in integration test - validate the exit code

test/integration/net_test.go

@@ -29,6 +29,7 @@ import (
 	"time"
 
 	"k8s.io/minikube/pkg/kapi"
+	"k8s.io/minikube/pkg/minikube/reason"
 	"k8s.io/minikube/pkg/util/retry"
 )
 
@@ -213,6 +214,10 @@ func validateFalseCNI(ctx context.Context, t *testing.T, profile string) {
 	if err == nil {
 		t.Errorf("%s expected to fail", mkCmd)
 	}
+	if rr.ExitCode != reason.Usage.ExitCode {
+		t.Errorf("Expected %d exit code, got %d", reason.Usage.ExitCode, rr.ExitCode)
+
+	}
 	expectedMsg := fmt.Sprintf("The %q container runtime requires CNI", cr)
 	if !strings.Contains(rr.Output(), expectedMsg) {
 		t.Errorf("Expected %q line not found in output %s", expectedMsg, rr.Output())