我有以下服务器类:
import express, { Request, Response } from 'express';
export default class Server {
server: any;
exp: any;
constructor() {
this.exp = express();
this.exp.get('/', (_req: Request, res: Response) => {
res.json('works');
});
}
start(): void {
this.server = this.exp.listen(3000);
}
stop(): void {
this.server.close();
}
}
我正在使用supertest进行端到端测试。我希望在所有测试之前启动我的应用程序,并在测试完成后停止它。
使用beforAll和afterAll可以很容易地做到这一点,在这里我只需实例化Server类并调用start和close方法。
但是,由于我要测试10个以上的控制器,因此我想避免在每个测试文件期间启动和停止服务器。
我在文档中找到了 setupFiles 和 setupFilesAfterEnv ,但是由于实例没有在两个文件中“共享”,所以我无法停止服务器。
这是1个测试文件的示例:
import supertest from 'supertest';
describe('Album Test', () => {
let app: App;
beforeAll(async (done) => {
app = new App();
await app.setUp(); // database connection (not mentionned in the preivous example)
done();
});
afterAll(async (done) => {
await app.close();
app.server.stop();
done();
});
const api = supertest('http://localhost:3000');
it('Hello API Request', async () => {
const result = await api.get('/v1/user');
expect(result.status).toEqual(200);
...
});
});
这完全正常,但是我在每个测试文件中都复制了beforeAll和afterAll方法。有没有办法只声明一次?
谢谢
答案 0 :(得分:1)
您可以使用setupFiles全局设置测试装置。您可以将要在多个测试文件中使用的变量分配给Node.js global对象。
例如
app.ts
:
import express, { Request, Response } from 'express';
export default class Server {
server: any;
exp: any;
constructor() {
this.exp = express();
this.exp.get('/', (_req: Request, res: Response) => {
res.json('works');
});
}
start(): void {
this.server = this.exp.listen(3000);
}
stop(): void {
this.server.close();
}
}
app.setup.js
:
const App = require('./app').default;
beforeAll(() => {
global.app = new App();
global.app.exp.set('test setup', 1);
console.log('app setup');
});
afterAll(() => {
console.log('app stop');
});
jest.config.js
:
module.exports = {
preset: 'ts-jest/presets/js-with-ts',
testEnvironment: 'node',
setupFilesAfterEnv: [
'./jest.setup.js',
'/Users/ldu020/workspace/github.com/mrdulin/react-apollo-graphql-starter-kit/stackoverflow/61659975/app.setup.js',
],
testMatch: ['**/?(*.)+(spec|test).[jt]s?(x)'],
verbose: true,
};
a.controller.test.js
:
describe('controller a', () => {
it('should pass', () => {
console.log('test setup:', global.app.exp.get('test setup'));
expect(1 + 1).toBe(2);
});
});
b.controller.test.js
:
describe('controller b', () => {
it('should pass', () => {
console.log('test setup:', global.app.exp.get('test setup'));
expect(1 + 1).toBe(2);
});
});
单元测试结果:
PASS stackoverflow/61659975/a.controller.test.js
controller a
✓ should pass (5ms)
console.log
app setup
at Object.<anonymous> (stackoverflow/61659975/app.setup.js:6:11)
console.log
app setup
at Object.<anonymous> (stackoverflow/61659975/app.setup.js:6:11)
console.log
test setup: 1
at Object.<anonymous> (stackoverflow/61659975/b.controller.test.js:3:13)
console.log
test setup: 1
at Object.<anonymous> (stackoverflow/61659975/a.controller.test.js:3:13)
console.log
app stop
at Object.<anonymous> (stackoverflow/61659975/app.setup.js:10:11)
console.log
app stop
at Object.<anonymous> (stackoverflow/61659975/app.setup.js:10:11)
PASS stackoverflow/61659975/b.controller.test.js
controller b
✓ should pass (3ms)
Test Suites: 2 passed, 2 total
Tests: 2 passed, 2 total
Snapshots: 0 total
Time: 6.749s, estimated 12s