javascript的karma测试框架环境简单介绍

---

1.环境介绍（windows系统+webstorm编辑器）

• 安装nvmw，管理node的版本
• 安装node v0.10.21版本，karma框架暂时支持v0.10版本node
• 安装karma和插件

install karma:npm install karma --save-dev
install plugins:npm install karma-jasmine karma-chrome-launcher --save-dev
命令接口：npm install -g karma-cli

---

2.配置文件：

初始化配置文件：karma init

修改如下：
修改需要测试的文件目录配置项：files

// Karma configuration
// Generated on Fri May 15 2015 09:30:32 GMT+0800 (中国标准时间)

module.exports = function(config) {
  config.set({

    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',


    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['jasmine'],


    // list of files / patterns to load in the browser
    files: [
      'test/*.js'
    ],


    // list of files to exclude
    exclude: [
    ],


    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
    },


    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['progress'],


    // web server port
    port: 9876,


    // enable / disable colors in the output (reporters and logs)
    colors: true,


    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,


    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,


    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['Chrome'],


    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false
  });
};

---

3.demo测试
源文件src.js

/**
 * 字符串翻转
 * @param name
 * @returns {string}
 */
function reverse(name) {
    return name.split("").reverse().join("");
}

/**
 * 判断是否是整数
 * @param num
 * @returns {boolean}
 */
function isInteger(num) {
    if (typeof num !== "number") return false;
    var pattern = /^[1-9]\d*$/g;
    return pattern.test(num);
}

/**
 * 判断value的数据类型
 * @param value
 */
function getTypeofVal(val) {
    if(typeof val == 'object'){
        return objType(val);
    }
    return typeof val;
}

/**
 * 获取对象的类型
 * @param arr
 * @returns {string}
 */
function objType(arr){
    return Object.prototype.toString.apply(arr);
}

测试文件test.spec.js

/**
 * 测试整数
 */
describe("this is a integer test!", function () {
    it("Is integer", function () {
        expect(true).toEqual(isInteger(20));
        expect(false).toEqual(isInteger("20"));
        expect(false).toEqual(isInteger(0));
        expect(false).toEqual(isInteger(0.1));
    })
});

/**
 * 测试翻转
 */
describe("this is a string reverse test!", function () {
    it("reverse String", function () {
        expect("DCBA").toEqual(reverse("ABCD"))
    })
});

describe("Math method test!", function () {
    it("Math method", function () {
        expect(1.0).toEqual(Math.round(.6));
        expect(1.0).toEqual(Math.ceil(.6));
        expect(0.0).toEqual(Math.floor(.6));
    })

    it("number cacl", function () {
        var x = .3 - .2;
        var y = .2 - .1;
        expect(false).toEqual(x == y);
        expect(false).toEqual(x == .1);
        expect(true).toEqual(y == .1);
    })
});

/**
 * 测试数据类型
 */
describe("data type method test!", function () {
    it("base data type", function () {
        expect('number').toEqual(getTypeofVal(80));
        expect('string').toEqual(getTypeofVal("this is a string"));
        expect('number').toEqual(getTypeofVal(NaN));
        expect('boolean').toEqual(getTypeofVal(true));
    })

    it("object type",function(){
        expect('[object Null]').toEqual(objType(null));
        expect('[object Array]').toEqual(objType(values));
        expect('[object Date]').toEqual(objType(now));
        expect('[object Function]').toEqual(objType(printArray));

    })
});

启动测试:karma start karma.conf.js

结果如下：

D:\practise\node\awesome-test>karma start karma.conf.js
INFO [karma]: Karma v0.12.31 server started at http://localhost:9876/
INFO [launcher]: Starting browser Chrome
INFO [Chrome 41.0.2272 (Windows 7)]: Connected on socket j6Z3lnrXa4ZDPCGKrsq_ with id 82349825
Chrome 41.0.2272 (Windows 7) LOG: 1
Chrome 41.0.2272 (Windows 7) LOG: 2
Chrome 41.0.2272 (Windows 7) LOG: 3
Chrome 41.0.2272 (Windows 7) LOG: Object{from: 1, to: 3}

查看浏览器结果：

Paste_Image.png