/**
 * @license
 * Copyright 2022 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
import type { TemplateResult } from 'lit';
import type { FixtureOptions, SsrFixtureOptions } from './fixture-options.js';
declare global {
    interface Element {
        setHTMLUnsafe(html: string): void;
    }
}
/**
 * Renders the provided Lit template server-side by executing a custom command
 * for Web Test Runner provided by the Lit SSR Plugin, loads it to the document
 * and (optionally) hydrates it, returning the element.
 *
 * This module **must** be imported before any custom element definitions.
 */
export declare function ssrFixture<T extends HTMLElement>(template: TemplateResult, { modules, base, hydrate }: SsrFixtureOptions): Promise<T>;
/**
 * Renders the provided Lit template server-side by executing a custom command
 * for Web Test Runner provided by the Lit SSR Plugin, loads it to the document
 * and hydrates it, returning the element.
 *
 * This module **must** be imported before any custom element definitions.
 */
export declare function ssrHydratedFixture<T extends HTMLElement>(template: TemplateResult, { modules, base }: FixtureOptions): Promise<T>;
/**
 * Renders the provided Lit template server-side by executing a custom command
 * for Web Test Runner provided by the Lit SSR Plugin, loads it to the document
 * **without** hydrating it, returning the element.
 *
 * This module **must** be imported before any custom element definitions.
 */
export declare function ssrNonHydratedFixture<T extends HTMLElement>(template: TemplateResult, { modules, base }: FixtureOptions): Promise<T>;
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