declare global {
    interface Window {
        __HYDRATION_WARNINGS__: string[];
    }
}
export declare function setupHydrationWarningCapture(): void;
/**
 * Tests that a component hydrates without warnings.
 * Takes tag name and props, generates both SSR HTML and React element from them.
 */
export declare function testHydration(tagName: string, props?: Record<string, unknown>): Promise<string[]>;
/**
 * Tests hydration for parent/child component structures.
 * Takes parent tag, props, and children HTML string.
 *
 * This properly includes children in the React tree so that React can detect
 * hydration mismatches when components modify their light DOM children
 * (e.g., adding classes, moving children to shadow DOM).
 */
export declare function testHydrationWithChildren(tagName: string, props: Record<string, unknown>, childrenHtml: string): Promise<string[]>;