import { TestEvent, Experiments, ITest } from "../typings";
/**
 * A test is a collection of experiments.
 */
export declare class Test implements ITest {
    protected storageKey: string;
    protected experiments: Experiments;
    /**
     * Hooks up the experiment.
     */
    constructor(storageKey?: string);
    /**
     * Sets an experiment.
     * @param id
     * @param value
     */
    set<T>(id: string, value: T): void;
    /**
     * Returns whether an experiment with the id exists.
     * @param id
     */
    has(id: string): boolean;
    /**
     * Returns an experiment with a given id.
     * @param id
     */
    get<T>(id: string): T;
    /**
     * Returns all experiments.
     */
    getAll(): Experiments;
    /**
     * Removes an experiment with a given id.
     * @param id
     */
    remove(id: string): void;
    /**
     * Removes all experiments.
     */
    removeAll(): void;
    /**
     * Sets an array of experiments.
     * @param tests
     */
    setAll(tests: Experiments): void;
    /**
     * Returns a random variation.
     * @param variations
     */
    getVariation<T>(variations: T[]): T;
    /**
     * Saves experiments to local storage.
     */
    save(): void;
    /**
     * Loads experiments from local storage.
     */
    load(): void;
    /**
     * Adds event listener.
     * @param type
     * @param listener
     * @param options
     */
    addEventListener(type: TestEvent, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
    /**
     * Removes event listener.
     * @param type
     * @param listener
     * @param options
     */
    removeEventListener(type: TestEvent, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
    /**
     * Dispatches an update event.
     */
    protected didUpdate(): void;
}
/**
 * Singleton pattern for the global experiment.
 */
export declare let test: ITest;
/**
 * Sets the global experiment.
 * @param _test
 */
export declare const setTest: (_test: ITest) => void;
/**
 * Returns the global experiment.
 */
export declare const getTest: () => ITest;