/**
 * Read testing utilities for Modbus registers
 */
import type { Transport } from '@ya-modbus/driver-types';
import { ErrorType } from './error-classifier.js';
/**
 * Modbus register type
 */
export declare enum RegisterType {
    /** Holding registers (FC03) */
    Holding = "holding",
    /** Input registers (FC04) */
    Input = "input"
}
/**
 * Result of a register read test
 */
export interface ReadTestResult {
    /** Whether the read was successful */
    success: boolean;
    /** Register data if successful */
    data?: Buffer;
    /** Time taken for the read operation in milliseconds */
    timing: number;
    /** Error message if failed */
    error?: string;
    /** Classified error type if failed */
    errorType?: ErrorType;
}
/**
 * Test reading a register with timing measurement
 *
 * @param transport - Modbus transport
 * @param type - Register type (holding or input)
 * @param address - Starting register address
 * @param count - Number of registers to read
 * @returns Read test result with timing information
 */
export declare function testRead(transport: Transport, type: RegisterType, address: number, count: number): Promise<ReadTestResult>;
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