Add Codecov integration for unit test coverage

Signed-off-by: Dev Kumar <dkuma@redhat.com>

Author: deekay2310

.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/"
+  # e2e: reserved for future use when e2e coverage reporting is enabled
+  # e2e:
+  #   paths:
+  #     - test/e2e/
+
+comment:
+  layout: "reach,diff,flags,files"
+  behavior: default
+

.github/workflows/integration.yaml

@@ -116,6 +116,13 @@ jobs:
       - name: Run go unit tests
         run: make unit-test
 
+      - name: Upload unit test coverage to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          files: cover-unit.out
+          flags: unit
+          token: ${{ secrets.CODECOV_TOKEN }}
+
       - name: Build Spark operator
         run: make build-operator
 

Makefile

@@ -162,9 +162,9 @@ go-lint-fix: golangci-lint ## Run golangci-lint linter and perform fixes.
 unit-test: setup-envtest ## Run unit tests.
 	@echo "Running unit tests..."
 	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)"
-	go test $(shell go list ./... | grep -v /e2e) -coverprofile cover.out
+	go test $(shell go list ./... | grep -v /e2e) -coverprofile cover-unit.out
 	@echo "Generating HTML coverage report..."
-	go tool cover -html=cover.out -o cover.html
+	go tool cover -html=cover-unit.out -o cover.html
 	@echo "Coverage report available at cover.html"
 
 .PHONY: e2e-test

README.md

@@ -1,6 +1,7 @@
 # Kubeflow Spark Operator
 
 [![GitHub release](https://img.shields.io/github/v/release/kubeflow/spark-operator)](https://github.com/kubeflow/spark-operator/releases)
+[![codecov](https://codecov.io/gh/kubeflow/spark-operator/branch/main/graph/badge.svg)](https://codecov.io/gh/kubeflow/spark-operator)
 [![Go Report Card](https://goreportcard.com/badge/github.com/kubeflow/spark-operator)](https://goreportcard.com/report/github.com/kubeflow/spark-operator)
 [![Integration Test](https://github.com/kubeflow/spark-operator/actions/workflows/integration.yaml/badge.svg)](https://github.com/kubeflow/spark-operator/actions/workflows/integration.yaml)
 [![Join Slack](https://img.shields.io/badge/Join_Slack-blue?logo=slack)](https://www.kubeflow.org/docs/about/community/#kubeflow-slack-channels)