Struct fakeExister

usecases/auth/authentication/oidc/middleware_test.go:413–416

fakeExister is a minimal namespaces.Exister stub for classifyPrincipal matrix testing. Names in `known` are active; names in `deleting` exist but are not active.

// matrix testing. Names in `known` are active; names in `deleting` exist
// but are not active.
type fakeExister struct {
	known    map[string]struct{}
	deleting map[string]struct{}
}

func newFakeExister(names ...string) *fakeExister {
	m := map[string]struct{}{}