import { SimpleReadableStream } from "./types/simple-readable-stream";
/**
 * TextStreamSearch finds occurrences of a given text or regular expression in a given text stream.
 */
export declare class TextStreamSearch {
    /** the output captured so far */
    private streamText;
    /**
     * Subscriptions contains all the requests from users of this library
     * to be notified when a particular text or regex shows up in the text stream.
     */
    private searchList;
    constructor(stream: SimpleReadableStream);
    /**
     * Returns a promise that resolves with the matching text
     * when the given text shows up in the observed stream.
     * If a timeout is given, aborts after the given duration.
     */
    waitForText(text: string, timeout?: number): Promise<string>;
    /**
     * Returns a promise that resolves with the matching text
     * when the given RegExp shows up in observed stream.
     * If a timeout is given, aborts after the given duration.
     */
    waitForRegex(regex: RegExp, timeout?: number): Promise<string>;
    /** OnStreamData is called when new text arrives on the input stream. */
    private onStreamData;
}