Add codecov setting for test coverage check

.github/workflows/go.yml

@@ -47,6 +47,13 @@ jobs:
       - name: Run integration tests
         run: |
           make docker-test-integration
+      - name: Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: cover.out
+          flags: unit-tests
+          name: codecov-unit-test
 
   tidy:
     runs-on: [ubuntu-latest]

Makefile

@@ -37,7 +37,7 @@ test-integration:
 	@echo
 	@echo "==> Running integration tests <=="
 	@echo "SOME TESTS WILL FAIL IF NOT RUN AS ROOT!"
-	$(GO) test antrea.io/ofnet/ofctrl/...
+	$(GO) test antrea.io/ofnet/ofctrl/... -v -coverprofile cover.out
 
 .PHONY: docker-test-integration
 docker-test-integration:
@@ -54,7 +54,7 @@ endif
 		-w /usr/src/antrea.io/ofnet \
 		-v $(DOCKER_CACHE)/gopath:/tmp/gopath \
 		-v $(DOCKER_CACHE)/gocache:/tmp/gocache \
-		-v $(CURDIR):/usr/src/antrea.io/ofnet:ro \
+		-v $(CURDIR):/usr/src/antrea.io/ofnet \
 		-v /lib/modules:/lib/modules \
 		ofnet/test test-integration $(USERID) $(GRPID)
 

codecov.yaml

@@ -0,0 +1,35 @@
+codecov:
+  branch: main
+  require_ci_to_pass: no
+
+comment:
+  layout: "reach,diff,flags,tree"
+  behavior: default
+  require_changes: no
+  require_base: no
+  require_head: no
+  after_n_builds: 1
+  show_carryforward_flags: true
+
+github_checks:
+  annotations: true
+
+coverage:
+  status:
+    patch:
+      default:
+        target: 70%
+        threshold: 5%
+        base: auto
+        only_pulls: false
+    project:
+      default:
+        target: auto
+        threshold: 0.3%
+
+flag_management:
+  default_rules:
+    carryforward: true
+
+ignore:
+  - "**/testing/*.go"