add code coverage

Author: TristanSpeakEasy

.github/workflows/test.yaml

@@ -9,25 +9,77 @@ on:
 jobs:
   test-and-build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: "1.23"
 
       - name: Install dependencies
         run: go mod download
 
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v6
         with:
           version: latest
 
-      - name: Run tests
-        run: go test -v ./...
+      - name: Run tests with coverage
+        run: |
+          go test -v -race -coverprofile=coverage.out -covermode=atomic ./...
+          go tool cover -html=coverage.out -o coverage.html
+
+      - name: Calculate coverage
+        id: coverage
+        run: |
+          COVERAGE=$(go tool cover -func=coverage.out | grep total | awk '{print $3}')
+          echo "coverage=$COVERAGE" >> $GITHUB_OUTPUT
+          echo "Coverage: $COVERAGE"
+
+      - name: Generate coverage summary
+        id: coverage-summary
+        run: |
+          echo "## 📊 Test Coverage Report" > coverage-summary.md
+          echo "" >> coverage-summary.md
+          echo "**Overall Coverage:** \`${{ steps.coverage.outputs.coverage }}\`" >> coverage-summary.md
+          echo "" >> coverage-summary.md
+          echo "### Coverage by Package" >> coverage-summary.md
+          echo "\`\`\`" >> coverage-summary.md
+          go tool cover -func=coverage.out >> coverage-summary.md
+          echo "\`\`\`" >> coverage-summary.md
+          echo "" >> coverage-summary.md
+          echo "- 🧪 All tests passed" >> coverage-summary.md
+          echo "- 📈 Full coverage report available in workflow artifacts" >> coverage-summary.md
+          echo "" >> coverage-summary.md
+          echo "_Generated by GitHub Actions_" >> coverage-summary.md
+
+      - name: Comment PR with coverage
+        if: github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const coverageSummary = fs.readFileSync('coverage-summary.md', 'utf8');
+            
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: coverageSummary
+            });
+
+      - name: Upload coverage artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-report
+          path: |
+            coverage.out
+            coverage.html
 
       - name: Build
         run: go build -v ./...