Code coverage: add support for e2e tests

.codecov.yml

@@ -1,6 +1,16 @@
 # Codecov Configuration
 # Reference: https://docs.codecov.com/docs/codecovyml-reference
 
+flags:
+    e2e:
+        carryforward: true # Preserve coverage data across uploads to avoid losing history
+        paths:
+            - 'assets/src/'
+    phpunit:
+        carryforward: true # Preserve coverage data across uploads to avoid losing history
+        paths:
+            - 'includes/'
+
 coverage:
     status:
         project:

.github/workflows/e2e.yml

@@ -1,42 +1,58 @@
 name: E2E Tests
 
 on:
-  pull_request:
-    branches: [trunk]
+    pull_request:
+        branches: [trunk]
 
 jobs:
-  test:
-    name: Playwright e2e Tests
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version-file: ".nvmrc"
-          cache: "npm"
-
-      - name: Install dependencies
-        run: |
-          npm ci
-          composer install --prefer-dist --no-progress
-
-      - name: Npm build
-        run: npm run build
-
-      - name: Install wp-env
-        run: npm install -g @wordpress/env
-
-      - name: Start wp-env
-        run: wp-env start
-
-      - name: Install Playwright browsers
-        run: npx playwright install --with-deps
-
-      - name: Run e2e tests
-        run: npm run test:e2e
-
-      - name: Stop wp-env
-        if: always()
-        run: wp-env stop
+    test:
+        name: Playwright e2e Tests
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Setup Node.js
+              uses: actions/setup-node@v4
+              with:
+                  node-version-file: '.nvmrc'
+                  cache: 'npm'
+
+            - name: Install dependencies
+              run: |
+                  npm ci
+                  composer install --prefer-dist --no-progress
+
+            - name: Npm build with coverage instrumentation
+              env:
+                  COVERAGE_ENABLED: true
+              run: npm run build
+
+            - name: Install wp-env
+              run: npm install -g @wordpress/env
+
+            - name: Start wp-env
+              run: wp-env start
+
+            - name: Install Playwright browsers
+              run: npx playwright install --with-deps
+
+            - name: Run e2e tests with coverage
+              run: npm run test:e2e:coverage
+
+            - name: Generate LCOV report from Istanbul coverage
+              if: always()
+              run: npm run test:e2e:coverage:report
+
+            - name: Upload E2E Coverage to Codecov
+              if: always()
+              uses: codecov/codecov-action@v5
+              with:
+                  token: ${{ secrets.CODECOV_TOKEN }}
+                  files: ./coverage/lcov.info
+                  flags: e2e
+                  slug: WordPress/secure-custom-fields
+                  name: e2e-coverage
+
+            - name: Stop wp-env
+              if: always()
+              run: wp-env stop

.github/workflows/phpunit.yml

@@ -48,3 +48,5 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: WordPress/secure-custom-fields
           files: ./coverage.xml
+          flags: phpunit
+          name: phpunit-php-${{ matrix.php }}

.gitignore

@@ -59,6 +59,10 @@ assets/build/**/*.php
 /playwright/.cache/
 /artifacts/
 
+# Code Coverage
+/coverage/
+/.nyc_output/
+
 # Claude settings
 **/.claude/settings.local.json
 

.nycrc

@@ -0,0 +1,13 @@
+{
+	"tempDir": ".nyc_output",
+	"reportDir": "./coverage",
+	"reporter": [ "html", "lcov", "text" ],
+	"include": [ "assets/src/**/*.js", "assets/src/**/*.jsx" ],
+	"exclude": [
+		"assets/src/**/*.test.js",
+		"assets/src/**/*.spec.js",
+		"assets/build/**",
+		"node_modules/**",
+		"tests/**"
+	]
+}