Karma / Istanbul Code Coverage找不到功能并始终返回100％ [英] Karma/Istanbul Code Coverage does not find functions and always returns 100%

问题描述

我正在尝试为我的Karma测试添加代码覆盖率，但是虽然它找到了我正在测试的正确JS文件，但它找不到这些文件中的函数。

I am attempting to add Code Coverage for my Karma tests, however although it finds the correct JS files that I'm testing, it does not find the functions inside those files.

从我到目前为止所读到的内容，我认为在传递给伊斯坦布尔进行报道之前，文件没有被正确浏览，但不可否认我是新手，所以我希望有一些建议。

From what I have read so far I believe it to be to do with the files not being correctly browserified before being passed to istanbul to do the coverage, but admittedly I am new to this so I'm hoping for some suggestions.

这是我的JS文件（common.js）：

Here is my JS file(common.js):

var applicationSettings = require('./settings');

var common = {
    getAjaxBaseUrl: function () {
        var strVirtualDirectory = applicationSettings.VirtualDirectory;
        if (strVirtualDirectory.length > 1) {
            if (!strVirtualDirectory.startsWith("/")) {
                strVirtualDirectory = "/" + strVirtualDirectory;
            }
        }
    return strVirtualDirectory;
   }
}
module.exports = common;

这是我写的测试：

it('Client - Should get correct AjaxBaseUrl with /', function () {
    var clientSettings = require('./../client/scripts/settings');
    var clientCommon = require('./../client/scripts/common');

    clientSettings.VirtualDirectory = '/VD';
    expect(clientCommon.getAjaxBaseUrl()).to.equal('/VD');

});

it('Client - Should get correct AjaxBaseUrl without /', function () {
    var clientSettings = require('./../client/scripts/settings');
    var clientCommon = require('./../client/scripts/common');

    clientSettings.VirtualDirectory = 'VD';
    expect(clientCommon.getAjaxBaseUrl()).to.equal('/VD');
});

我的Karma.conf如下：

My Karma.conf is below:

// Karma configuration
// Generated on Mon Jan 11 2016 09:43:00 GMT+0000 (GMT Standard Time)

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: ['phantomjs-shim', 'browserify', 'mocha'],

        // list of files / patterns to load in the browser
        files: [
            'https://code.jquery.com/jquery-2.2.0.min.js',
            'http://cdn.kendostatic.com/2015.3.1111/js/kendo.all.min.js',
            'test_unit/*Spec.js',
            'client/scripts/*.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_unit/*Spec.js': ['browserify'],
            'client/scripts/*.js': ['browserify', 'coverage']    
        },

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

        // Configure jUnit reporter
        junitReporter: {
            outputDir: '', // results will be saved as $outputDir/$browserName.xml 
            outputFile: undefined, // if included, results will be saved as $outputDir/$browserName/$outputFile 
            suite: '', // suite will become the package name attribute in xml testsuite element 
            useBrowserName: true // add browser name to report and classes names 
        },

        // Configure coverage reporter
        coverageReporter: {
            type: 'html',
            dir: 'test_coverage',
            subdir: '.',
            file: 'coverage.htm'
        },

        // 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: false,

        browserify: {
            configure: function (bundle) {
                bundle.transform('reactify', { extensions: ['.jsx'] });
            }        
        },        

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

        // Concurrency level
        // how many browser should be started simultaneous
        concurrency: Infinity,

    })
}

这确实产生了一个报告，但这显示了100％，并且在common.js文件中找到的唯一行是：

This does produce a report, but this shows 100% and the only line found in the common.js file is:

require("C:\\Source\\ProjectName\\client\\scripts\\common.js");

我尝试将Browerify-Istanbul添加到混合中，方法是在顶部添加一个需求Karma.conf在browserify部分中的另一个转换

I attempted to add Browerify-Istanbul into the mix, by adding a require for it at the top of the Karma.conf an additional transform in the browserify section

bundle.transform(istanbul)

