(filePath: string, contents: string): Promise<void>;
    /**
     * Returns true when file exists on the disk
     */
    exists(filePath: string): Promise<boolean>;
    /**
     * Creates base path dir (if missing)
     */
    ensureRoot(): Promise<void>;
    /**
     * Returns file contents
     */
    get(filePath: string): Promise<string>;
    /**
     * Remove file
     */
    remove(filePath: string): Promise<void>;
    /**
     * Cleanup all files and modules cache (if any)
     */
    cleanup(): Promise<void>;
}