当前，我正在尝试在Angular 5项目上运行单元测试，并且它不断为下面提到的各种文件引发错误“找不到模块”，我试图删除node_modules，然后再次完成install但是错误仍然相同。我在尝试同时运行两个选项（即ng e2e和ng test）时遇到了这个问题。
ERROR in ./node_modules/saucelabs/index.js
Module not found: Error: Can't resolve './lib-cov/SauceLabs' in 'C:\development\web-project\frontend\web\src\main\angular\node_modules\saucelabs'
ERROR in ./node_modules/protractor/built/bpRunner.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\protractor\built'
ERROR in ./node_modules/protractor/built/runner.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\protractor\built'
ERROR in ./node_modules/protractor/built/debugger.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\protractor\built'
ERROR in ./node_modules/selenium-webdriver/firefox/binary.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\selenium-webdriver\firefox'
ERROR in ./node_modules/selenium-webdriver/io/exec.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\selenium-webdriver\io'
ERROR in ./node_modules/selenium-webdriver/net/portprober.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\selenium-webdriver\net'
ERROR in ./node_modules/webdriver-js-extender/node_modules/selenium-webdriver/firefox/binary.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\webdriver-js-extender\node_modules\selenium-webdriver\firefox'
ERROR in ./node_modules/webdriver-js-extender/node_modules/selenium-webdriver/io/exec.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\webdriver-js-extender\node_modules\selenium-webdriver\io'
ERROR in ./node_modules/webdriver-js-extender/node_modules/selenium-webdriver/net/portprober.js
Module not found: Error: Can't resolve 'child_process' in 'C:\development\web-project\frontend\web
d-web\src\main\angular\node_modules\webdriver-js-extender\node_modules\selenium-webdriver\net'
ERROR in ./node_modules/protractor/built/debugger.js
Module not found: Error: Can't resolve 'repl' in 'C:\development\web-project\frontend\web\src
\main\angular\node_modules\protractor\built'
ERROR in ./node_modules/blocking-proxy/built/lib/bin.js
Module parse failed: Unexpected character '#' (1:0)
You may need an appropriate loader to handle this file type.
| #!/usr/bin/env node
| "use strict";
| Object.defineProperty(exports, "__esModule", { value: true });
我已经验证了saucelabs下的node_modules文件夹，看来还可以。
这是我在Windows 7计算机上安装的软件包：
Angular CLI: 1.7.4
Node: 6.9.1
OS: win32 x64
Angular: 5.2.11
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router, service-worker
@angular/cdk: 5.2.5
@angular/cli: 1.7.4
@angular-devkit/build-optimizer: 0.3.2
@angular-devkit/core: 0.3.2
@angular-devkit/schematics: 0.3.2
@ngtools/json-schema: 1.2.0
@ngtools/webpack: 1.10.2
@schematics/angular: 0.3.2
@schematics/package-update: 0.3.2
typescript: 2.4.2
webpack: 3.11.0
我尝试了很多搜索，但是没有找到任何直接的解决方案。例如，发布在github https://github.com/travis-ci/travis-ci/issues/7858上的这个问题与我有点相似，但这并没有为这个问题提供任何具体的解决方案。
如果有人可以帮助我理解该问题以及如何解决该问题，那么我将非常感谢您。
谢谢！