/**
 * Resize the browser and **wait until the page agrees**.
 *
 * `page.viewport()` resolves when the driver has asked for the
 * resize, not when the tester frame has been laid out at the new
 * size. On the first resize in a file that gap is real: the
 * assertion runs against the *previous* width, so a
 * horizontal-scroll test at 390px silently measures a 1440px page
 * and reports a number nobody can explain. It is a race, so it
 * fails intermittently — which is the worst possible property for
 * the one gate that says the shell does not scroll sideways.
 *
 * Polling `innerWidth`/`innerHeight` is the honest wait: they are the
 * same numbers the media queries and the layout resolved against, so
 * when they match, the thing under test really is at the size the
 * test claims.
 *
 * **Height counts too**, and it did not used to. A panel row's size
 * steps down under `(height <= 40rem)` (`usePanelItemSize`), so a test
 * that shrinks only the height would have raced the resize with
 * nothing to wait on and measured the tall rows about half the time.
 */
export declare const setViewport: ({ height, width, }: {
    height: number;
    width: number;
}) => Promise<void>;
/** A phone in portrait — the width plex-channels scrolls at. */
export declare const PHONE: {
    height: number;
    width: number;
};
export declare const DESKTOP: {
    height: number;
    width: number;
};
/**
 * A window short enough to trip `usePanelItemSize`'s first step-down
 * (`height <= 40rem`, so 640px) and wide enough that nothing else
 * about the layout changes with it.
 */
export declare const SHORT_WINDOW: {
    height: number;
    width: number;
};
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