Searching variants should order results by variants display name

spec/lib/open_food_network/scope_variants_to_search_spec.rb

@@ -61,5 +61,20 @@ describe OpenFoodNetwork::ScopeVariantsForSearch do
         expect(result).to_not include v1, v2, v3
       end
     end
+
+    context "searching products starting with the same 3 caracters" do
+      let(:params) { { q: "pro" } }
+      it "returns variants ordered by display_name" do
+        v1.display_name = "Product 1 - b"
+        v2.display_name = "Product 1 - a"
+        v3.display_name = "Product 1 - c"
+        v4.display_name = "Product 1"
+        v1.save!
+        v2.save!
+        v3.save!
+        v4.save!
+        expect(result.map(&:display_name)).to eq ["Product 1", "Product 1 - a", "Product 1 - b", "Product 1 - c"]
+      end
+    end
   end
 end