Pull discardability/destroyability up to the Model

app/furniture/marketplace/delivery_area.rb

@@ -16,5 +16,13 @@ class DeliveryArea < Record
 
     attribute :delivery_window
     monetize :price_cents
+
+    def discardable?
+      persisted? && kept?
+    end
+
+    def destroyable?
+      persisted? && discarded? && orders.empty?
+    end
   end
 end

app/furniture/marketplace/delivery_area_component.rb

@@ -37,7 +37,7 @@ def discard_button
     end
 
     def discard_button?
-      delivery_area.persisted? && delivery_area.kept? && policy(delivery_area).destroy?
+      delivery_area.discardable? && policy(delivery_area).destroy?
     end
 
     def destroy_button
@@ -50,8 +50,7 @@ def destroy_button
     end
 
     def destroy_button?
-      delivery_area.persisted? && policy(delivery_area).destroy? &&
-        delivery_area.discarded? && delivery_area.orders.empty?
+      delivery_area.destroyable? && policy(delivery_area).destroy?
     end
   end
 end

spec/furniture/marketplace/delivery_area_spec.rb

@@ -5,4 +5,48 @@
   it { is_expected.to have_many(:orders).inverse_of(:delivery_area) }
   it { is_expected.to have_many(:carts).inverse_of(:delivery_area) }
   it { is_expected.to have_many(:deliveries).inverse_of(:delivery_area) }
+
+  describe "#discardable?" do
+    subject(:delivery_area) { build(:marketplace_delivery_area) }
+
+    it { is_expected.not_to be_discardable }
+
+    context "when the delivery area is persisted" do
+      subject(:delivery_area) { create(:marketplace_delivery_area) }
+
+      it { is_expected.to be_discardable }
+
+      context "when the delivery area is discarded already" do
+        subject(:delivery_area) { create(:marketplace_delivery_area, :discarded) }
+
+        it { is_expected.not_to be_discardable }
+      end
+    end
+  end
+
+  describe "#destroyable?" do
+    subject(:delivery_area) { build(:marketplace_delivery_area) }
+
+    it { is_expected.not_to be_destroyable }
+
+    context "when a delivery area is persisted" do
+      subject(:delivery_area) { create(:marketplace_delivery_area) }
+
+      it { is_expected.not_to be_destroyable }
+
+      context "when the delivery area is discarded" do
+        subject(:delivery_area) { create(:marketplace_delivery_area, :discarded) }
+
+        it { is_expected.to be_destroyable }
+
+        context "when the delivery area has orders" do
+          subject(:delivery_area) { create(:marketplace_delivery_area, :discarded) }
+
+          before { create(:marketplace_order, delivery_area:) }
+
+          it { is_expected.not_to be_destroyable }
+        end
+      end
+    end
+  end
 end