Create shared example for delete confirmation

spec/support/shared_examples/requests/delete_confirmation.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+RSpec.shared_context "with delete confirmation view" do |record:, route: nil|
+  let(:confirm) { nil }
+  let(:params)  { {} }
+
+  context "with preferred columns in URL" do
+    if route
+      let(:response) do
+        delete public_send(route, record, params.merge(confirm:))
+
+        # NOTE: used to simplify usage and custom test done in final spec file.
+        @response # rubocop:disable RSpec/InstanceVariable
+      end
+    else
+      before do
+        delete url_for(record, params.merge(confirm:))
+      end
+    end
+
+    context "without confirmation" do
+      it { expect(response).to have_http_status(:success) }
+      it { expect(response).to render_template(:delete) }
+      it { expect { response }.not_to change(record.klass, :count) }
+
+      it do
+        record.reload
+
+        expect(record.destroyed?).to be(false)
+      end
+
+      context "with confirmation" do
+        let(:confirm) { true }
+
+        it { expect(response).to have_http_status(:redirection) }
+        it { expect { response }.to change(record.klass, :count).by(-1) }
+        it { expect { record.reload }.to raise_error(ActiveRecord::RecordNotFound) }
+      end
+    end
+  end
+end