chore: add Codecov Test Analytics (#84) (#86)

- Add jest-junit reporter for JUnit XML output
- Update CI workflow to upload test results to Codecov
- Enables flaky test detection and test performance tracking

Stu Mason + AI <me@stumason.dev>

Author: StuMason

.github/workflows/ci.yml

@@ -50,3 +50,12 @@ jobs:
           files: ./coverage/lcov.info
           fail_ci_if_error: false
           verbose: true
+
+      - name: Upload test results to Codecov
+        if: matrix.node-version == '20.x'
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage/junit.xml
+          fail_ci_if_error: false
+          verbose: true

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- **Codecov Test Analytics** - Enable test result tracking (#84):
+  - Added `jest-junit` reporter for JUnit XML output
+  - CI workflow now uploads test results to Codecov
+  - Enables flaky test detection and test performance tracking
+
 ### Fixed
 
 - **Deployment Logs Massive Payload** - Add character-based truncation (#82):

jest.config.js

@@ -24,6 +24,16 @@ export default {
   ],
   coverageDirectory: 'coverage',
   coverageReporters: ['text', 'text-summary', 'lcov'],
+  reporters: [
+    'default',
+    [
+      'jest-junit',
+      {
+        outputDirectory: 'coverage',
+        outputName: 'junit.xml',
+      },
+    ],
+  ],
   coverageThreshold: {
     global: {
       statements: 80,

package-lock.json

@@ -59,6 +59,7 @@
     "globals": "^17.0.0",
     "husky": "^9.0.11",
     "jest": "^29.7.0",
+    "jest-junit": "^16.0.0",
     "lint-staged": "^16.2.7",
     "markdownlint-cli2": "^0.20.0",
     "prettier": "^3.5.3",