测试lit元素应用程序时发生gitlab错误

我将Gitlab用作项目的CI/CD工具，在尝试运行测试时出现以下错误：

> pwa-starter-kit@0.9.0 test:unit /builds/jperera84/prop-mgm-app
> polymer test --module-resolution=node --npm


Error: No browsers configured to run

error:  cli runtime exception: Error: No browsers configured to run error:  Error: No browsers configured to run
    at Object.<anonymous> (/builds/jperera84/prop-mgm-app/node_modules/polymer-cli/node_modules/web-component-tester/runner/config.js:518:19)
    at Generator.next (<anonymous>)
    at /builds/jperera84/prop-mgm-app/node_modules/polymer-cli/node_modules/web-component-tester/runner/config.js:20:71
    at new Promise (<anonymous>)
    at __awaiter (/builds/jperera84/prop-mgm-app/node_modules/polymer-cli/node_modules/web-component-tester/runner/config.js:16:12)
    at Object.validate (/builds/jperera84/prop-mgm-app/node_modules/polymer-cli/node_modules/web-component-tester/runner/config.js:506:12)
    at Object.<anonymous> (/builds/jperera84/prop-mgm-app/node_modules/polymer-cli/node_modules/web-component-tester/runner/steps.js:64:22)
    at Generator.next (<anonymous>)
    at fulfilled (/builds/jperera84/prop-mgm-app/node_modules/polymer-cli/node_modules/web-component-tester/runner/steps.js:4:58)
    at processTicksAndRejections (internal/process/task_queues.js:93:5) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! pwa-starter-kit@0.9.0 test:unit: `polymer test
--module-resolution=node --npm` npm ERR! Exit status 1 npm ERR!  npm ERR! Failed at the pwa-starter-kit@0.9.0 test:unit script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in: npm ERR!     /root/.npm/_logs/2019-10-12T00_10_45_442Z-debug.log npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! pwa-starter-kit@0.9.0 test: `npm run test:unit && npm run test:integration` npm ERR! Exit status 1 npm ERR!  npm ERR! Failed at the pwa-starter-kit@0.9.0 test script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in: npm ERR!     /root/.npm/_logs/2019-10-12T00_10_45_483Z-debug.log ERROR: Job failed: exit code 1

这是一个基本上运行初学者工具包的Lit元素项目

有人能帮我找到一个可能的解决办法吗

---

谢谢

看起来你需要建立自己的形象。从node:latest（基于Debian）开始，添加Chromium/Firefox。

这里的错误非常简单：“错误：没有配置运行的浏览器”--可能浏览器应该安装在容器中才能在无头模式下工作？谢谢@Janusz我完全同意你的意见，我理解问题是浏览器没有安装，我的问题是，如果以前有人这样做过，请帮助我找到安装浏览器的正确配置。

image: node:latest

variables:
  LAUNCHPAD_FIREFOX: /usr/local/bin/firefox
  LAUNCHPAD_CHROME: /usr/bin/chromium-browser

stages:
  - build
  - test

cache:
  paths:
    - node_modules/

install_dependencies:
  stage: build
  script:
    - npm install
  artifacts:
    paths:
      - node_modules/

testing_integration:
  stage: test
  script:
    - npm run test