Simple Saga Test

simple-saga-test.js

import { call, put } from 'redux-saga/effects';

import { API_BUTTON_CLICK_SUCCESS, } from './actions/consts';
import { getDataFromAPI } from './api';

it('apiSideEffect - fetches data from API and dispatches a success action', () => {
  const generator = apiSideEffect();

  expect(generator.next().value)
    .toEqual(call(getDataFromAPI));

  expect(generator.next().value)
    .toEqual(put({ type: API_BUTTON_CLICK_SUCCESS }));

  expect(generator.next())
    .toEqual({ done: true, value: undefined });
});