Error: Cannot find module 'jasmine-core'

I installed the following for testing:

我安装了以下测试:

"devDependencies": {
    "jasmine-core": "^2.4.1",
    "karma": "^0.13.22",
    "karma-jasmine": "^0.3.7",
    "karma-phantomjs-launcher": "^1.0.0"
}

After running karma start I get the following error:

运行业力开始后,我收到以下错误:

Doing a search this is the first question with the same problem: karma start Cannot find module 'jasmine-core'

进行搜索这是第一个有同样问题的问题:karma start无法找到模块'jasmine-core'

However I've tried both answers, installed jasmine-core globally and I already did npm install jasmine-core --save-dev :(

但是我已经尝试了两个答案,全局安装了jasmine-core我已经做了npm install jasmine-core --save-dev :(

My test/index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Jasmine Spec Runner</title>
    <link href="testing.css" rel="stylesheet">
    <script src="../app/assets/js/libs/vendors.min.js"></script>
    <script src="../app/assets/js/bundle.js"></script>
</head>

<body>

    <div>
        <header>
            <h1>Jasmine tests for Dashboard</h1>
        </header>
    </div>

</body>
</html>

My karma.conf.js

// Karma configuration
// Generated on Mon Mar 14 2016 11:56:04 GMT-0500 (CDT)

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: [
      'app/assets/js/bundle.js',
      '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: false,


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


    // 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
  })
}

4 个解决方案

#1

Just a guess, but try cleaning the npm cache, removing the node_modules and reinstalling everything from scratch:

只是一个猜测,但尝试清理npm缓存,删除node_modules并从头开始重新安装所有内容:

$ rm -rf node_modules
$ npm cache clean
$ npm i

$ sudo npm uninstall -g jasmine-core 
$ sudo npm cache clean -f
$ sudo npm i -g jasmine-core

#2

When declaring karma in package.json, then it's installed as a local dependency within the node_modules directory of your project. But running karma start from the console executes your globally installed karma. So there are two versions of Karma (local & global) and both have a dependency to jasmine-core, which needs to get installed.

在package.json中声明karma时,它将作为本地依赖项安装在项目的node_modules目录中。但是从控制台开始运行业力会执行全局安装的业力。因此有两个版本的Karma(本地和全局),并且都依赖于jasmine-core,需要安装。

When getting Cannot find module 'jasmine-core' on karma start, then the globally installed Karma misses "jasmine-core". So make sure you have this also installed globally. Best is to run the following commands:

当获得无法在业力开始时找到模块'jasmine-core'时,全球安装的Karma错过了“jasmine-core”。因此,请确保全局安装此功能。最好是运行以下命令:

npm install -g karma
npm install -g jasmine-core
npm install -g karma-jasmine

Afterwards you should be able to run karma start on a directory which has a karma.conf.js file.

之后你应该能够在一个有karma.conf.js文件的目录上运行karma start。

You can also use a locally installed Karma. All you need to do is to install it this way:

您也可以使用本地安装的Karma。您需要做的就是以这种方式安装它:

npm install --save-dev karma 
npm install --save-dev jasmine-core
npm install --save-dev karma-jasmine

If you have done that, then make sure that you also execute it from it's path in node_modules:

如果你已经这样做了,那么确保你也从node_modules中的路径执行它:

./node_modules/karma/bin/karma start

#3

If you start karma on the command line within a local directory, you should install karma-cli globally instead of karma.

如果你在本地目录中的命令行上启动karma,你应该在全局安装karma-cli而不是karma。

Reference

#4

Simply navigate to the karma-jasmine directory in the node modules:

只需导航到节点模块中的karma-jasmine目录:

cd node_modules/karma-jasmine

and run npm install. jasmine-core is in the devDependecies inside the package.json file. Navigate back to your root and re-run

并运行npm install。 jasmine-core位于package.json文件中的devDependecies中。导航回根目录并重新运行

karma start karma-conf.js

This should eliminate that error.

这应该消除该错误。

#1