karma.conf.js

// Karma configuration
// Generated on Fri May 20 2022 13:13:50 GMT+0000 (Coordinated Universal Time)

require('dotenv').config();

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://www.npmjs.com/search?q=keywords:karma-adapter
        frameworks: ['jasmine'],

        client: {
            jasmine: {
                random: true,
                oneFailurePerSpec: false,
                failFast: false,
                timeoutInterval: 1000
            }
        },

        // list of files / patterns to load in the browser

        files: [
            {pattern: 'spec/javascripts/fixtures/*.html', watched: true, included: false, served: true},
            'public/test-assets/application-*.js',
            'spec/javascripts/helpers/*',
            'spec/javascripts/*_spec.js',
            'spec/javascripts/*_spec.coffee',
        ],

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

        // preprocess matching files before serving them to the browser
        // available preprocessors: https://www.npmjs.com/search?q=keywords:karma-preprocessor
        preprocessors: {
            '**/*.coffee': ['coffee']
        },

        // test results reporter to use
        // possible values: 'dots', 'progress'
        // available reporters: https://www.npmjs.com/search?q=keywords:karma-reporter
        reporters: ['spec'],

        specReporter: {
            maxLogLines: 5,             // limit number of lines logged per test
            suppressSummary: false,      // do not print summary
            suppressErrorSummary: false, // do not print error summary
            suppressFailed: false,      // do not print information about failed tests
            suppressPassed: false,      // do not print information about passed tests
            suppressSkipped: false,      // do not print information about skipped tests
            showBrowser: true,         // print the browser for each spec
            showSpecTiming: true,      // print the time elapsed for each spec
            failFast: false,             // test would finish with error when a first fail occurs
            prefixes: {
                success: '    OK: ',      // override prefix for passed tests, default is '✓ '
                failure: 'FAILED: ',      // override prefix for failed tests, default is '✗ '
                skipped: 'SKIPPED: '      // override prefix for skipped tests, default is '- '
            }
        },

        // web server port
        hostname: process.env.KARMA_HOSTNAME,
        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_WARN,

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

        // start these browsers
        // available browser launchers: https://www.npmjs.com/search?q=keywords:karma-launcher
        // Set KARMA_BROWSER environment variable to ChromeHeadless in CircleCI, ChromeSeleniumCustom in docker-compose
        browsers: [process.env.KARMA_BROWSER],

        customLaunchers: {
            ChromeSeleniumCustom: {
                base: 'Selenium',
                config: {
                    desiredCapabilities: {
                        browserName: 'chrome',
                        'goog:chromeOptions': {
                            args: ['disable-gpu', 'no-sandbox', 'window-size=1400,1400']
                        }
                    },
                    host: 'chrome',
                    port: 4444,
                    path: '/wd/hub'
                },
                name: 'Karma Test',
                browserName: 'chrome'
            }
        },

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

        // Concurrency level
        // how many browser instances should be started simultaneously
        concurrency: 1
    })
}