运行角度测试时未加载小叶窗口元素“ L”

Question

我正在测试使用传单的自定义地图组件。在测试组件传单'L'元素在窗口对象中不可用时。

在调试时，Leaflet js文件已正确加载，但未存储在obj窗口中。

我的angular.json文件

"test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "karmaConfig": "./karma.conf.js",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.spec.json",
            "scripts": [
              "node_modules/leaflet/dist/leaflet.js",
              "node_modules/leaflet-control-geocoder/dist/Control.Geocoder.js",
              "node_modules/leaflet-routing-machine/dist/leaflet-routing-machine.js",
              "node_modules/lrm-here/dist/lrm-here.js",
              "node_modules/leaflet-rotatedmarker/leaflet.rotatedMarker.js"
            ],
            "styles": [
              "src/scss/styles.scss",
              "node_modules/leaflet/dist/leaflet.css",
              "node_modules/leaflet-routing-machine/dist/leaflet-routing-machine.css"
            ],
            "assets": [
              "src/assets",
              "src/favicon.ico"
            ]
          }
 }

karma.ts文件

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular-devkit/build-angular/plugins/karma')
    ],
    client:{
      clearContext: false // leave Jasmine Spec Runner output visible in browser
    },
    mime: {
      'text/x-typescript': ['ts','tsx']
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, 'coverage'), reports: [ 'html', 'lcovonly' ],
      fixWebpackSourcePaths: true
    },
    reporters: config.angularCli && config.angularCli.codeCoverage ? ['progress', 'coverage-istanbul'] : ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false
  });
};