Purpose

• Integration test
• Test Store's state

Steps

Create store with reducers and initial state

const store = createStore(rootReducer, initialState);

Create actions

 const course = {title: 'Clean code'};
 const action = courseActions.createCourseSuccess(course);

Dispatch actions

store.dispatch(action);

Assert output state

• getState(): get state from Store

    const actual = store.getState().courses[0];
    expect(actual).toEqual(course);