TypeError：无法使用 JEST 单元测试读取 NodeJS 中未定义的属性“应用”

Question

我是 jest 单元测试以及 NodeJS 的新手，我正在尝试使用以下代码测试我的 API。

const request = require('supertest');
const quick_registration = require('../../../routes/register/quick_registration_of_user')

describe('Quick Registration of users', () => {
    beforeAll(() => {
        con.connect();
    });

    describe("GET / ", () => {
        test("It should respond with an array of students", async () => {
          const response = await request(quick_registration).get("/api/quickregistration");
          expect(response.status).toBe(200);
        });
      });
})

但是测试一直失败并给我一个错误

 FAIL  tests/routes/register/quick_registration_of_user.test.js
  Quick Registration of users
    GET /
      × It should respond with an array of students (20ms)

  ● Quick Registration of users › GET /  › It should respond with an array of students

    TypeError: Cannot read property 'apply' of undefined

      at node_modules/express/lib/router/index.js:635:15
      at next (node_modules/express/lib/router/index.js:260:14)
      at Function.handle (node_modules/express/lib/router/index.js:174:3)
      at Server.router (node_modules/express/lib/router/index.js:47:12)

Test Suites: 1 failed, 1 total
Tests:       1 failed, 1 total
Snapshots:   0 total
Time:        1.649s, estimated 2s
Ran all test suites.
Jest did not exit one second after the test run has completed.

This usually means that there are asynchronous operations that weren't stopped in your tests. Consider running Jest with `--detectOpenHandles` to troubleshoot this issue.

Answer 1

我假设这条线

const quick_registration = require('../../../routes/register/quick_registration_of_user')

需要您定义路由器的文件。您需要改为要求您定义应用程序的文件。