coverage.yaml

name: "Test Coverage Check"

on:
  pull_request:
  push:
  workflow_dispatch:

jobs:
  coverage:
    name: Test Coverage
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout Code
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod
          cache: true

      - name: Run Tests with Coverage
        run: |
          CORE_PACKAGES=$(go list ./... | grep -Ev '/(cmd|mocks|tests)$')
          go test -coverprofile=coverage.out -covermode=atomic $CORE_PACKAGES
        continue-on-error: true

      - name: Generate Coverage Report
        id: coverage
        run: |
          CORE_PACKAGES=$(go list ./... | grep -Ev '/(cmd|mocks|tests)$')

          # Get overall coverage
          OVERALL=$(go tool cover -func=coverage.out | grep total | awk '{print $3}' | sed 's/%//')
          echo "overall=$OVERALL" >> $GITHUB_OUTPUT
          
          # Generate detailed report
          echo "## Test Coverage Report" > coverage-report.md
          echo "" >> coverage-report.md
          echo "**Overall Coverage:** ${OVERALL}%" >> coverage-report.md
          echo "" >> coverage-report.md
          echo "### Package Coverage" >> coverage-report.md
          echo "" >> coverage-report.md
          echo "| Package | Coverage |" >> coverage-report.md
          echo "|---------|----------|" >> coverage-report.md
          
          # Extract package coverage
          go test -coverprofile=/dev/null -covermode=atomic $CORE_PACKAGES 2>&1 | \
            awk '/^ok[[:space:]]/ {
              pkg=$2;
              cov=$5;
              gsub(/github.com\/calypr\/calypr-cli\//, "", pkg);
              print "| " pkg " | " cov " |"
            }' >> coverage-report.md
          
          cat coverage-report.md

      - name: Check Coverage Thresholds
        run: |
          set -euo pipefail

          CORE_PACKAGES=$(go list ./... | grep -Ev '/(cmd|mocks|tests)$')

          OVERALL=$(go tool cover -func=coverage.out | awk '/^total:/ {gsub(/%/, "", $3); print $3}')
          if ! awk -v val="$OVERALL" -v min=30 'BEGIN { if (val + 0 < min) exit 1; exit 0 }'; then
            echo "Overall coverage ${OVERALL}% is below the required minimum of 30%"
            exit 1
          fi

          while read -r pkg cov; do
            cov=${cov%%%}
            if ! awk -v val="$cov" -v min=20 'BEGIN { if (val + 0 < min) exit 1; exit 0 }'; then
              echo "Package ${pkg} coverage ${cov}% is below the required minimum of 20%"
              exit 1
            fi
          done < <(
            go test -coverprofile=/dev/null -covermode=atomic $CORE_PACKAGES 2>&1 | \
              awk '/^ok[[:space:]]/ {
                pkg=$2;
                cov=$5;
                gsub(/github.com\/calypr\/calypr-cli\//, "", pkg);
                print pkg, cov
              }'
          )

      - name: Upload Coverage to Codecov (Optional)
        uses: codecov/codecov-action@v4
        if: always()
        with:
          files: ./coverage.out
          flags: unittests
          name: codecov-umbrella
          fail_ci_if_error: false
        env:
          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

      - name: Comment PR with Coverage
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const coverage = fs.readFileSync('coverage-report.md', 'utf8');
            
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: coverage
            });

      - name: Upload Coverage Artifact
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: coverage-report
          path: |
            coverage.out
            coverage-report.md
          retention-days: 30