karma.conf.js

module.exports = function(config) {
  config.set({
    frameworks: ['mocha', 'karma-typescript'],
    files: ['src/**/*.ts', 'test/**/*.spec.ts'],
    preprocessors: {
      '**/*.ts': ['karma-typescript'],
    },
    plugins: ['karma-mocha', 'karma-typescript', 'karma-chrome-launcher', 'karma-firefox-launcher'],
    karmaTypescriptConfig: {
      tsconfig: './tsconfig.json',
      bundlerOptions: {
        entrypoints: /\.spec\.ts$/,
        acornOptions: {
          ecmaVersion: 11
        }
      },
    },
    colors: true,
    reporters: ['progress', 'karma-typescript'],
    browsers: ['FirefoxHeadless', 'ChromeHeadless'],
    singleRun: true,
    concurrency: 1,
    // Extend timeouts for long tests
    browserDisconnectTimeout: 1000000,
    browserNoActivityTimeout: 1000000,
  })
}