/**
 * The renderer a test's document is painted by, chosen by the page it came from,
 * and the timezone that page opens in when the suite declares none.
 *
 * A page's scripts format its dates and numbers in the timezone and locale the
 * page runs in, and the renderer runs those scripts again, so the two must
 * agree. Playwright sets them per test — `test.use({ timezoneId })` in one
 * describe block is how a suite pins the one page that formats dates — and a
 * worker fixture cannot read a test's options. So the page is asked, through
 * {@link regionOf}, the same question the acquisition asks for its environment
 * key: one owner for both answers.
 *
 * Renderers are still one per worker per region, never one per test: a launch
 * and first navigation cost two orders of magnitude more than a warm render
 * (journal 0007), and nearly every suite runs in one region.
 *
 * A suite that declares no `timezoneId` gets `UTC`, not the host's. Playwright
 * Test opens a context in the host's timezone when nothing sets one, so a page
 * read on a laptop in Sydney and one read on a CI runner in UTC would carry
 * different keys, and every change would name the timezone. Its `locale` needs no pin: Playwright
 * Test already defaults it to `en-US`, the default the collectors pin.
 */
import type { Fixtures, PlaywrightTestArgs, PlaywrightTestOptions, PlaywrightWorkerArgs } from '@playwright/test';
import type { PageRegion } from '@variance-authority/core/format';
import type { Renderer } from '@variance-authority/raster';
/** Renderers a worker holds, one for each timezone and locale its pages ran in. */
export interface RendererPool {
    /** The renderer that paints in `region`, launched the first time it is asked for. */
    readonly for: (region: Required<PageRegion>) => Promise<Renderer>;
}
export interface VarianceRendererFixtures {
    /** The renderer this test's page is painted by: the one for the timezone and locale the page runs in. */
    readonly varianceRenderer: Renderer;
}
export interface VarianceRendererWorkerFixtures {
    /** The worker's renderers, closed when the worker is. */
    readonly varianceRenderers: RendererPool;
}
export declare const varianceRendererFixtures: Fixtures<VarianceRendererFixtures, VarianceRendererWorkerFixtures, PlaywrightTestArgs & PlaywrightTestOptions, PlaywrightWorkerArgs>;
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