然而，这只会让我的测试失败并抛出几个错误：

However this just makes my tests fail and throw several errors:

undefined不是对象（评估
'__ cov_qQLFhXEMt7fatxiMx0_vQQ.b ['1'] [0]'）
getAjaxBaseUrl @ C：/Users/CHARLE~1.WIC/AppData/Local/ Temp / 0d61da722d2838c9
600d83d1cbb4c0b8.browserify：43：1498
C：/Users/CHARLE~1.WIC/AppData/Local/Temp/0d61da722d2838c9600d83d1cbb4c0b
8.browserify：51742：1849

undefined is not an object (evaluating '__cov_qQLFhXEMt7fatxiMx0_vQQ.b[' 1'][0]') getAjaxBaseUrl@C:/Users/CHARLE~1.WIC/AppData/Local/Temp/0d61da722d2838c9 600d83d1cbb4c0b8.browserify:43:1498 C:/Users/CHARLE~1.WIC/AppData/Local/Temp/0d61da722d2838c9600d83d1cbb4c0b 8.browserify:51742:1849

16 02 2016 09：14：08.515：错误[覆盖]：[TypeError：无法读取未定义的
属性'star t'类型错误：无法读取属性
'开始'的未定义
在C：\ Source \ ProjectName \ node_modules \\\ ncostbul \ lib \ o bject-utils.js：59：44
at Array.forEach（native）
at Object.addDerivedInfoForFile（C：\ Source \ProjectName \ node_modules \\\ indbulbul \ lib \ object -utils.js：58：37）
at Object.Collector.fileCoverageFor（C：\ Source \ProjectName \ node_modules \ _dobbul \ lib \ Collector.js：94：15）
位于C：\Source \ ProjectName \\\
ode_modules \istanbul \lib \ r eport \ html.js：558：90
at Array.forEach（native）
at HtmlReport。 Report.mix.writeReport（C：\ Source \ProjectName \\\
ode_modules\istanbul\lib\report\html.js:557:27）writeReport的
（C：\ Source \ ProjectName \\\
ode_modules\k arma-coverage \lib \ renporter.js：62：16）
at C：\ Source \ ProjectName \\\
ode_modules\karma-coverage \lib \ renporter .js：288：11
在C：\ Source \ ProjectName \ node_modules \\\\\\\\\\\\\\\帮助er.js：82：7
at FSReqWrap.oncomplete（fs.js：82：15）

16 02 2016 09:14:08.515:ERROR [coverage]: [TypeError: Cannot read property 'star t' of undefined] TypeError: Cannot read property 'start' of undefined at C:\Source\ProjectName\node_modules\istanbul\lib\o bject-utils.js:59:44 at Array.forEach (native) at Object.addDerivedInfoForFile (C:\Source\ProjectName\node_modules\istanbul\lib\object-utils.js:58:37) at Object.Collector.fileCoverageFor (C:\Source\ProjectName\node_modules\istanbul\lib\collector.js:94:15) at C:\Source\ProjectName\node_modules\istanbul\lib\r eport\html.js:558:90 at Array.forEach (native) at HtmlReport.Report.mix.writeReport (C:\Source\ProjectName\node_modules\istanbul\lib\report\html.js:557:27) at writeReport (C:\Source\ProjectName\node_modules\k arma-coverage\lib\reporter.js:62:16) at C:\Source\ProjectName\node_modules\karma-coverage \lib\reporter.js:288:11 at C:\Source\ProjectName\node_modules\karma\lib\help er.js:82:7 at FSReqWrap.oncomplete (fs.js:82:15)

我是错过了什么，或者走错了路？

Am I missing something, or going about this the wrong way?

推荐答案

我遇到了同样的问题。对我有用的是从预处理器部分删除coverage并使用browserify-istanbul。此外，您希望将browserify-istanbul配置为忽略您的测试文件。

I had the exact same issue. What worked for me was removing "coverage" from the preprocessors section AND using browserify-istanbul. Also, you want to configure browserify-istanbul to ignore your test files.

因此您的预处理器应该类似于（删除'coverage'）：

So your preprocessors should look something like (removed 'coverage'):

// preprocess matching files before serving them to the browser
// available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
preprocessors: {
    'test_unit/*Spec.js': ['browserify'],
    'client/scripts/*.js': ['browserify']    
},

您的browserify配置应如下所示：

And your browserify config should look something like:

browserify: {
    configure: function (bundle) {
        bundle.transform('reactify', { extensions: ['.jsx'] });
        bundle.transform(require('browserify-istanbul')({
          ignore: ['**/test_unit/**']
        }));
    }        
},        

希望有帮助

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