Write tests for controllers using scaffolded test framework

[Vajira Prabuddhaka]

I have a kubernetes controller developed using kubebuilder. Now I'm writing tests for my controller. I saw that it uses envtest (https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/envtest) library for running a k8s server and etcd. 

In this setup, I want to test some reconciling logic for non 404 responses from the k8s API server. How do you do this? Is there a way to set this client to return such responses (for that particular test).

Thanks.