在命令行上运行Mocha并包含文件

时间:2013-11-19 23:29:55

标签: javascript node.js unit-testing mocha chai

我正在尝试使用Mocha设置一些JS单元测试,理想情况下,我希望通过命令行运行它来反对网页。 ( TL:DR; 在底部)

首先,我做了一些废话测试,以确认Array按预期工作,我直接从Mocha的页面http://visionmedia.github.io/mocha/#getting-started中提取,这样可以正常工作。

此时,为了增加赌注,我创建了一个新文件/src/cow.js:

/** This example is taken from https://nicolas.perriault.net/code/2013/testing-frontend-javascript-code-using-mocha-chai-and-sinon/**/
(function(exports) {
    "use strict";

    function Cow(name) {
        this.name = name || "Anon cow";
    }
    exports.Cow = Cow;

    Cow.prototype = {
        greets: function(target) {
            if (!target)
                throw new Error("missing target");
            return this.name + " greets " + target;
        }
    };
})(this);

以及我的测试文件/test/test.js:

var chai = require("chai"),
    expect = chai.expect;

require( "../src/cow.js");

describe( "Cow", function(){

    describe( "constructor", function(){
        it( "should have a default name", function(){
            var cow = new Cow();
            expect( cow.name).to.equal( "Anon cow");
        });

        it( "show use provided name", function(){
            var name = "duck Cow",
                cow = new Cow( name );
            expect( cow.name).to.equal( name );
        })
    });
});

然后跑了' mocha'。此时我收到以下错误:

    1) Cow constructor should have a default name:
        ReferenceError: Cow is not defined
    at Context.<anonymous> (C:\Users\myUserName\\jsUnitTesting\helloWorld\test\test.js:10:27)
    at Test.Runnable.run (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runnable.js:211:32)
    at Runner.runTest (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:358:10)
    at C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:404:12
    at next (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:284:14)
    at C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:293:7
    at next (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:237:23)
    at Object._onImmediate (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:261:5)
    at processImmediate [as _immediateCallback] (timers.js:330:15)

    2) Cow constructor show use provided name:
        ReferenceError: Cow is not defined
    at Context.<anonymous> (C:\Users\myUserName\\jsUnitTesting\helloWorld\test\test.js:16:27)
    at Test.Runnable.run (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runnable.js:211:32)
    at Runner.runTest (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:358:10)
    at C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:404:12
    at next (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:284:14)
    at C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:293:7
    at next (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:237:23)
    at Object._onImmediate (C:\Users\myUserName\AppData\Roaming\npm\node_modules\mocha\lib\runner.js:261:5)
    at processImmediate [as _immediateCallback] (timers.js:330:15)

这显然不太理想。我认为这是因为test.js不知道cow.js.正如您所看到的,我已经使用了要求,但这似乎不起作用。

TL:DR

那么,将这个文件(cow.js)添加到我的测试文件(test.js)的正确方法是什么?目前,除了mocha和nodeJS之外,我还没有使用任何库。

谢谢!

2 个答案:

答案 0 :(得分:5)

唯一缺少的是从require()引用Cow导出。

你只需改变这一行:

require( "../src/cow.js" );

对此:

var Cow = require( "../src/cow.js" ).Cow;

答案 1 :(得分:3)

您始终可以在运行时指定文件

-r, --require <name>            require the given module

mocha -r ../src/cow.js  yourcode.js