angularjs – 已覆盖ZoneAwarePromise

“错误：Zone.js检测到ZoneAwarePromise'(窗口|全局).Promise’已被覆盖.
最有可能的原因是在Zone.js之后加载了Promise polyfill(在加载zone.js时不需要Polyfilling Promise api.如果必须在node_modules / zone.js /中加载一个,请在加载zone.js之前加载). dist / zone.js(第21行)“

我能想到的最接近的事情是我在单元测试中通过手动返回observable来模拟来自http调用的响应.

这是一个使用Jasmine和Karma进行单元测试的Angular2应用程序.

UPDATE
因此,根据错误消息,这似乎可能是一个加载订单问题,但是我没有在我可以确定的任何地方加载polyfill,除非我不小心抓住它们.我已经附加了我的karma.conf.js和systemjs.conf.js来帮助找到错误.

Karma.conf.js

module.exports = function(config) {
  var gulpConfig = require('../gulp/config')();

  /**
   * List of npm packages that imported via `import` Syntax
   */
  var dependencies = [
    '@angular','lodash','rxjs'
  ];

  var configuration = {
    basePath: '../../',browserNoActivityTimeout: 20000,frameworks: ['jasmine'],browsers: ['PhantomJS'],reporters: ['progress','coverage'],preprocessors: {},// Generate json used for remap-istanbul
    coverageReporter: {
      includeAllSources: true,dir: 'coverage/appCoverage/remap/',reporters: [
        { type: 'json',subdir: 'report-json' }
      ]
    },files: [
      'node_modules/reflect-Metadata/Reflect.js','node_modules/zone.js/dist/zone.js','node_modules/zone.js/dist/long-stack-trace-zone.js','node_modules/zone.js/dist/proxy.js','node_modules/zone.js/dist/sync-test.js','node_modules/zone.js/dist/jasmine-patch.js','node_modules/zone.js/dist/async-test.js','node_modules/zone.js/dist/fake-async-test.js','node_modules/angular/angular.js','node_modules/core-js/client/shim.min.js','node_modules/systemjs/dist/system.src.js'
    ],// proxied base paths
    proxies: {
      // required for component assests fetched by Angular's compiler
      "/src/": "/base/src/","/app/": "/base/src/app/","/node_modules/": "/base/node_modules/"
    },port: 9876,colors: true,logLevel: config.LOG_INFO,autoWatch: true,//browserNoActivityTimeout: 100000
  };

  configuration.preprocessors[gulpConfig.tmpApp + '**/!(*.spec)+(.js)'] = ['coverage'];
  configuration.preprocessors[gulpConfig.tmpApp + '**/*.js'] = ['sourcemap'];
  configuration.preprocessors[gulpConfig.tmpTest + '**/*.js'] = ['sourcemap'];

  var files = [
    gulpConfig.tmpTest + 'test-helpers/global/**/*.js',gulpConfig.src + 'systemjs.conf.js','config/test/karma-test-shim.js',createFilePattern(gulpConfig.tmpApp + '**/*.js',{ included: false }),createFilePattern(gulpConfig.tmpTest + 'test-helpers/*.js',createFilePattern(gulpConfig.app + '**/*.html',createFilePattern(gulpConfig.app + '**/*.css',createFilePattern(gulpConfig.app + '**/*.ts',{ included: false,watched: false }),createFilePattern(gulpConfig.tmpApp + '**/*.js.map',watched: false })
  ];

  configuration.files = configuration.files.concat(files);

  dependencies.forEach(function(key) {
    configuration.files.push({
        pattern: 'node_modules/' + key + '/**/*.js',included: false,watched: false
    });
  });

  if (process.env.APPVEYOR) {
    configuration.browsers = ['IE'];
    configuration.singleRun = true;
    configuration.browserNoActivityTimeout = 90000; // Note: default value (10000) is not enough
  }

  config.set(configuration);

  // Helpers
  function createFilePattern(path,config) {
    config.pattern = path;
    return config;
  }
}

UPDATE
我的解决方案涉及确保我的所有zone.js文件最后都在karma.conf.js中加载.我猜测我包含的其他东西也包括polyfill,但是在zone.js之后加载,所以引发了错误.将zone.js移动到最后,一切正常.