recreating-redux-3-test.js

describe('#dispatch', () => {
  const reducer = (state = [ 'hello world' ], action) => {
    switch(action.type) {
      case 'ADD_NOTE':
        return [ ...state, action.payload ];
      default:
        return state;
    }
  };

  const addNote = payload => ({ type: 'ADD_NOTE', payload });

  it('should update the state with the result of the reducer', () => {
    const store = createStore(reducer);

    store.dispatch(addNote('hello'));

    expect(store.getState()).to.deep.equal([ 'hello world', 'hello' ]);
  });
});