karma-test-shim.js

// Turn on full stack traces in errors to help debugging
Error.stackTraceLimit=Infinity;

jasmine.DEFAULT_TIMEOUT_INTERVAL = 100;

// Cancel Karma's synchronous start,
// we will call `__karma__.start()` later, once all the specs are loaded.
__karma__.loaded = function() {};

System.config({
  packages: {
    'base/src': {
      defaultJSExtensions: true
    },
    'base/test-built/src': {
      defaultJSExtensions: true
    }
  }
});

//loading systemjs for angular to use in tests
System.import('base/karma-systemjs-config.js').then(function() {
  return Promise.all([
    System.import('@angular/core/testing'),
    System.import('@angular/platform-browser-dynamic/testing')
  ]).then(function (providers) {
    var testing = providers[0];
    var testingBrowser = providers[1];

    testing.setBaseTestProviders(testingBrowser.TEST_BROWSER_DYNAMIC_PLATFORM_PROVIDERS,
      testingBrowser.TEST_BROWSER_DYNAMIC_APPLICATION_PROVIDERS);
  });
}).then(function() {
        return Promise.all(
            Object.keys(window.__karma__.files) // All files served by Karma.
                .filter(onlySpecFiles)
                .map(file2moduleName)
                .map(function(path) {
                    return System.import(path).then(function(module) {
                        if (module.hasOwnProperty('main')) {
                            module.main();
                        } else {
                            throw new Error('Module ' + path + ' does not implement main() method.');
                        }
                    });
                }));
    })
    .then(function() {
        __karma__.start();
    }, function(error) {
        console.error(error.stack || error);
        __karma__.start();
    });


function onlySpecFiles(path) {
    return /[\.|_]spec\.js$/.test(path);
}

// Normalize paths to module names.
function file2moduleName(filePath) {
    return filePath.replace(/\\/g, '/');
}