Add unit test

spec/serializers/api/uncached_enterprise_serializer_spec.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Api::UncachedEnterpriseSerializer do
+  let(:serializer) {
+    described_class.new enterprise, { data: OpenFoodNetwork::EnterpriseInjectionData.new }
+  }
+  let(:enterprise) { create :enterprise }
+
+  before do
+    allow_any_instance_of(OpenFoodNetwork::EnterpriseInjectionData).to(
+      receive(:earliest_closing_times).
+        and_return(data)
+    )
+  end
+
+  describe '#orders_close_at' do
+    context "for an enterprise with an active order cycle" do
+      let(:order_cycle) { create :open_order_cycle, coordinator: enterprise }
+      let(:data) { { enterprise.id => order_cycle.orders_close_at } }
+
+      it "returns a closing time for an enterprise" do
+        expect(serializer.orders_close_at).to eq order_cycle.orders_close_at
+      end
+    end
+
+    context "for an enterprise without an active order cycle" do
+      let(:data) { {} }
+
+      it "returns nil for an enterprise without a closing time" do
+        expect(serializer.orders_close_at).to be_nil
+      end
+    end
+  end
+end