How do you integrate Postman collections with CI/CD pipelines?

1. Write API tests in Postman
2. Export collection + environment files
3. Commit JSON files to Git repository
4. CI/CD pipeline runs Newman
5. Newman generates test reports (JUnit XML, HTML)
6. CI reads test results and marks build pass/fail

# .github/workflows/api-tests.yml
name: API Tests

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  api-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Install Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'

      - name: Install Newman
        run: |
          npm install -g newman
          npm install -g newman-reporter-html

      - name: Run API Tests
        run: |
          newman run postman/collection.json \
            -e postman/staging.json \
            --reporters cli,junit,html \
            --reporter-junit-export results/junit.xml \
            --reporter-html-export results/report.html

      - name: Upload Test Report
        uses: actions/upload-artifact@v3
        if: always()
        with:
          name: api-test-reports
          path: results/

// Jenkinsfile
pipeline {
    agent any
    stages {
        stage('API Tests') {
            steps {
                sh '''
                    npm install -g newman newman-reporter-html
                    newman run collection.json \
                      -e staging.json \
                      --reporters junit \
                      --reporter-junit-export results/newman.xml
                '''
            }
        }
    }
    post {
        always {
            junit 'results/newman.xml'
        }
    }
}

api-tests:
  image: node:18
  script:
    - npm install -g newman
    - newman run collection.json -e environment.json --reporters cli,junit --reporter-junit-export results.xml
  artifacts:
    reports:
      junit: results.xml