/**
 * Response assertion helpers for API testing
 *
 * Provides utilities for asserting HTTP response status and body.
 *
 * @example
 * ```typescript
 * const response = await app.request('/api/presets');
 *
 * // Assert status and get typed body
 * const body = await assertJsonResponse<{ presets: Preset[] }>(response, 200);
 * expect(body.presets).toHaveLength(1);
 *
 * // Assert error response
 * const error = await assertErrorResponse(response, 400);
 * expect(error.error).toBe('Validation failed');
 * ```
 */
/**
 * Assert response has expected status and return JSON body
 *
 * @param response - The Response object
 * @param expectedStatus - Expected HTTP status code
 * @returns The parsed JSON body
 * @throws If status doesn't match
 */
export declare function assertJsonResponse<T>(response: Response, expectedStatus: number): Promise<T>;
/**
 * Error response shape
 */
export interface ErrorResponse {
    error: string;
    code?: string;
    details?: Record<string, unknown>;
}
/**
 * Assert response is an error with expected status
 *
 * @param response - The Response object
 * @param expectedStatus - Expected HTTP status code
 * @returns The parsed error body
 * @throws If status doesn't match
 */
export declare function assertErrorResponse(response: Response, expectedStatus: number): Promise<ErrorResponse>;
/**
 * Assert response is OK (2xx status)
 *
 * @param response - The Response object
 * @returns The parsed JSON body
 * @throws If status is not 2xx
 */
export declare function assertOkResponse<T>(response: Response): Promise<T>;
/**
 * Assert response is a redirect
 *
 * @param response - The Response object
 * @param expectedLocation - Optional expected Location header value
 * @returns The Location header value
 * @throws If not a redirect or location doesn't match
 */
export declare function assertRedirectResponse(response: Response, expectedLocation?: string): string;
/**
 * Assert response has specific headers
 *
 * @param response - The Response object
 * @param expectedHeaders - Headers to check
 * @throws If any header is missing or doesn't match
 */
export declare function assertHeaders(response: Response, expectedHeaders: Record<string, string>): void;
/**
 * Assert response has CORS headers
 *
 * @param response - The Response object
 * @param origin - Expected allowed origin
 */
export declare function assertCorsHeaders(response: Response, origin?: string): void;
/**
 * Assert response is JSON content type
 *
 * @param response - The Response object
 * @throws If Content-Type is not application/json
 */
export declare function assertJsonContentType(response: Response): void;
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