单元测试猫鼬承诺

时间:2016-02-09 19:24:58

标签: node.js mongoose mocha sinon chai

我在Node应用程序中有一个使用Mongoose查询Mongo数据库的快速路由。 get请求中有一个承诺用于查找项目,我不确定如何测试此承诺。

我对单元测试节点应用程序不是很熟悉。

以下是快速路线的代码,这有效,但我不知道如何测试它:

var express = require('express');
var router = express.Router();
var promise = require('bluebird');
// bluebird.promisifyAll is used on Mongoose in app.js
var ItemModel = require('./itemModel');

router.get('/', function(req, res, next) {
    ItemModel.findAsync()
        .then(function(items) {
            res.status(200).send(items);
        })
        .catch(function(err) {
            next(err);
        });

});

module.exports = router;

到目前为止,这是我在测试中剔除的内容。我不确定如何在routes.get方法中测试promise:

describe('ItemRoute', function() {
    var express = require('express');
    var bodyParser = require('bodyParser');
    var supertest = require('supertest');
    var sinon = require('sinon');
    var expect = require('chai').expect;
    var assert = require('chai').assert;

    var ItemModel = require('./ItemModel');
    var ItemRoute = require('ItemRoute');

    var uri = '/items/';

    var agent;

    beforeEach(function(done) {
        var app = express();

        app.use(bodyParser.json());
        app.use(bodyParser.urlencoded({extended: false}));
        app.use(uri, releaseNotesRoute);

        agent = supertest.agent(app);

        done();
    });

    describe('GET', function() {
        it('returns an empty array when no items are stored in Mongo', function() {

            // Not sure how to test the route here with a get that
            // uses a promise, ItemModel.findAsync().then

        });
    });

});

1 个答案:

答案 0 :(得分:1)

为了能够在测试中使用promises,你必须从npm安装sinon-as-promises模块。然后你可以像这样模拟ItemModel:

var itemModelMock = sinon.mock(ItemModel);
itemModelMock.expects('findAsync').resolves([]);