设置一个 属性 的 Map 后的困惑

Question

我正在阅读和练习教程：http://teropa.info/blog/2015/09/10/full-stack-redux-tutorial.html 但是我无法通过 reducer 测试。然后我又做了一个新的测试来找出原因。

这是test.js（加柴的摩卡咖啡）：

import {expect} from 'chai';
import {List, Map, fromJS} from 'immutable';

describe('set', () => {
  it('sets map\'s property', () => {
    const state = Map();
    const action = {type: 'SET_ENTRIES', entries: ['Trainspotting']};
    const nextState = state.set('entries', action.entries);

    /*
    expect(nextState).to.equal(Map({
      entries: ['Trainspotting']
    }));
    */
    expect(nextState).to.equal(fromJS({
      entries: ['Trainspotting']
    }));
  });
});

要么用Map，要么用fromJS，测试都不通过

如果选择"Map"，则显示：

  AssertionError: expected 'Map { "entries": Trainspotting }' to equal 'Map { "entries": Trainspotting }'
  + expected - actual

如果选择"fromJS"，则显示：

  AssertionError: expected 'Map { "entries": Trainspotting }' to equal 'Map { "entries": List [ "Trainspotting" ] }'
  + expected - actual

  -Map { "entries": Trainspotting }
  +Map { "entries": List [ "Trainspotting" ] }

真让人费解。如何让它发挥作用？

Answer 1

你尝试了吗

const nextState = state.set('entries', List(action.entries));