业力测试用例正在运行多次:角度单元测试

我不明白为什么我的因果报应测试用例在一个固定的测试用例之后会重复运行多次。

Chrome 75.0.3770(Windows 10.0.0):执行131次,共251次断开连接(1分钟9.028秒/18.285秒)

Chrome 75.0.3770(Windows 10.0.0):执行131次,共251次断开连接(47.273秒/18.169秒)

Chrome 75.0.3770(Windows 10.0.0):执行131次,共251次断开连接(1分钟9.028秒/18.285秒)

Chrome 75.0.3770(Windows 10.0.0):执行97次,共251次断开连接(22.07秒/19.87秒)

Chrome 75.0.3770(Windows 10.0.0):执行131次,共251次断开连接(1分钟9.028秒/18.285秒)

Chrome 75.0.3770(Windows 10.0.0):执行131次,共251次成功(0秒/17.406秒)

Chrome 75.0.3770(Windows 10.0.0):执行239次,共251次成功(0秒/20.912秒)

// Karma configuration file, see link for more information
// https://karma-runner.github.io/1.0/config/configuration-file.html

const { join } = require('path');
const { constants } = require('karma');

module.exports = () => {
  return {
    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
      jasmine: {
        random: false
      }
    },
    coverageIstanbulReporter: {
      dir: join(__dirname, '../../coverage'),
      reports: ['html', 'lcovonly'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: constants.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: true,
  };
};

当我将singleRun更改为false并使用ngtest执行测试用例时,它工作得很好,问题是只有当我将其更改为true时。

       browserNoActivityTimeout: 50000,
        captureTimeout: 60 * 1000,
        // captureTimeout: 210000,
        browserDisconnectTolerance: 1,
        // browserDisconnectTimeout: 210000,
        // browserNoActivityTimeout: 210000

但对我来说什么都不管用。

下面是devDependencies中的配置(我使用angular cli version 8)

 "devDependencies": {
    "@angular-devkit/build-angular": "0.800.3",
    "@angular-devkit/build-ng-packagr": "0.800.3",
    "@angular/cli": "^8.0.3",
    "@angular/compiler-cli": "~8.0.0",
    "@angular/language-service": "^6.1.0",
    "@ngrx/store-devtools": "6.0.1",
    "@nrwl/schematics": "~8.0.0",
    "@ruf/schematics": "next",
    "@ruf/wrench": "next",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^8.10.10",
    "codelyzer": "5.1.0",
    "dotenv": "6.2.0",
    "jasmine-core": "~3.4.0",
    "jasmine-marbles": "0.3.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.1.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^2.0.5",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "~1.4.2",
    "ngrx-store-freeze": "0.2.4",
    "prettier": "1.16.4",
    "protractor": "~5.3.0",
    "scss-bundle": "^2.1.2",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.4.5",
    "istanbul-instrumenter-loader": "^3.0.1",
    "karma-sourcemap-loader": "^0.3.7",
    "karma-webpack": "^3.0.4",
    "source-map-loader": "^0.2.4"
  }

请建议!!!!