karma.conf.cjs

'use strict';
/* eslint-env node */

const commonjs = require('@rollup/plugin-commonjs');
const resolve = require('@rollup/plugin-node-resolve').nodeResolve;
const babel = require('@rollup/plugin-babel');
const webWorkerLoader = require('@pyrologic/rollup-plugin-web-worker-loader');
const path = require('path');

module.exports = function(config) {
  config.set({
    basePath: '',

    frameworks: ['mocha', 'chai-sinon'],

    client: {
      chai: {
        includeStack: true
      },
      mocha: {
        timeout: 10000
      }
    },

    files: [
      { pattern: 'test/data/4channel.wav', included: false, served: true },
      { pattern: 'test/unit/tests-browser.js', type: 'module', included: true }
    ],

    preprocessors: {
      'test/unit/tests-browser.js': ['rollup']
    },

    rollupPreprocessor: {
      plugins: [
        commonjs(),
        resolve({ browser: true }),
        webWorkerLoader(),
        babel.babel({
          babelHelpers: 'bundled',
          exclude: 'node_modules/**',
          plugins: ['istanbul']
        })
      ],
      output: {
        format: 'iife',
        name: 'WaveformData',
        sourcemap: 'inline'
      },
      onwarn: function(warning) {
        if (warning.code === 'CIRCULAR_DEPENDENCY' &&
            warning.message.indexOf(path.normalize('node_modules/chai/lib') === 0)) {
          // Chai contains circular references, but they are not fatal and can be ignored.
          return;
        }
      }
    },

    customLaunchers: {
      FirefoxHeadless: {
        base: 'Firefox',
        flags: ['-headless']
      }
    },

    reporters: ['spec', 'coverage'],

    coverageReporter: {
      reporters: [
        { type: 'html', dir: 'coverage', subdir: '.' },
        { type: 'text' },
        { type: 'text-summary' }
      ]
    },

    port: 8080,
    runnerPort: 9100,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: false,
    browsers: ['ChromeHeadless'],
    captureTimeout: 30000,
    singleRun: true
  });
};