/// <reference types="node" />
/**
 * A way to read and write screenshots.
 *
 * It's up to the implementation to decide where and how to
 * write the screenshots. All the methods receive the name of
 * the screenshot which is the same value as the name passed
 * in {@link check|Mugshot.check}.
 */
export interface ScreenshotStorage {
    /**
     * Return the screenshot for `name` as a PNG encoded buffer.
     *
     * @param name The value passed to {@link check|Mugshot.check}.
     */
    read: (name: string) => Promise<Buffer>;
    /**
     * Check whether a screenshot exists for `name`.
     *
     * @param name The value passed to {@link check|Mugshot.check}.
     */
    exists: (name: string) => Promise<boolean>;
    /**
     * Write a screenshot for `name`.
     *
     * @param name The value passed to {@link check|Mugshot.check}.
     * @param data PNG encoded Buffer.
     */
    write: (name: string, data: Buffer) => Promise<void>;
    /**
     * Delete the screenshot for `name`.
     *
     * If the screenshot doesn't exist, this should be a no-op.
     *
     * @param name The value passed to {@link check|Mugshot.check}.
     */
    delete: (name: string) => Promise<void>;
}