試圖爲我的redux reducer爲購物車創建一個單元測試。這是減速,該項目被添加到項目屬性:如何獲得減速機單元測試工作?
const initialState = {
items: [],
cartOpen: false,
newMonthlyCost: 0,
currentMonthlyCost: 0,
showNextButton: false,
orderConfirmed: false
}
const Cart = (state = initialState, action) => {
switch (action.type) {
case 'ADD_TO_CART':
return Object.assign({}, state,
{
items: [...state.items,action.data]
});
default:
return state
}
}
export default Cart
我釵單元測試是這樣的:
import reducer from './../../foss-frontend/app/reducers/cart.js'
import {expect} from 'chai';
describe('cart reducer',() => {
it('should handle ADD_TO_CART',() => {
expect(
reducer([], {
type: 'ADD_TO_CART',
data: {
id: 12, price: 2332
}
})
).to.deep.equal({items: [{id: 124, price: 2332}]})
})
})
爲什麼會出現這種錯誤,以及如何解決這一問題?
錯誤:
TypeError: Cannot convert undefined or null to object
at Function.from (native)
at _toConsumableArray (app\reducers\cart.js:7:182)
您的代碼看起來確定。我想錯誤是在你沒有發佈的部分。你能發佈減速器和測試的所有代碼嗎? –
嗨Artem見上面 –
'.to.deep.equal({items:{id:124,price:2332}})'應該是'.to.deep.equal({items:[{id:124,price: 2332}]})' –