Error: You need to include some adapter that implements __karma__.start method

Question

I\'m trying to add some unit tests to one of my projects.

So far I\'ve installed and configured karma, and have installed jasmine. I\'ve one test file in my te

Answer 1

If you typing "karma start", you must have a karma.conf.js file in the current folder. or just "karma start /path/karma.conf.js"

Try to create a new karmar.conf.js by "karma init /path/karma.conf.js"

Answer 2

I had a problem with karma.conf.js file code format:

files: [
    // Modules
    ,"client/bower_components/angular/angular.min.js"
    ,"client/bower_components/angular-mocks/angular-mocks.js"
    // App
    ,"client/app/app.module.js"
    // Test
    // ,"test/**/*.spec.js"
],

The extra comma in files array have cause this error:

You need to include some adapter that implements __karma__.start method!

Answer 3

I received this error because I required the same dependency twice!

Removing the duplicate file dependency removed the error for me. Circled in blue below.

Answer 4

You must specify the the karma configuration file to karma.

karma start karma.config.js 

It works for me

Answer 5

In my case, the message was in fact very descriptive: I forgot to add an adapter, in my case Jasmine, into the config file. Thus:

module.exports = function(config) {
  config.set({
      browsers: ['Chrome'],
      singleRun: true,
      frameworks: ['jasmine'],
      files: [
          // ... files ...
      ],
      // other configs
    });
};

Answer 6

In my case, the configuration file name was different. So, running the command specifying the conf file solved my issue.

>> karma start unit-tests.conf.js
No captured browser, open http://localhost:9876/
...

And for 'PhantomJS', opening the link specified(localhost:9876) in the browser executes the test cases.

Hope it helps. :)

EDIT 1: My Karma Config File

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: [
      './node_modules/angular/angular.js',
      './node_modules/angular-ui-router/release/angular-ui-router.js',
      './node_modules/angular-mocks/angular-mocks.js',
      './app/services/users/users.js',
      './app/app.js',
      './app/services/users/users.spec.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: ['spec'],


    // 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,

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