test-main.js

const allTestFiles = [];
const TEST_REGEXP = /(spec|test)\.js$/i;

if (window) {
  // eslint-disable-next-line no-underscore-dangle
  window._testEnvironment = true;
}

// Get a list of all the test files to include
Object.keys(window.__karma__.files).forEach((file) => {
  if (TEST_REGEXP.test(file)) {
  // Normalize paths to RequireJS module names.
  // If you require sub-dependencies of test files to be loaded as-is (requiring file extension)
  // then do not normalize the paths
    const normalizedTestModule = file.replace(/^\/base\/|\.js$/g, '');
    allTestFiles.push(normalizedTestModule);
  }
});

require.config({
  // Karma serves files under /base, which is the basePath from your config file
  baseUrl: '/base',

  // dynamically load all test files
  deps: allTestFiles,

  // we have to kickoff jasmine, as it is asynchronous
  callback: window.__karma__.start,
});