Update displayed answer options

app/models/form/sales/questions/mortgageused.rb

@@ -13,7 +13,7 @@ class Form::Sales::Questions::Mortgageused < ::Form::Question
   def displayed_answer_options(log, _user = nil)
     if log.outright_sale? && log.saledate && !form.start_year_2024_or_later?
       answer_options_without_dont_know
-    elsif log.stairowned == 100 || log.outright_sale? || form.start_year_2025_or_later?
+    elsif log.stairowned_100? || log.outright_sale? || (log.is_staircase? && form.start_year_2025_or_later?)
       ANSWER_OPTIONS
     else
       answer_options_without_dont_know

spec/models/form/sales/questions/mortgageused_spec.rb

@@ -3,16 +3,24 @@ require "rails_helper"
 RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
   subject(:question) { described_class.new(question_id, question_definition, page, ownershipsch:) }
 
-  let(:ownershipsch) { 1 }
   let(:question_id) { nil }
   let(:question_definition) { nil }
-  let(:form) { instance_double(Form, start_date: Time.zone.local(2024, 4, 1)) }
-  let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form:)) }
   let(:stairowned) { nil }
   let(:staircase) { nil }
   let(:saledate) { Time.zone.today }
   let(:log) { build(:sales_log, :in_progress, ownershipsch:, stairowned:, staircase:) }
 
+  context "when the form start year is 2024" do
+    let(:form) { instance_double(Form, start_date: Time.zone.local(2024, 4, 1)) }
+    let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form:)) }
+    let(:saledate) { Time.zone.local(2024, 5, 1) }
+    let(:ownershipsch) { 1 }
+
+    before do
+      allow(form).to receive(:start_year_2024_or_later?).and_return true
+      allow(form).to receive(:start_year_2025_or_later?).and_return false
+    end
+
     it "has the correct answer_options" do
       expect(question.answer_options).to eq({
         "1" => { "value" => "Yes" },
@@ -21,10 +29,13 @@ RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
       })
     end
 
-  describe "the displayed answer options" do
     context "when it is a discounted ownership sale" do
       let(:ownershipsch) { 2 }
 
+      it "shows the correct question number" do
+        expect(question.question_number).to eq 104
+      end
+
       it "does not show the don't know option" do
         expect_the_question_not_to_show_dont_know
       end
@@ -34,20 +45,14 @@ RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
       let(:ownershipsch) { 3 }
 
       context "and the saledate is before 24/25" do
-        before do
-          allow(form).to receive(:start_year_2024_or_later?).and_return false
-        end
+        let(:saledate) { Time.zone.local(2023, 5, 1) }\
 
-        it "does not show the don't know option" do
-          expect_the_question_not_to_show_dont_know
-        end
+        it "does show the don't know option" do
+          expect_the_question_to_show_dont_know
         end
-
-      context "and the saledate is 24/25 or after" do
-        before do
-          allow(form).to receive(:start_year_2024_or_later?).and_return true
       end
 
+      context "and the saledate is 24/25" do
         it "shows the don't know option" do
           expect_the_question_to_show_dont_know
         end
@@ -87,6 +92,57 @@ RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
     end
   end
 
+  context "when the form start year is 2025" do
+    let(:form) { instance_double(Form, start_date: Time.zone.local(2025, 4, 1)) }
+    let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form:)) }
+    let(:saledate) { Time.zone.local(2025, 5, 1) }
+
+    before do
+      allow(form).to receive(:start_year_2024_or_later?).and_return true
+      allow(form).to receive(:start_year_2025_or_later?).and_return true
+    end
+
+    context "when it is a discounted ownership sale" do
+      let(:ownershipsch) { 2 }
+
+      it "shows the correct question number" do
+        expect(question.question_number).to eq 104
+      end
+
+      it "does not show the don't know option" do
+        expect_the_question_not_to_show_dont_know
+      end
+    end
+
+    context "when it is a shared ownership scheme" do
+      let(:ownershipsch) { 1 }
+
+      context "and it is a staircasing transaction" do
+        let(:staircase) { 1 }
+
+        it "does  show the don't know option" do
+          expect_the_question_to_show_dont_know
+        end
+
+        context "and stairowned is 100" do
+          let(:stairowned) { 100 }
+
+          it "shows the don't know option" do
+            expect_the_question_to_show_dont_know
+          end
+        end
+      end
+
+      context "and it is not a staircasing transaction" do
+        let(:staircase) { 2 }
+
+        it "does not show the don't know option" do
+          expect_the_question_not_to_show_dont_know
+        end
+      end
+    end
+  end
+
   private
 
   def expect_the_question_not_to_show_dont_know