[英]Jest mocking: TypeError: axios.get.mockResolvedValue is not a function
[英]TypeError: moduleName.startsWith is not a function when mocking "axios"
I'm trying to mock an axios get function but I'm getting TypeError: moduleName.startsWith is not a function
when mocking "axios" What would be the right way to mock it?
错误:
FAIL src/tests/Sample.test.jsx
● Test suite failed to run
TypeError: moduleName.startsWith is not a function
5 | import { backendUrl } from "../helper/constants"
6 | describe("test useEffect and axios", () => {
> 7 | const mockGet = jest.mock(axios.get)
示例.test.jsx
import { mount } from "enzyme"
import { screen, render, act } from "@testing-library/react"
import Sample from "../pages/Sample"
import axios from "axios"
import { backendUrl } from "../helper/constants"
describe("test useEffect and axios", () => {
const mockGet = jest.mock(axios.get) // THROWS ERROR HERE
let wrapper
it("should call axios", async () => {
await act(async () => {
mockGet.mockImplementationOnce(() => Promise.resolve({}))
wrapper = mount(<Sample />)
})
wrapper.update()
await expect(mockGet).toHaveBeenCalledWith(backendUrl)
})
})
示例.jsx
import axios from "axios"
import { useState, useEffect } from "react"
import { backendUrl } from "../helper/constants"
const Sample = () =>{
const [pets, setPets] = useState([])
useEffect(() => axios.get(backendUrl)
.then(({data}) =>setPets(data.entries))
.catch((err)=>console.log(err)), [])
return (
<>
<p>I h8 all of you</p>
{pets.map((e, i) =><h2 key={i}>{e.Link}</h2>)}
</>
)
}
export default Sample
您必须使用正确的语法,例如jest.mock('axios')
所以在您的情况下:
jest.mock('axios')
describe("test useEffect and axios", () => {
const mockGet = jest.fn()
let wrapper
it("should call axios", async () => {
await act(async () => {
mockGet.mockImplementationOnce(() => Promise.resolve({}))
wrapper = mount(<Sample />)
})
wrapper.update()
await expect(mockGet).toHaveBeenCalledWith(backendUrl)
})
})
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