import type { ApiResponse } from "../openapi-driver.ts";
/** Fluent, synchronous assertions over an already-resolved HTTP response's
 *  status, JSON body, and headers. Each matcher returns the same object so calls
 *  chain. */
export interface ResponseAssert<T> {
    /** Assert the response status equals `code`. */
    hasStatus(code: number): ResponseAssert<T>;
    /** Assert the parsed JSON body deep-matches `subset` (a SUBSET match — extra
     *  keys on the body are ignored). */
    hasJson(subset: unknown): ResponseAssert<T>;
    /** Assert a header is present (case-insensitive name) and, when `value` is
     *  given, that it equals `value`. */
    hasHeader(name: string, value?: string): ResponseAssert<T>;
}
/** Assert over an already-resolved {@link ApiResponse} (synchronous). */
export declare function assertThatResponse<T>(res: ApiResponse<T>): ResponseAssert<T>;