[Support] jest 单独测试service时

[godPaimon]

Describe the problem（描述问题）

import { createApp, close } from '@midwayjs/mock';
import { Framework } from '@midwayjs/web';
import { Application } from 'egg';

describe('test/service/RenderPathService.test.ts', () => {

  let app: Application;

  beforeAll(async () => {
    app = await createApp<Framework>();
  });

  afterAll(async () => {
    await close(app as any);
  });

  test.each([])('test normal resource path', async (path) => {
    expect(1).toBe(1);
  });

});

Midway Versions（Midway 版本）

"dependencies": {
"@aws-sdk/client-s3": "^3.292.0",
"@aws-sdk/s3-request-presigner": "^3.292.0",
"@koa/cors": "^4.0.0",
"@midwayjs/bootstrap": "^3.0.0",
"@midwayjs/core": "^3.0.0",
"@midwayjs/decorator": "^3.0.0",
"@midwayjs/logger": "^3.0.2",
"@midwayjs/web": "^3.0.0",
"ali-oss": "^6.17.1",
"clone": "^2.1.2",
"crypto-js": "^4.1.1",
"egg": "^2.0.0",
"egg-mock": "^1.0.0",
"egg-scripts": "^2.10.0",
"egg-xtransit": "^2.0.0",
"is-type-of": "^1.2.1",
"koa-compress": "^5.1.1",
"netmask": "^2.0.2",
"node-cache": "^5.1.2",
"node-forge": "^1.3.1",
"patch-package": "^6.5.1",
"throttle-debounce": "^5.0.0",
"uuid": "^9.0.1"
},
"devDependencies": {
"@midwayjs/cli": "^1.2.90",
"@midwayjs/egg-ts-helper": "^1.0.1",
"@midwayjs/luckyeye": "^1.0.0",
"@midwayjs/mock": "^3.0.0",
"@types/jest": "^26.0.10",
"@types/node": "14",
"cross-env": "^6.0.0",
"jest": "^26.4.0",
"mwts": "^1.0.5",
"ts-jest": "^26.2.0",
"typescript": "~4.6.0"
},