add cmd test kubectl set image

hack/make-rules/test-cmd-util.sh

@@ -2836,6 +2836,10 @@ run_deployment_tests() {
   kubectl set image deployment nginx-deployment "*"="${IMAGE_DEPLOYMENT_R1}" "${kube_flags[@]}"
   kube::test::get_object_assert deployment "{{range.items}}{{$deployment_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
   kube::test::get_object_assert deployment "{{range.items}}{{$deployment_second_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
+  # Set image of all containners of the deployment again when image not change
+  kubectl set image deployment nginx-deployment "*"="${IMAGE_DEPLOYMENT_R1}" "${kube_flags[@]}"
+  kube::test::get_object_assert deployment "{{range.items}}{{$deployment_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
+  kube::test::get_object_assert deployment "{{range.items}}{{$deployment_second_image_field}}:{{end}}" "${IMAGE_DEPLOYMENT_R1}:"
   # Clean up
   kubectl delete deployment nginx-deployment "${kube_flags[@]}"