CLDC-4250: Add a new validation for universal credit and household income sources

app/models/lettings_log.rb

@@ -542,7 +542,7 @@ class LettingsLog < Log
     reason == 1
   end
 
-  def receives_housing_benefit_only?
+  def receives_housing_benefit?
     # 1: Housing benefit
     hb == 1
   end
@@ -551,13 +551,7 @@ class LettingsLog < Log
     hb == 3
   end
 
-  # Option 8 has been removed starting from 22/23
-  def receives_housing_benefit_and_universal_credit?
-    # 8: Housing benefit and Universal Credit (without housing element)
-    hb == 8
-  end
-
-  def receives_uc_with_housing_element_excl_housing_benefit?
+  def receives_universal_credit
     # 6: Universal Credit with housing element (excluding housing benefit)
     hb == 6
   end
@@ -572,12 +566,11 @@ class LettingsLog < Log
   end
 
   def receives_housing_related_benefits?
-    if collection_start_year <= 2021
-      receives_housing_benefit_only? || receives_uc_with_housing_element_excl_housing_benefit? ||
-        receives_housing_benefit_and_universal_credit?
-    else
-      receives_housing_benefit_only? || receives_uc_with_housing_element_excl_housing_benefit?
-    end
+    receives_housing_benefit? || receives_universal_credit
+  end
+
+  def no_household_income_comes_from_benefits?
+    benefits == 3
   end
 
   def local_housing_referral?

app/models/validations/financial_validations.rb

@@ -175,6 +175,15 @@ module Validations::FinancialValidations
     end
   end
 
+  def validate_housing_universal_credit_matches_income_proportion(record)
+    return unless record.hb && record.benefits && record.form.start_year_2026_or_later?
+
+    if record.receives_universal_credit && record.no_household_income_comes_from_benefits?
+      record.errors.add :hb, I18n.t("validations.lettings.financial.hb.benefits_received_not_match_income_source")
+      record.errors.add :benefits, I18n.t("validations.lettings.financial.benefits.benefits_received_not_match_income_source")
+    end
+  end
+
 private
 
   def validate_charges(record)

config/locales/validations/lettings/financial.en.yml

@@ -12,6 +12,7 @@ en:
           outstanding_amount_not_expected: "Answer must be ‘yes’ as you have answered the outstanding amount question."
         benefits:
           part_or_full_time: "Answer cannot be ‘all’ for income from Universal Credit, state pensions or benefits if the tenant or their partner works part-time or full-time."
+          benefits_received_not_match_income_source: "You answered that none of the household’s income is from Universal Credit, state pensions or benefits, but also that the tenant is likely to be receiving Universal Credit."
         earnings:
           over_hard_max: "The household’s income cannot be greater than %{hard_max} per week given the household’s working situation."
           under_hard_min: "The household’s income cannot be less than %{hard_min} per week given the household’s working situation."
@@ -87,3 +88,5 @@ en:
         needstype:
           rent_below_hard_min: "Rent is below the absolute minimum expected for a property of this type based on this lettings type."
           rent_above_hard_max: "Rent is higher than the absolute maximum expected for a property of this type based on this lettings type."
+        hb:
+          benefits_received_not_match_income_source: "You answered that none of the household’s income is from Universal Credit, state pensions or benefits, but also that the tenant is likely to be receiving Universal Credit."