HRCenter/src/__tests__/ReduxTests/registerSagaTest.test.js

import * as redux from "react-redux";
import store from "../../store";
import { Router } from "react-router-dom";
import history from "../../store/utils/history";
import { mockState } from "../../mockState";
import * as api from '../../request/registerRequest'
import { render } from "@testing-library/react";
import UserDetails from "../../pages/UsersPage/UserDetails";
import ColorModeProvider from "../../context/ColorModeContext";
import {
  USER_DETAILS_REQ,
} from "../../store/actions/users/usersActionConstants";
import { registerSuccess } from "../../store/actions/register/registerActions";
import { runSaga } from "redux-saga";
import { userDetails } from "../../store/saga/usersSaga";
import { registerUser } from "../../store/saga/registerSaga";

describe("UserDetails reducer tests", () => {
    let spyOnUseSelector;
  let spyOnUseDispatch;
  let mockDispatch;

  beforeEach(() => {
    // Mock useSelector hook
    spyOnUseSelector = jest.spyOn(redux, "useSelector");
    spyOnUseSelector.mockReturnValueOnce(mockState.user.user);

    // Mock useDispatch hook
    spyOnUseDispatch = jest.spyOn(redux, "useDispatch");

    // Mock dispatch function returned from useDispatch
    mockDispatch = jest.fn();
    spyOnUseDispatch.mockReturnValue(mockDispatch);
  });

  afterEach(() => {
    jest.restoreAllMocks();
  });

  it("should run register saga function with actions", async () => {
    const dispatchedActions = [];

    api.register = jest.fn(() => Promise.resolve());

    const fakeStore = {
      getState: () => ({
        isSuccess: false,
        errorMessage: "",
      }),
      dispatch: (action) => dispatchedActions.push(action),
    };

    await runSaga(fakeStore, registerUser, {
      payload: {
        password:'',
        email:'',
        confirm:'',
        position:'',
        linkedIn:'',
        phone:'',
        token:'',
      },
    }).done;

    expect(api.register.mock.calls.length).toBe(1);
    expect(dispatchedActions).toContainEqual(registerSuccess());
  });
});