Last settled accommodation and discounted ownership property postcodes must match (#1213)

app/models/validations/sales/household_validations.rb

@@ -32,6 +32,15 @@ module Validations::Sales::HouseholdValidations
     end
   end
 
+  def validate_previous_postcode(record)
+    return unless record.postcode_full && record.ppostcode_full && record.discounted_ownership_sale?
+
+    unless record.postcode_full == record.ppostcode_full
+      record.errors.add :postcode_full, I18n.t("validations.household.postcode.discounted_ownership")
+      record.errors.add :ppostcode_full, I18n.t("validations.household.postcode.discounted_ownership")
+    end
+  end
+
 private
 
   def validate_person_age_matches_relationship(record, person_num)

config/locales/en.yml

@@ -369,6 +369,8 @@ en:
       condition_effects:
         no_choices: "You cannot answer this question as you told us nobody in the household has a physical or mental health condition (or other illness) expected to last 12 months or more"
       old_persons_shared_ownership: "Are you sure? At least one buyer should be aged over 64 for Older persons‘ shared ownership scheme"
+      postcode:
+        discounted_ownership: "Last settled accommodation and discounted ownership property postcodes must match"
 
     tenancy:
       length:

spec/models/validations/sales/household_validations_spec.rb

@@ -280,4 +280,62 @@ RSpec.describe Validations::Sales::HouseholdValidations do
       end
     end
   end
+
+  describe "previous postcode validations" do
+    let(:record) { build(:sales_log) }
+
+    context "with a discounted sale" do
+      before do
+        record.ownershipsch = 2
+      end
+
+      it "adds an error when previous and current postcodes are not the same" do
+        record.postcode_full = "SO32 3PT"
+        record.ppostcode_full = "DN6 7FB"
+        household_validator.validate_previous_postcode(record)
+        expect(record.errors["postcode_full"])
+          .to include(match I18n.t("validations.household.postcode.discounted_ownership"))
+        expect(record.errors["ppostcode_full"])
+          .to include(match I18n.t("validations.household.postcode.discounted_ownership"))
+      end
+
+      it "allows same postcodes" do
+        record.postcode_full = "SO32 3PT"
+        record.ppostcode_full = "SO32 3PT"
+        household_validator.validate_previous_postcode(record)
+        expect(record.errors["postcode_full"]).to be_empty
+        expect(record.errors["ppostcode_full"]).to be_empty
+      end
+
+      it "does not add an error when postcode is missing" do
+        record.postcode_full = nil
+        record.ppostcode_full = "SO32 3PT"
+        household_validator.validate_previous_postcode(record)
+        expect(record.errors["postcode_full"]).to be_empty
+        expect(record.errors["ppostcode_full"]).to be_empty
+      end
+
+      it "does not add an error when previous postcode is missing" do
+        record.postcode_full = "SO32 3PT"
+        record.ppostcode_full = nil
+        household_validator.validate_previous_postcode(record)
+        expect(record.errors["postcode_full"]).to be_empty
+        expect(record.errors["ppostcode_full"]).to be_empty
+      end
+    end
+
+    context "without a discounted sale" do
+      before do
+        record.ownershipsch = 1
+      end
+
+      it "allows different postcodes" do
+        record.postcode_full = "SO32 3PT"
+        record.ppostcode_full = "DN6 7FB"
+        household_validator.validate_previous_postcode(record)
+        expect(record.errors["postcode_full"]).to be_empty
+        expect(record.errors["ppostcode_full"]).to be_empty
+      end
+    end
+  end
 end