import { beforeEach, describe, expect, test } from '@jest/globals';
import { JsonRpcEngine } from './JsonRpcEngine';

import { RequestArguments } from './types';


describe('testing basic JsonRpcEngine usage', () => {
  let rpc: JsonRpcEngine<any, any>;
  let _seq = 1;
  const _version = 101;
  beforeEach(() => {
    _seq = 1;
    rpc = JsonRpcEngine.builder<RequestArguments, unknown>()
      .add(async (req, next) => {
        req.id = _seq++;
        req.version = _version;
        return next!(req);
      })
      .add(async (req) => {
        const { method, params, id } = req;
        return { id: id!, version: _version, data: 'pong' };
      })
      .build();
  });

  test('test ping pong', async () => {
    const resp = await rpc.request({ method: 'ping', params: 'test' });
    expect(resp).toEqual({ id: 1, version: _version, data: 'pong' });
  });
});