我正在尝试使用Mocha和Sinon对vuex动作执行单元测试
这是我的 action.spec.js
import actions from '@/vuex/actions'
import * as types from '@/vuex/mutation_types'
describe('actions.js', () => {
var server, store, lists, successPut, successPost, successDelete
successDelete = {'delete': true}
successPost = {'post': true}
successPut = {'put': true}
beforeEach(() => {
// mock shopping lists
lists = [{
id: '1',
title: 'Groceries'
}, {
id: '2',
title: 'Clothes'
}]
// mock store commit and dispatch methods
store = {
commit: (method, data) => {},
dispatch: () => {
return Promise.resolve()
},
state: {
shoppinglists: lists
}
}
sinon.stub(store, 'commit')
// mock server
server = sinon.fakeServer.create()
server.respondWith('GET', /shoppinglists/, xhr => {
xhr.respond(200, {'Content-Type': 'application/json'}, JSON.stringify(lists))
})
server.respondWith('POST', /shoppinglists/, xhr => {
xhr.respond(200, {'Content-Type': 'application/json'}, JSON.stringify(successPost))
})
server.respondWith('PUT', /shoppinglists/, xhr => {
xhr.respond(200, {'Content-Type': 'application/json'}, JSON.stringify(successPut))
})
server.respondWith('DELETE', /shoppinglists/, xhr => {
xhr.respond(200, {'Content-Type': 'application/json'}, JSON.stringify(successDelete))
})
server.autoRespond = true
})
afterEach(() => {
// restore stubs and server mock
store.commit.restore()
server.restore()
})
describe('populateShoppingLists', () => {
it('should call commit method with POPULATE_SHOPPING_LIST string parameter', done => {
actions.populateShoppingLists(store).then(() => {
expect(store.commit).to.have.been.calledWith(types.POPULATE_SHOPPING_LISTS, lists)
done()
}).catch(done)
})
})
describe('changeTitle', () => {
it('should call commit method with CHANGE_TITLE string', (done) => {
let title = 'new title'
actions.changeTitle(store, {title: title, id: '1'}).then(() => {
expect(store.commit).to.have.been.calledWith(types.CHANGE_TITLE, {title: title, id: '1'})
done()
}).catch(done)
})
})
describe('updateList', () => {
it('should return successful PUT response', (done) => {
actions.updateList(store, '1').then((data) => {
expect(data.data).to.eql(successPut)
done()
}).catch(done)
})
})
describe('createShoppingList', () => {
it('should return successful POST response', (done) => {
let newList = { title: 'new list', id: '3' }
actions.createShoppingList(store, newList).then((testResponse) => {
console.log('testResponse: ', testResponse)
expect(testResponse.body).to.eql(successPost)
done()
}).catch(done)
})
})
})
这是我的 action.js
import { CHANGE_TITLE, POPULATE_SHOPPING_LISTS } from './mutation_types'
import api from '../api'
import getters from './getters'
export default {
populateShoppingLists: ({ commit }) => {
return api.fetchShoppingLists().then(response => {
commit(POPULATE_SHOPPING_LISTS, response.data)
})
},
changeTitle: (store, data) => {
store.commit(CHANGE_TITLE, data)
return store.dispatch('updateList', data.id)
},
updateList: (store, id) => {
let shoppingList = getters.getListById(store.state, id)
return api.updateShoppingList(shoppingList)
},
createShoppingList: (store, shoppinglist) => {
return api.addNewShoppingList(shoppinglist).then((actionResponse) => {
console.log('actionResponse: ', actionResponse)
store.dispatch('populateShoppingLists')
})
},
}
运行我的单元测试,我的 createShoppingList 测试有问题
的console.log
actions.js
populateShoppingLists
✓ should call commit method with POPULATE_SHOPPING_LIST string parameter
changeTitle
✓ should call commit method with CHANGE_TITLE string
updateList
✓ should return successful PUT response
LOG LOG: 'actionResponse: ', Response{url: 'http://localhost:3000/shoppinglists', ok: true, status: 200, statusText: 'OK', headers: Headers{map: Object{Content-Type: ...}}, body: Object{post: true}, bodyText: '{"post":true}'}
LOG LOG: 'testResponse: ', undefined
createShoppingList
✗ should return successful POST response
undefined is not an object (evaluating 'testResponse.body')
webpack:///test/unit/specs/vuex/actions.spec.js:90:28 <- index.js:15508:28
webpack:///~/vue-resource/dist/vue-resource.es2015.js:151:0 <- index.js:17984:52
webpack:///~/vue/dist/vue.esm.js:701:0 <- index.js:3198:18
nextTickHandler@webpack:///~/vue/dist/vue.esm.js:648:0 <- index.js:3145:16
whicj表示在 createShoppingList 操作中,响应不会在返回时发回,所以expect(testResponse.body).to.eql(successPost)不是真的......
在这种情况下我的承诺处理有什么问题?
感谢您的反馈
答案 0 :(得分:0)
您走在正确的轨道上 - testResponse
是undefined
,因为createShoppingList
使用addNewShoppingList.then
的返回值解析,这是未指定的,默认为undefined
。
createShoppingList
应该通过addNewShoppingList
的回复或来自populateShoppingLists
的回复解决吗?如果是前者,请从处理程序返回actionResponse
:
return api.addNewShoppingList(shoppinglist).then((actionResponse) => {
store.dispatch('populateShoppingLists')
return actionResponse
});
作为旁注,因为您正在测试的操作是承诺,您可以在测试中get rid of done
直接返回操作:
it('should call commit method with POPULATE_SHOPPING_LIST string parameter', () => {
// mocha will fail the test if the promise chain rejects or the expectation is not met
return actions.populateShoppingLists(store).then(() => {
expect(store.commit).to.have.been.calledWith(types.POPULATE_SHOPPING_LISTS, lists)
})
})