NodeJS中的Jest + Supertest，异步/等待

Question

我尝试用Jest测试我的api。 我想要更多的抽象，所以我创建了这个函数：

 const tokensConfig = config.get('test.tokens'); function testIt(method = 'get', url = '/', statuses = [], body = {}) { const testNames = ['unauthorized', 'user', 'admin']; const tokens = [null, tokensConfig.user, tokensConfig.admin]; for (let i = 0; i < testNames.length; i++) { test(testNames[i], async () => { const response = await request(app) [method](url) .set('Accept', 'application/json') .set('Authorization', tokens[i]) .send(body); expect(response.statusCode).toBe(statuses[i]); }); } } 

在test.js文件中，我运行：

 const config = require('config'); const request = require('supertest'); const testIt = require('./testIt'); const app = require('../app'); // It's work describe('get user by email', () => { testIt('get', '/users/get-by-email/user@test', [401, 403, 200]); }); // It's not work describe('delete user', async () => { const userByEmail = await request(app) .get('/users/get-by-email/user@test') .set('Accept', 'application/json') .set('Authorization', config.get('test.tokens.admin')); testIt('delete', `/users/${userByEmail._id}`, [401, 403, 200]); }); 

异步/等待中的问题-testIt在请求用户之前运行。

如果我移动测试（或它）以描述功能testIt的块并在测试内部创建请求用户，它将起作用。 但是我想要更多的抽象（许多测试中的测试块很大）

如何解决？

Answer 1

看起来你需要让笑话知道，想到的是异步方法，以resolves 。

这是Jest文档中的示例代码：

// async/await can be used.
it('works with async/await', async () => {
  expect.assertions(1);
  const data = await user.getUserName(4);
  expect(data).toEqual('Mark');
});

// async/await can also be used with `.resolves`.
it('works with async/await and resolves', async () => {
  expect.assertions(1);
  await expect(user.getUserName(5)).resolves.toEqual('Paul');
});

https://facebook.github.io/jest/docs/en/tutorial-async.html#async-await

Answer 2

结果，我不得不将测试移至test.js：

 // test.js it('delete user', async () => { const userByEmail = await request(app) .get('/users/get-by-email/user@test') .set('Accept', 'application/json') .set('Authorization', config.get('test.tokens.admin')); const result = await testIt('delete', `/users/${userByEmail.body._id}`); expect(result).toEqual([401, 403, 401, 200]); }); 

 // testIt.js const config = require('config'); const request = require('supertest'); const app = require('../app'); const tokensConfig = config.get('test.tokens'); async function testIt(method = 'get', url = '/', body = {}) { const testNames = ['unauthorized', 'user', 'adminTokenExpired', 'admin']; const tokens = [null, tokensConfig.userTokenInfinity, tokensConfig.adminTokenExpired, tokensConfig.adminTokenInfinity]; let result = []; for (let i = 0; i < testNames.length; i++) { const response = await request(app) [method](url) .set('Accept', 'application/json') .set('Authorization', tokens[i]) .send(body); result.push(response.statusCode); } return result; } module.exports = testIt; 

但是我不得不将自己局限于所有角色的一个答案，而不是每个角色的单个答案，因为我想要更少的代码。