尝试使用此示例测试我的异步操作创建者:http://redux.js.org/docs/recipes/WritingTests.html#async-action-creators我认为我做的一切都相同,但我遇到了错误:
async actions › creates FETCH_BALANCE_SUCCEESS when fetching balance has been done
TypeError: store.dispatch(...).then is not a function
不要理解为什么会这样,因为我从一步一步的例子中做了所有事情。
我也发现了这个例子http://arnaudbenard.com/redux-mock-store/,但无论如何,错误存在于某处,不幸的是,我无法找到它。我的错误在哪里,即使我的测试用例与示例相同,为什么我也会出错?
我的测试用例:
import nock from 'nock';
import configureMockStore from 'redux-mock-store';
import thunk from 'redux-thunk';
import * as actions from './';
import * as types from '../constants';
const middlewares = [thunk];
const mockStore = configureMockStore(middlewares);
describe('async actions', () => {
afterEach(() => {
nock.cleanAll();
});
it('creates FETCH_BALANCE_SUCCEESS when fetching balance has been done', () => {
const store = mockStore({});
const balance = {};
nock('http://localhost:8080')
.get('/api/getbalance')
.reply(200, { body: { balance } });
const expectedActions = [
{ type: types.FETCH_BALANCE_REQUEST },
{ type: types.FETCH_BALANCE_SUCCEESS, body: { balance } },
];
return store.dispatch(actions.fetchBalanceRequest()).then(() => {
// return of async actions
expect(store.getActions()).toEqual(expectedActions);
});
});
});
我正在尝试测试我的行为。
import 'whatwg-fetch';
import * as actions from './actions';
import * as types from '../constants';
export const fetchBalanceRequest = () => ({
type: types.FETCH_BALANCE_REQUEST,
});
export const fetchBalanceSucceess = balance => ({
type: types.FETCH_BALANCE_SUCCEESS,
balance,
});
export const fetchBalanceFail = error => ({
type: types.FETCH_BALANCE_FAIL,
error,
});
const API_ROOT = 'http://localhost:8080';
const callApi = url =>
fetch(url).then(response => {
if (!response.ok) {
return Promise.reject(response.statusText);
}
return response.json();
});
export const fetchBalance = () => {
return dispatch => {
dispatch(actions.fetchBalanceRequest());
return callApi(`${API_ROOT}/api/getbalance`)
.then(json => dispatch(actions.fetchBalanceSucceess(json)))
.catch(error =>
dispatch(actions.fetchBalanceFail(error.message || error))
);
};
};
答案 0 :(得分:3)
在你的考试中你有
return store.dispatch(actions.fetchBalanceRequest()).then(() => { ... })
您正在尝试测试返回对象的fetchBalanceRequest
,因此您无法在其上调用.then()
。在您的测试中,您实际上想要测试fetchBalance
,因为那是一个异步操作创建者(这就是您发布的redux文档中解释的内容)。
答案 1 :(得分:0)
这通常是redux-mock-store的问题
请记住:
从'redux-mock-store'导入configureStore
configureStore函数不会返回有效的商店,而是一个工厂。
这意味着您必须致电工厂才能获得商店:
const store = configureStore([])()