node.js – 用茉莉花模拟模块

我正在尝试为使用node.js框架编写的服务器端逻辑编写一些unit testing。 我想用jasmine库进行unit testing和嘲笑，因为我对它有点熟悉。

现在，我尝试了这样的模拟文件系统readfunction：

 'use strict'; var loginRedirectMiddleware = require('../server/loginRedirectMiddleware'); var fs = require('fs'); var util = require('../server/util'); describe('loginRedirectMiddleware', function(){ spyOn(fs,'read'); ... }); 

现在我得到一个与spyOn调用线上的错误：

  1) loginRedirectMiddleware encountered a declaration exception Message: TypeError: Cannot call method 'spyOn' of null Stacktrace: TypeError: Cannot call method 'spyOn' of null at null.<anonymous> (/home/adebksi/Nauka/js-linkedin-connector/server_test/loginRedirectMiddlewareSpec.js:11:3) at Object.<anonymous> (/home/adebksi/Nauka/js-linkedin-connector/server_test/loginRedirectMiddlewareSpec.js:10:1) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (/home/adebksi/Nauka/js-linkedin-connector/node_modules/karma/node_modules/coffee-script/lib/coffee-script/coffee-script.js:211:36) at Function.Module._load (module.js:312:12) at Module.require (module.js:364:17) at require (module.js:380:17) at Object.jasmine.executeSpecsInFolder (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt-jasmine-node/node_modules/jasmine-node/lib/jasmine-node/index.js:151:9) at Object.<anonymous> (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt-jasmine-node/tasks/jasmine-node-task.js:110:19) at Object.thisTask.fn (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt/lib/grunt/task.js:78:16) at Object.<anonymous> (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt/lib/util/task.js:282:30) at Task.runTaskFn (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt/lib/util/task.js:235:24) at Task.<anonymous> (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt/lib/util/task.js:281:12) at Task.start (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt/lib/util/task.js:290:5) at Object.grunt.tasks (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt/lib/grunt.js:155:8) at Object.module.exports [as cli] (/home/adebksi/Nauka/js-linkedin-connector/node_modules/grunt/lib/grunt/cli.js:38:9) at Object.<anonymous> (/home/adebksi/.nvm/v0.10.15/lib/node_modules/grunt-cli/bin/grunt:41:20) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:901:3 

我想知道我做错了什么？

当我做console.log(typeof fs.read)我得到function所以这个属性是一个函数。

Answer 1

好吧，原来这是我的错，我试图在describefunction中创build间谍，我应该把它放在它的例子。