Warning: Task "karma" not found when running grunt test

Question

http://www.sitepoint.com/kickstart-your-angularjs-development-with-yeoman-grunt-and-bower

After following this interesting guide about Angular, Yeoman, Bower and Grunt I was able tot bootstrap an Angular application.

Everything works fine except the testing with Karma. When I run:

grunt test

I get the following error:

Warning: Task "karma" not found. Used --force, continuing.

Done, but with warnings

I checked if I have installed Karma, but that is installed. For Grunt it appears you need to install grunt-karma. So I tried that throughout the following command:

npm install grunt-karma --save-dev

This gives me errrors like:

errno: 53,
code: 'ENOTEMPTY',
path: 'C:\\tmp\\phantomjs\\phantom-1.9.2-windows-.zip-extract-' ..

I am on Windows and executing commands from the powershell.

Hope someone can help.

Edit karma.conf.js and gruntfile

// Karma configuration
// http://karma-runner.github.io/0.10/config/configuration-file.html

module.exports = function(config) {
  config.set({
    // base path, that will be used to resolve files and exclude
    basePath: '',

    // testing framework to use (jasmine/mocha/qunit/...)
    frameworks: ['jasmine'],

    // list of files / patterns to load in the browser
    files: [
      'app/bower_components/angular/angular.js',
      'app/bower_components/angular-mocks/angular-mocks.js',
      'app/bower_components/angular-resource/angular-resource.js',
      'app/bower_components/angular-cookies/angular-cookies.js',
      'app/bower_components/angular-sanitize/angular-sanitize.js',
      'app/scripts/*.js',
      'app/scripts/**/*.js',
      'test/mock/**/*.js',
      'test/spec/**/*.js'
    ],

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

    // web server port
    port: 8080,

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


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


    // Start these browsers, currently available:
    // - Chrome
    // - ChromeCanary
    // - Firefox
    // - Opera
    // - Safari (only Mac)
    // - PhantomJS
    // - IE (only Windows)
    browsers: ['Chrome'],


    // Continuous Integration mode
    // if true, it capture browsers, run tests and exit
    singleRun: false
  });
};

Gruntfile

    // Generated on 2013-11-02 using generator-angular 0.5.1
'use strict';

// # Globbing
// for performance reasons we're only matching one level down:
// 'test/spec/{,*/}*.js'
// use this if you want to recursively match all subfolders:
// 'test/spec/**/*.js'

module.exports = function (grunt) {
  grunt.loadNpmTasks('grunt-karma');
  require('load-grunt-tasks')(grunt);
  require('time-grunt')(grunt);

