我可以使用jest.fn()相关的检查和axios模拟适配器吗？

Question

我正在使用axios-mock-adapter，我想知道是否可以设置它，以便也可以像expect(MockAdapter.get).toHaveBeenCalledWith(url);这样的断言

我试过以下几种方法：

// test
import MockAdapter from "axios-mock-adapter";
import { fetchProducts } from "../src/redux/actions/productActions";

describe("fetchProducts", () => {
  const mock = new MockAdapter();
  it("fetches the products", async () => {
    const x = await fetchProducts();
    expect(mock.get).toHaveBeenCalledWith("https://www.whatever.com");
  });
});

// function
import axios from "axios";

export async function* fetchProducts() {
  let data = await axios.get("https://www.whatever.com");
  return data;
}

上面写着

    expect(jest.fn())[.not].toHaveBeenCalledWith()

    Matcher error: received value must be a mock or spy function

    Received has value: undefined

如果我添加了一个./__mocks__/axios.js文件，我就会立即得到

    TypeError: axios.create is not a function

    > 1 | import MockAdapter from "axios-mock-adapter";
        | ^
      2 | import { fetchProducts } from "../src/redux/actions/productActions";

是否有办法做到这一点，或者是模仿我自己的axios函数实现，还是使用axios-mock-adapter而不访问它作为一个jest模拟函数？

Answer 1

你需要创建一个这样的间谍：

const spy = jest.spyOn(mock, 'onGet');

mock.onGet('https://www.whatever.com').reply(200);

// only if mock client has been called with https://www.whatever.com the test will pass
expect(spy).toHaveBeenCalled();