Add availability to the locations table

app/models/location.rb

@@ -368,6 +368,7 @@ class Location < ApplicationRecord
       { name: "Common type of unit", value: type_of_unit },
       { name: "Mobility type", value: mobility_type },
       { name: "Code", value: location_code },
+      { name: "Availability", value: "Available from #{available_from.to_formatted_s(:govuk_date)}" },
     ]
   end
 
@@ -397,4 +398,8 @@ private
       self.location_admin_district = result[:location_admin_district]
     end
   end
+
+  def available_from
+    startdate || created_at
+  end
 end

spec/features/schemes_spec.rb

@@ -692,7 +692,7 @@ RSpec.describe "Schemes scheme Features" do
 
         context "when I click to see individual scheme" do
           let(:scheme) { schemes.first }
-          let!(:location) { FactoryBot.create(:location, scheme:) }
+          let!(:location) { FactoryBot.create(:location, startdate: Time.zone.local(2022, 4, 4), scheme:) }
 
           before do
             click_link(scheme.service_name)
@@ -766,6 +766,7 @@ RSpec.describe "Schemes scheme Features" do
                 expect(page).to have_content(location.type_of_unit)
                 expect(page).to have_content(location.mobility_type)
                 expect(page).to have_content(location.location_code)
+                expect(page).to have_content("Available from 4 April 2022")
               end
 
               it "only allows to edit the location name" do

spec/models/location_spec.rb

@@ -113,7 +113,7 @@ RSpec.describe Location, type: :model do
   end
 
   describe "#display_attributes" do
-    let(:location) { FactoryBot.build(:location) }
+    let(:location) { FactoryBot.build(:location, startdate: Time.zone.local(2022, 8, 8)) }
 
     it "returns correct display attributes" do
       attributes = [
@@ -124,9 +124,17 @@ RSpec.describe Location, type: :model do
         { name: "Common type of unit", value: location.type_of_unit },
         { name: "Mobility type", value: location.mobility_type },
         { name: "Code", value: location.location_code },
+        { name: "Availability", value: "Available from 8 August 2022" },
       ]
 
       expect(location.display_attributes).to eq(attributes)
     end
+
+    it "displays created_at as availability date if startdate is not present" do
+      location.update!(startdate: nil)
+      availability_attribute = location.display_attributes.find { |x| x[:name] == "Availability" }[:value]
+
+      expect(availability_attribute).to eq("Available from #{location.created_at.to_formatted_s(:govuk_date)}")
+    end
   end
 end