  grunt.initConfig({
    yeoman: {
      // configurable paths
      app: require('./bower.json').appPath || 'app',
      dist: 'dist'
    },
    watch: {
      coffee: {
        files: ['<%= yeoman.app %>/scripts/{,*/}*.coffee'],
        tasks: ['coffee:dist']
      },
      coffeeTest: {
        files: ['test/spec/{,*/}*.coffee'],
        tasks: ['coffee:test']
      },
      compass: {
        files: ['<%= yeoman.app %>/styles/{,*/}*.{scss,sass}'],
        tasks: ['compass:server', 'autoprefixer']
      },
      styles: {
        files: ['<%= yeoman.app %>/styles/{,*/}*.css'],
        tasks: ['copy:styles', 'autoprefixer']
      },
      livereload: {
        options: {
          livereload: '<%= connect.options.livereload %>'
        },
        files: [
          '<%= yeoman.app %>/{,*/}*.html',
          '.tmp/styles/{,*/}*.css',
          '{.tmp,<%= yeoman.app %>}/scripts/{,*/}*.js',
          '<%= yeoman.app %>/images/{,*/}*.{png,jpg,jpeg,gif,webp,svg}'
        ]
      }
    },
    autoprefixer: {
      options: ['last 1 version'],
      dist: {
        files: [{
          expand: true,
          cwd: '.tmp/styles/',
          src: '{,*/}*.css',
          dest: '.tmp/styles/'
        }]
      }
    },
    connect: {
      options: {
        port: 9000,
        // Change this to '0.0.0.0' to access the server from outside.
        hostname: 'localhost',
        livereload: 35729
      },
      livereload: {
        options: {
          open: true,
          base: [
            '.tmp',
            '<%= yeoman.app %>'
          ]
        }
      },
      test: {
        options: {
          port: 9001,
          base: [
            '.tmp',
            'test',
            '<%= yeoman.app %>'
          ]
        }
      },
      dist: {
        options: {
          base: '<%= yeoman.dist %>'
        }
      }
    },
    clean: {
      dist: {
        files: [{
          dot: true,
          src: [
            '.tmp',
            '<%= yeoman.dist %>/*',
            '!<%= yeoman.dist %>/.git*'
          ]
        }]
      },
      server: '.tmp'
    },
    jshint: {
      options: {
        jshintrc: '.jshintrc'
      },
      all: [
        'Gruntfile.js',
        '<%= yeoman.app %>/scripts/{,*/}*.js'
      ]
    },
    coffee: {
      options: {
        sourceMap: true,
        sourceRoot: ''
      },
      dist: {
        files: [{
          expand: true,
          cwd: '<%= yeoman.app %>/scripts',
          src: '{,*/}*.coffee',
          dest: '.tmp/scripts',
          ext: '.js'
        }]
      },
      test: {
        files: [{
          expand: true,
          cwd: 'test/spec',
          src: '{,*/}*.coffee',
          dest: '.tmp/spec',
          ext: '.js'
        }]
      }
    },
    compass: {
      options: {
        sassDir: '<%= yeoman.app %>/styles',
        cssDir: '.tmp/styles',
        generatedImagesDir: '.tmp/images/generated',
        imagesDir: '<%= yeoman.app %>/images',
        javascriptsDir: '<%= yeoman.app %>/scripts',
        fontsDir: '<%= yeoman.app %>/styles/fonts',
        importPath: '<%= yeoman.app %>/bower_components',
        httpImagesPath: '/images',
        httpGeneratedImagesPath: '/images/generated',
        httpFontsPath: '/styles/fonts',
        relativeAssets: false
      },
      dist: {},
      server: {
        options: {
          debugInfo: true
        }
      }
    },
    // not used since Uglify task does concat,
    // but still available if needed
    /*concat: {
      dist: {}
    },*/
    rev: {
      dist: {
        files: {
          src: [
            '<%= yeoman.dist %>/scripts/{,*/}*.js',
            '<%= yeoman.dist %>/styles/{,*/}*.css',
            '<%= yeoman.dist %>/images/{,*/}*.{png,jpg,jpeg,gif,webp,svg}',
            '<%= yeoman.dist %>/styles/fonts/*'
          ]
        }
      }
    },
    useminPrepare: {
      html: '<%= yeoman.app %>/index.html',
      options: {
        dest: '<%= yeoman.dist %>'
      }
    },
    usemin: {
      html: ['<%= yeoman.dist %>/{,*/}*.html'],
      css: ['<%= yeoman.dist %>/styles/{,*/}*.css'],
      options: {
        dirs: ['<%= yeoman.dist %>']
