import checkDiskSpace from 'check-disk-space';
import { HealthIndicator, HealthIndicatorResult } from '../';
import { DiskHealthIndicatorOptions } from './disk-health-options.type';
declare type CheckDiskSpace = typeof checkDiskSpace;
/**
 * The DiskHealthIndicator contains checks which are related
 * to the disk storage of the current running machine
 *
 * @publicApi
 * @module TerminusModule
 */
export declare class DiskHealthIndicator extends HealthIndicator {
    private checkDiskSpace;
    /**
     * Initializes the health indicator
     *
     * @param {CheckDiskSpace} checkDiskSpace The check-disk-space library
     *
     * @internal
     */
    constructor(checkDiskSpace: CheckDiskSpace);
    /**
     * Checks if the given option has the property the `thresholdPercent` attribute
     *
     * @param {DiskHealthIndicatorOptions} options The options of the `DiskHealthIndicator`
     *
     * @private
     *
     * @returns {boolean} whether given option has the property the `thresholdPercent` attribute
     */
    private isOptionThresholdPercent;
    /**
     * Checks if the size of the given size has exceeded the
     * given threshold
     *
     * @param key The key which will be used for the result object
     *
     * @throws {HealthCheckError} In case the health indicator failed
     * @throws {StorageExceededError} In case the disk storage has exceeded the given threshold
     *
     * @returns {Promise<HealthIndicatorResult>} The result of the health indicator check
     *
     * @example
     * // The used disk storage should not exceed 250 GB
     * diskHealthIndicator.checkStorage('storage', { threshold: 250 * 1024 * 1024 * 1024, path: '/' });
     * @example
     * // The used disk storage should not exceed 50% of the full disk size
     * diskHealthIndicator.checkStorage('storage', { thresholdPercent: 0.5, path: 'C:\\' });
     */
    checkStorage(key: string, options: DiskHealthIndicatorOptions): Promise<HealthIndicatorResult>;
}
export {};