期望库 TypeError: expect(...).toInclude 不是一个函数

Question

I'm guessing it's an import error somehow, but I can't seem to figure out how, expect is up to date and I can't get it too run without it saying

libarary TypeError: expect(...).toInclude is not a function

var request = require("supertest");
var {app} = require("./../server.js");
var {Show} = require("./../models/show");
var expect = require('expect');

    describe("GET /show/:id", () => {
        it("Should include the show name 'Arrow' in the body", (done) => {
            request(app)
            .get(`/show/${showName}`)
            .expect(200)
            .expect((res) => {
                expect('hello world').toInclude('world')

            })
            .end(done);
        });
    })

});

Answer 1

UPDATE : besides .toMatchObject , you can also use .toHaveProperty

---

For anyone who used .toInclude to check if an object contains certain fields, the new version is .toMatchObject .

Here is the document reference

Answer 2

The expect library was recently made part of the Jest project - the Jest team changed the API a little, as this answer explains.

The full documentation for expect can now be found here: https://facebook.github.io/jest/docs/en/expect.html

Answer 3

If you are facing similar problem than it can be solved by importing jest-dom in your test file: import '@testing-library/jest-dom' in your xyz.test.js

Don't forget to install jest-dom in order to use it with jest:

npm i --save-dev @testing-library/jest-dom

Hope it helps.. :)