cope with claims with no submitted_at in admin view

app/models/claim.rb

@@ -318,7 +318,7 @@ def payment_prevented_by_other_claims?
   end
 
   def decision_deadline_date
-    (submitted_at + DECISION_DEADLINE).to_date
+    (submitted_at + DECISION_DEADLINE).to_date if submitted?
   end
 
   def address(separator = ", ")

app/views/admin/claims/index.html.erb

@@ -85,7 +85,7 @@
               <% if claims_with_warning.nonzero? %>
                 <td class="govuk-table__cell"><%= decision_deadline_warning(claim) %></td>
               <% end %>
-              <td class="govuk-table__cell"><%= l(claim.decision_deadline_date) %></td>
+              <td class="govuk-table__cell"><%= l(claim.decision_deadline_date) if claim.submitted? %></td>
               <td class="govuk-table__cell"><%= claim.assigned_to.present? ? claim.assigned_to.full_name.titleize : nil %></td>
             </tr>
           <% end %>

spec/models/claim_spec.rb

@@ -1397,4 +1397,21 @@
       it { is_expected.to be false }
     end
   end
+
+  describe "#decision_deadline_date" do
+    subject { claim.decision_deadline_date }
+
+    before { travel_to Date.new(2024, 1, 1) }
+
+    context "when submitted_at populated" do
+      let(:claim) { create(:claim, :early_years_provider_submitted, policy: Policies::EarlyYearsPayments) }
+      it { is_expected.to eq nil }
+    end
+
+    context "when submitted_at not populated" do
+      let(:claim) { create(:claim, :submitted, policy: Policies::EarlyYearsPayments) }
+
+      it { is_expected.to eq Date.new(2024, 3, 25) }
+    end
+  end
 end