My Node. js learning path (4) -- unit test _ node. js

In the professional software development process, no matter what platform language, now UnitTest is required. Node. js has the Assert of built-in. Today, let's take a look at the Node. js unit test. Here we use nodeunit for NPM installation:

Npm install nodeunit-g

Supports command line and browser running. Various assertions. In node. js, modularize the method to export exports. If it is an object to export module. exports, the module is the basis of the unit test. See the following node. js code:

var fs = require('fs'),global=require('./global.js');var utils = {startWith: function(s1, s) {if (s == null || s == "" || this.length == 0 || s.length > this.length)return false;if (s1.substr(0, s.length) == s)return true;elsereturn false;return true;},/* Generate GUID */getGuid: function() {var guid = "";for (var i = 1; i <= 32; i++) {var n = Math.floor(Math.random() * 16.0).toString(16);guid += n;}return guid;},/* add log information */writeLog: function(log) {if(!log) return;var text = fs.readFileSync(global.logFile, "utf-8"),_newLog = text ? (text + "\r\n" + log) : log;fs.writeFile(global.logFile, _newLog, function(err){if(err) throw err;});}};exports.utils=utils;

./Global. js is a local global variable file. Now we use NodeUnit to test the node. js code for the above Code:

var utils=new require('./utils.js');this.TestForUtils = {'TestgetGuid': function (test) {var guid=utils.utils.getGuid();test.ok(!!guid, 'getGuid should not be null.');test.done();},'TestWritelog': function (test) {var flag=false;utils.utils.writeLog("test message");flag=true;test.ok(flag,'writeLog');test.done();},'TestStartWithWords': function (test) {var name="ad_123";test.ok(utils.utils.startWith(name, "ad_"),"startwith method should be ok");test.done();}};

Test. OK is also a general asserted. You can also use node-inspector to debug the unit test program of NodeUnit.