karma.global.js

/* eslint-disable import/no-extraneous-dependencies */
const babel = require('@rollup/plugin-babel').default;
const json = require('@rollup/plugin-json');
const resolve = require('@rollup/plugin-node-resolve').default;
const nodePolyfills = require('rollup-plugin-node-polyfills');
const commonjs = require('@rollup/plugin-commonjs');

module.exports = (config) => ({
  // 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: ['tap'],

  // list of files / patterns to load in the browser
  files: [
    {
      pattern: 'test/index.test.js',
      watched: false,
    },
  ],

  // 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: {
    'test/index.test.js': ['rollup'], // TODO: re-enable sourcemap?
  },

  // see: https://github.com/jlmakes/karma-rollup-preprocessor
  rollupPreprocessor: {
    output: {
      format: 'iife', // Helps prevent naming collisions.
      name: 'confluxTest', // Required for 'iife' format.
      sourcemap: 'inline', // Sensible for testing.
      file: 'dist/test2.js',
    },
    plugins: [
      resolve({
        preferBuiltins: true,
      }),
      commonjs(),
      json(),
      nodePolyfills(),
      babel({
        exclude: ['node_modules/**'],
        // see: https://github.com/rollup/plugins/tree/master/packages/babel#babelhelpers and the note about @babel/runtime for CJS/ES
        configFile: './babel.config.js',
      }),
    ],
  },

  // browserNoActivityTimeout: 60000,

  plugins: ['karma-rollup-preprocessor', 'karma-tap', 'karma-coverage'],

  reporters: ['progress', 'coverage'],

  coverageReporter: {
    reporters: [{ type: 'lcov' }],
  },

  // web server port
  port: 9877,

  // 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: false,

  // 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: 5,
});