ci: add test coverage reporting with vitest/coverage-v8 and codecov

Author: Helweg

.github/workflows/ci.yml

@@ -58,5 +58,13 @@ jobs:
       - name: Run lint
         run: npm run lint
 
-      - name: Run tests
-        run: npm run test:run
+      - name: Run tests with coverage
+        run: npm run test:coverage
+
+      - name: Upload coverage reports
+        uses: codecov/codecov-action@v4
+        with:
+          files: ./coverage/coverage-final.json
+          fail_ci_if_error: false
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

package-lock.json

@@ -38,6 +38,7 @@
     "dev": "tsup --watch",
     "test": "vitest",
     "test:run": "vitest run",
+    "test:coverage": "vitest run --coverage",
     "lint": "eslint src/",
     "typecheck": "tsc --noEmit",
     "prepublishOnly": "npm run build"
@@ -70,6 +71,7 @@
     "@napi-rs/cli": "^3.5.1",
     "@opencode-ai/plugin": "^1.1.21",
     "@types/node": "^25.0.8",
+    "@vitest/coverage-v8": "^4.0.17",
     "eslint": "^9.0.0",
     "tsup": "^8.1.0",
     "typescript": "^5.5.0",

package.json

@@ -7,7 +7,7 @@ export default defineConfig({
     include: ["tests/**/*.test.ts"],
     coverage: {
       provider: "v8",
-      reporter: ["text", "html"],
+      reporter: ["text", "html", "json"],
       include: ["src/**/*.ts"],
       exclude: ["src/native/index.ts"],
     },