Laravel + VueJS + Karma

karma.conf.js

const webpackConfig = require('../../../../../node_modules/laravel-mix/setup/webpack.config');
// const path = require('path');

// safari >=4

// no need for app entry during tests
delete webpackConfig.entry;

module.exports = (config) => {
    // noinspection ES6ConvertVarToLetConst
    var browsers = ['Chrome', 'PhantomJS']; // eslint-disable-line

    config.set({
        // start these browsers
        // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
        browsers: browsers, // eslint-disable-line

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

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

        // frameworks to use
        // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
        frameworks: ['mocha', 'sinon-chai'],

        // test results reporter to use
        // possible values: 'dots', 'progress'
        // available reporters: https://npmjs.org/browse/keyword/karma-reporter
        // reporters: ['progress', 'spec', 'coverage', 'coverage-istanbul'],
        reporters: ['spec'],
        coverageReporter: {
            dir: './coverage',
            reporters: [
                { type: 'lcov', subdir: '.' },
                { type: 'text-summary' },
            ]
        },

        // List of files / patterns to load in the browser
        files: [
            './index.js', // This is an entry point (for GLOBBED files)
            {
                pattern: '../../../../../node_modules/jquery/dist/jquery.min.js',
                requirejs: {
                    name: 'jquery',
                }
            },
            {
                pattern: '../../../../../node_modules/tether/dist/js/tether.js',
                requirejs: {
                    name: 'tether',
                }
            },
            {
                pattern: '../../../../../node_modules/bootstrap/dist/js/bootstrap.js',
                requirejs: {
                    name: 'bootstrap',
                }
            },
        ],

        // preprocess matching files before serving them to the browser
        // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
        preprocessors: {
            './index.js': ['webpack', 'sourcemap'],
        },

        webpack: webpackConfig,
        webpackMiddleware: {
            noInfo: 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,

        client: {
            mocha: {
                bail: true,
            },
        },

        // web server port
        port: 9876,

        // enable / disable colors in the output (reporters and logs)
        colors: true,
    });
};