karma.conf.js

// Karma configuration
// Generated on Tue Nov 26 2019 10:03:48 GMT+0200 (Eastern European Standard Time)
process.env.CHROME_BIN = require('puppeteer').executablePath()

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: [
            'specs/**/*.spec.js',
            'src/**/*.js',
            { 
                pattern: 'specs/*.jpg',
                watched: false,
                served: true,
                included: false,
                nocache: false,
                type: 'image/jpeg'
            }
        ],

        proxies: {
            '/images/': '/base/specs/'
        },

        mime: {
            'image/jpeg': ['jpg', 'jpeg']
        },

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


        // preprocess matching files before serving them to the browser
        // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
        preprocessors: {
            'src/**/*.js': ['coverage', 'esbuild'],
            'specs/**/*.js': ['esbuild'],
        },


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

        coverageReporter: {
            reporters: [
                { type: 'lcovonly', subdir: '.' },
                { type: 'json', subdir: '.' },
                { type: 'html', subdir: '.' },
            ]
        },

        esbuild: {
            // Replace some global variables
            define: {
                "process.env.NODE_ENV": JSON.stringify(process.env.NODE_ENV || ""),
                ENABLE_PERFORMANCE: "true",
            },
            // Karma-esbuild specific options
            singleBundle: true, // Merge all test files into one bundle(default: true)
        },

        // 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: ['ChromeHeadless'],


        // 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
    })
}