import type { HandlerContext } from "../../types.js";
import type { ResponseBuilder } from "../../../../security/index.js";
import type { CacheRepository } from "../../../../repositories/types.js";
import { type DependencyPinningSnapshot } from "../../../../transforms/esm/package-registry.js";
type ComponentLoaderModule = typeof import("../../../../modules/react-loader/component-loader.js");
type ComponentSourceLoader = ComponentLoaderModule["loadComponentFromSource"];
interface ErrorPageOptions {
    statusCode: number;
    error?: Error;
    pathname?: string;
}
/**
 * Inject a CacheRepository for testing.
 * Call with null to restore default Map-based caching.
 */
export declare function __injectCacheForTests(cacheRepo: CacheRepository<string> | null): void;
export declare function __setComponentSourceLoaderForTests(loader: ComponentSourceLoader | null): void;
export declare function tryErrorPageFallback(req: Request, ctx: HandlerContext, builder: ResponseBuilder, options: ErrorPageOptions, requestedDependencySnapshot?: DependencyPinningSnapshot): Promise<Response | null>;
export {};
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