create-new-user.spec.js AFTER

import createNewUserUseCase  from '../create-new-user.usecase';
import User from "../../../models/User";
import "regenerator-runtime/runtime.js";
jest.mock("../../../models/User");


describe("Create new user usecase test", () => {
    const resMock = {
        status: jest.fn(() => resMock),
        send: jest.fn(() => resMock)
    };
    const reqMock = {
        body: {
            name: "name",
            email: "email",
            role: "role",
            password: "123456",
            password_confirmation: "123456"
        }
    }

    it(`It should:
    - Call findOne method to verify if a user user with the same email already exists
    - Call the constructor of the User model with the right parameters
    - Call the User prototype save method `, async () => {

        await createNewUserUseCase(reqMock, resMock);

        expect(User.findOne).toHaveBeenCalledTimes(1);

        expect(User).toHaveBeenCalledTimes(1);
        expect(User.mock.calls[0][0].name).toBe('name');
        expect(User.mock.calls[0][0].email).toBe('email');
        expect(User.mock.calls[0][0].role).toBe('role');
        expect(User.mock.calls[0][0].created_at).toBeInstanceOf(Date);
        expect(User.prototype.save).toHaveBeenCalledTimes(1);

        expect(resMock.status).toHaveBeenCalledTimes(1);
        expect(resMock.status.mock.calls[0][0]).toBe(201);
        expect(resMock.send).toHaveBeenCalledTimes(1);
    });

    it(`It should:
    - Fail to save the user
    - Response obj send error responses`, async () => {
        User.prototype.save.mockImplementationOnce(() => Promise.reject('Fail to save the user'));

        await createNewUserUseCase(reqMock, resMock);

        expect(resMock.status).toHaveBeenCalledTimes(2);
        expect(resMock.status.mock.calls[1][0]).toBe(500);
        expect(resMock.send).toHaveBeenCalledTimes(2);
        expect(resMock.send.mock.calls[1][0]).toStrictEqual({error: "Houve um erro interno."});
    })
});