Angular 角度测试：中出错，必须有要重构的源文件

我正在尝试运行

ng test

并收到此错误。我怎样才能解决这个问题？甚至不知道这意味着什么

中的错误必须具有要重构的源文件

---

签出angular.json文件并查看构建和测试对象的路径 像

---

如果这不起作用，则共享代码

当源文件（本例中为test.ts文件）在angular.json中提到的路径中丢失时，会发生此错误

---

重新检查angular.json文件中提到的test.ts的路径。

您可以尝试完全重新安装节点模块-这对我来说很有效

npm ci

To disable this warning use "ng config -g cli.warnings.versionMismatch false".
Browserslist: caniuse-lite is outdated. Please run next command `npm update`
10% building 3/3 modules 0 active07 01 2020 21:25:31.477:WARN [karma]: No captured browser, open http://localhost:9877/
07 01 2020 21:25:31.537:INFO [karma-server]: Karma v4.1.0 server started at http://0.0.0.0:9877/
07 01 2020 21:25:31.538:INFO [launcher]: Launching browsers Chrome with concurrency unlimited
07 01 2020 21:25:31.551:INFO [launcher]: Starting browser Chrome

ERROR in Must have a source file to refactor.
07 01 2020 21:25:54.710:INFO [Chrome 79.0.3945 (Windows 10.0.0)]: Connected on socket with id 
Chrome 79.0.3945 (Windows 10.0.0): Executed 0 of 0 ERROR (0.008 secs / 0 secs)
Chrome 79.0.3945 (Windows 10.0.0): Executed 0 of 0 ERROR (0.008 secs / 0 secs)

"test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.spec.json",
            "karmaConfig": "src/karma.conf.js",
            "styles": ["src/styles.css"],
            "scripts": [],
            "assets": ["src/favicon.ico", "src/assets"]
          }
        },