Add Codecov integration for unit test coverage

.codecov.yml

@@ -0,0 +1,24 @@
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 1%
+    patch:
+      default:
+        target: auto
+        threshold: 1%
+
+flags:
+  unit:
+    paths:
+      - "!test/e2e/"
+      - "!examples/openshift/tests/e2e/"
+  e2e-kustomize:
+    paths:
+      - "!test/e2e/"
+
+comment:
+  layout: "reach,diff,flags,files"
+  behavior: default
+

.github/workflows/codecov.yaml

@@ -0,0 +1,31 @@
+name: Codecov Coverage
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  upload-coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source code
+        uses: actions/checkout@v5.0.0
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
+
+      - name: Run unit tests
+        run: make unit-test
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@75cd11691c0faa626561e295848008c8a7dddffe # v5
+        with:
+          files: cover.out
+          flags: unit
+          token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/kustomize-e2e.yaml

@@ -85,6 +85,14 @@ jobs:
         env:
           SPARK_OPERATOR_IMAGE: ghcr.io/kubeflow/spark-operator/controller:local
 
+      - name: Upload e2e coverage to Codecov
+        if: always()
+        uses: codecov/codecov-action@75cd11691c0faa626561e295848008c8a7dddffe # v5
+        with:
+          files: cover-e2e-kustomize.out
+          flags: e2e-kustomize
+          token: ${{ secrets.CODECOV_TOKEN }}
+
       - name: Debug - Show cluster state
         if: failure()
         run: |

.gitignore

@@ -1,7 +1,6 @@
 .idea/
 .vscode/
 bin/
-codecov.yaml
 cover.out
 cover.html
 .DS_Store

examples/openshift/Makefile

@@ -81,7 +81,7 @@ test-docling-spark: ## Run Docling Spark test on KIND or OpenShift.
 .PHONY: e2e-kustomize-test
 e2e-kustomize-test: ## Run Go e2e tests using Kustomize manifests for operator installation.
 	@echo "Running Go e2e tests with Kustomize installation..."
-	cd $(REPO_ROOT) && INSTALL_METHOD=kustomize go test ./examples/openshift/tests/e2e/ -v -ginkgo.v -timeout 30m
+	cd $(REPO_ROOT) && INSTALL_METHOD=kustomize go test ./examples/openshift/tests/e2e/ -v -ginkgo.v -timeout 30m -coverprofile cover-e2e-kustomize.out
 
 .PHONY: test-all
 test-all: ## Run all tests (operator-install, spark-pi, docling).