如果JS测试失败，如何将构建标记为失败，并将构建标记为不稳定

npm install --save-dev jest

module.exports = {
  testEnvironment: 'node',
};

name: CI

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Use Node.js
      uses: actions/setup-node@v2
      with:
        node-version: '14'
    - run: npm install
    - run: npm test
      env:
        CI: true

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Use Node.js
      uses: actions/setup-node@v2
      with:
        node-version: '14'
    - run: npm install
    - run: npm test
      env:
        CI: true
    - name: Check test results
      id: check_tests
      run: |
        TEST_RESULTS=$(npm test -- --json)
        echo "::set-output name=results::$TEST_RESULTS"
    - name: Mark build as unstable
      if: contains(steps.check_tests.outputs.results, 'failures')
      run: echo "::error file=test-results.json::Test failures detected"