一个单元如何使用 Express 测试路由? [英] How does one unit test routes with Express?

问题描述

我正在学习 Node.js，并且一直在玩 Express.真的很喜欢这个框架；但是，我无法弄清楚如何为路由编写单元/集成测试.

I'm in the process of learning Node.js and have been playing around with Express. Really like the framework;however, I'm having trouble figuring out how to write a unit/integration test for a route.

能够对简单模块进行单元测试很容易，并且已经使用 Mocha 做到了；但是，我使用 Express 的单元测试失败了，因为我传入的响应对象没有保留值.

Being able to unit test simple modules is easy and have been doing it with Mocha; however, my unit tests with Express fail since the response object I'm passing in doesn't retain the values.

被测路由功能(routes/index.js):

exports.index = function(req, res){
  res.render('index', { title: 'Express' })
};

单元测试模块:

var should = require("should")
    , routes = require("../routes");

var request = {};
var response = {
    viewName: ""
    , data : {}
    , render: function(view, viewData) {
        viewName = view;
        data = viewData;
    }
};

describe("Routing", function(){
    describe("Default Route", function(){
        it("should provide the a title and the index view name", function(){
        routes.index(request, response);
        response.viewName.should.equal("index");
        });

    });
});

当我运行它时，它因错误:检测到全局泄漏:viewName，数据"而失败.

When I run this, it fails for "Error: global leaks detected: viewName, data".

1. 我哪里出错了才能让它正常工作?

1. Where am I going wrong so that I can get this working?

有没有更好的方法可以在这个级别对我的代码进行单元测试?

Is there a better way for me to unit test my code at this level?

更新1. 更正了代码片段，因为我最初忘记了it()".

Update 1. Corrected code snippet since I initially forgot "it()".

推荐答案

更改您的响应对象:

var response = {
    viewName: ""
    , data : {}
    , render: function(view, viewData) {
        this.viewName = view;
        this.data = viewData;
    }
};

它会起作用.

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