      }
    },
    imagemin: {
      dist: {
        files: [{
          expand: true,
          cwd: '<%= yeoman.app %>/images',
          src: '{,*/}*.{png,jpg,jpeg}',
          dest: '<%= yeoman.dist %>/images'
        }]
      }
    },
    svgmin: {
      dist: {
        files: [{
          expand: true,
          cwd: '<%= yeoman.app %>/images',
          src: '{,*/}*.svg',
          dest: '<%= yeoman.dist %>/images'
        }]
      }
    },
    cssmin: {
      // By default, your `index.html` <!-- Usemin Block --> will take care of
      // minification. This option is pre-configured if you do not wish to use
      // Usemin blocks.
      // dist: {
      //   files: {
      //     '<%= yeoman.dist %>/styles/main.css': [
      //       '.tmp/styles/{,*/}*.css',
      //       '<%= yeoman.app %>/styles/{,*/}*.css'
      //     ]
      //   }
      // }
    },
    htmlmin: {
      dist: {
        options: {
          /*removeCommentsFromCDATA: true,
          // https://github.com/yeoman/grunt-usemin/issues/44
          //collapseWhitespace: true,
          collapseBooleanAttributes: true,
          removeAttributeQuotes: true,
          removeRedundantAttributes: true,
          useShortDoctype: true,
          removeEmptyAttributes: true,
          removeOptionalTags: true*/
        },
        files: [{
          expand: true,
          cwd: '<%= yeoman.app %>',
          src: ['*.html', 'views/*.html'],
          dest: '<%= yeoman.dist %>'
        }]
      }
    },
    // Put files not handled in other tasks here
    copy: {
      dist: {
        files: [{
          expand: true,
          dot: true,
          cwd: '<%= yeoman.app %>',
          dest: '<%= yeoman.dist %>',
          src: [
            '*.{ico,png,txt}',
            '.htaccess',
            'bower_components/**/*',
            'images/{,*/}*.{gif,webp}',
            'styles/fonts/*'
          ]
        }, {
          expand: true,
          cwd: '.tmp/images',
          dest: '<%= yeoman.dist %>/images',
          src: [
            'generated/*'
          ]
        }]
      },
      styles: {
        expand: true,
        cwd: '<%= yeoman.app %>/styles',
        dest: '.tmp/styles/',
        src: '{,*/}*.css'
      }
    },
    concurrent: {
      server: [
        'coffee:dist',
        'compass:server',
        'copy:styles'
      ],
      test: [
        'coffee',
        'compass',
        'copy:styles'
      ],
      dist: [
        'coffee',
        'compass:dist',
        'copy:styles',
        'imagemin',
        'svgmin',
        'htmlmin'
      ]
    },
    karma: {
      unit: {
        configFile: 'karma.conf.js',
        singleRun: true
      }
    },
    cdnify: {
      dist: {
        html: ['<%= yeoman.dist %>/*.html']
      }
    },
    ngmin: {
      dist: {
        files: [{
          expand: true,
          cwd: '<%= yeoman.dist %>/scripts',
          src: '*.js',
          dest: '<%= yeoman.dist %>/scripts'
        }]
      }
    },
    uglify: {
      dist: {
        files: {
          '<%= yeoman.dist %>/scripts/scripts.js': [
            '<%= yeoman.dist %>/scripts/scripts.js'
          ]
        }
      }
    }
  });

  grunt.registerTask('server', function (target) {
    if (target === 'dist') {
      return grunt.task.run(['build', 'connect:dist:keepalive']);
    }

    grunt.task.run([
      'clean:server',
      'concurrent:server',
      'autoprefixer',
      'connect:livereload',
      'watch'
    ]);
  });

  grunt.registerTask('test', [
    'clean:server',
    'concurrent:test',
    'autoprefixer',
    'connect:test',
    'karma'
  ]);

  grunt.registerTask('build', [
    'clean:dist',
    'useminPrepare',
    'concurrent:dist',
    'autoprefixer',
    'concat',
    'copy:dist',
    'cdnify',
    'ngmin',
    'cssmin',
    'uglify',
    'rev',
    'usemin'
  ]);

  grunt.registerTask('default', [
    'jshint',
    'test',
    'build'
  ]);
};

Solution

Download phantomjs package from https://github.com/Obvious/phantomjs

Unpack and copy it into node_modules of your project.

Run below command gain:

npm install grunt-karma --save-dev

Hope this help.