aktasevren / api-testing-w-jest Goto Github PK

You can check example on my repo : https://github.com/aktasevren/filminglocations-API-w-ExpressJS

https://engineering.cimri.com/modern-testing-jest-ve-react-testing-library-part1-e9fe517ac845

https://engineering.cimri.com/modern-testing-jest-ve-react-testing-library-part-2-4e687f20f1c0

• package.json { "scripts": { "test":"jest" } }

• default => ** tests** , .spec.js , .test.js

https://jestjs.io/docs/expect#methods

• toBe(booelan, number, string) , toEqual(array, object) , toBeTruthy , toBeFalsy , not.toEqual() , toContain() , toThrow(function) , toMatch , toBeGreaterThan , toBeUndefined , toHaveProperty

• jest -t keyword =>

• jest --watch working with git

• jest --coverage

• mock

  import axiosMock from "axios";
  
  async function getUsers(){
      try{
          const response = await axiosMock.get("/users");
          return response.data.users;
      } catch(e){
          throw new Error("wrong")
      }
  }
  
  jest.mock("axios")
  
  const fakeUsers = ["Evren","Ahmet","Blabla"]
  
  axiosMock.get.mockResolvedValue({ data : {users:fakeUsers}});
  
  test("gets the users" , async() =>{
      const users = await getUsers();
      expect(users).toEqual(fakeUsers)
  } )
  
  
  

  Not: Async await yapısını kullanmak için test fonksiyonunuzu async yapmanız gerekir.

  • configuration https://jestjs.io/docs/configuration