adds rspec.

spec/hyrax/transactions/file_set_destroy_spec.rb

@@ -10,6 +10,11 @@
   describe '#call' do
     let(:user) { FactoryBot.create(:user) }
 
+    before do
+      file_set.permission_manager.read_users = [user.user_key]
+      file_set.permission_manager.acl.save
+    end
+
     context 'without a user' do
       it 'is a failure' do
         expect(transaction.call(file_set)).to be_failure
@@ -28,6 +33,13 @@
         .to raise_error Valkyrie::Persistence::ObjectNotFoundError
     end
 
+    it 'deletes the access control resource' do
+      expect { transaction.with_step_args('file_set.remove_from_work' => { user: user }).call(file_set) }
+        .to change { Hyrax::AccessControl.for(resource: file_set).persisted? }
+        .from(true)
+        .to(false)
+    end
+
     context "with attached files" do
       let(:work) { FactoryBot.valkyrie_create(:hyrax_work, uploaded_files: [FactoryBot.create(:uploaded_file)], edit_users: [user]) }
       let(:file_set) { query_service.find_members(resource: work).first }