karma-test-shim.js

// /*global jasmine, __karma__, window*/
Error.stackTraceLimit = 0; // "No stacktrace"" is usually best for testing.

// Uncomment to get full stacktrace output. Sometimes helpful, usually not.
// Error.stackTraceLimit = Infinity; //

jasmine.DEFAULT_TIMEOUT_INTERVAL = 1000;

// builtPaths: root paths for output ("built") files
// get from karma.config.js, then prefix with '/base/' (default is 'src/')
var builtPaths = (__karma__.config.builtPaths || ['src/'])
                 .map(function(p) { return '/base/'+p;});

__karma__.loaded = function () { };

function isJsFile(path) {
  return path.slice(-3) == '.js';
}

function isSpecFile(path) {
  return /\.spec\.(.*\.)?js$/.test(path);
}

// Is a "built" file if is JavaScript file in one of the "built" folders
function isBuiltFile(path) {
  return isJsFile(path) &&
         builtPaths.reduce(function(keep, bp) {
           return keep || (path.substr(0, bp.length) === bp);
         }, false);
}

var allSpecFiles = Object.keys(window.__karma__.files)
  .filter(isSpecFile)
  .filter(isBuiltFile);

System.config({
  paths: {
    // paths serve as alias
    'npm:': 'node_modules/'
  },
  // Base URL for System.js calls. 'base/' is where Karma serves files from.
  baseURL: 'base/src/lib',
  // Extend usual application package list with test folder
  packages: {
    rxjs: { defaultExtension: 'js' },
    'rxjs/operators': {
      defaultExtension: 'js',
      main: 'index'
    },
    '': { defaultExtension: 'js' },
    src: {
        defaultExtension: 'js',
        meta: {
          './*.js': {
            loader: 'system-loader'
          }
        }
      }
  },
  // Map the angular umd bundles
  map: {
    'system-loader': 'demo/systemjs-angular-loader.js',
    '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
    '@angular/common/http': 'npm:@angular/common/bundles/common-http.umd.js',
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',

    // Testing bundles
    '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
    '@angular/common/http/testing': 'npm:@angular/common/bundles/common-http-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
    '@angular/forms/testing': 'npm:@angular/forms/bundles/forms-testing.umd.js',

    'rxjs': 'npm:rxjs',
    'tslib': 'npm:tslib/tslib.js',
    'src': 'src'
  }
});

initTestBed().then(initTesting);

function initTestBed(){
  return Promise.all([
    System.import('@angular/core/testing'),
    System.import('@angular/platform-browser-dynamic/testing')
  ])

  .then(function (providers) {
    var coreTesting    = providers[0];
    var browserTesting = providers[1];

    coreTesting.TestBed.initTestEnvironment(
      browserTesting.BrowserDynamicTestingModule,
      browserTesting.platformBrowserDynamicTesting());
  })
}

// Import all spec files and start karma
function initTesting () {
  return Promise.all(
    allSpecFiles.map(function (moduleName) {
      return System.import(moduleName);
    })
  )
  .then(__karma__.start, __karma__.error);
}