CLDC-3766: Ensure copy for sales Q78 is found correctly for 2024 logs (#2790)

* CLDC-3766: Ensure copy for Q78 is found correctly

* Fix tests

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

@@ -2,7 +2,7 @@ class Form::Sales::Questions::Staircase < ::Form::Question
   def initialize(id, hsh, page)
     super
     @id = "staircase"
-    @copy_key = "sales.#{page.subsection.id}.staircasing"
+    @copy_key = "sales.#{page.subsection.copy_key}.staircasing"
     @type = "radio"
     @question_number = QUESTION_NUMBER_FROM_YEAR[form.start_date.year] || QUESTION_NUMBER_FROM_YEAR[QUESTION_NUMBER_FROM_YEAR.keys.max]
   end

app/models/form/sales/subsections/shared_ownership_scheme.rb

@@ -4,6 +4,7 @@ class Form::Sales::Subsections::SharedOwnershipScheme < ::Form::Subsection
     @id = "shared_ownership_scheme"
     @label = "Shared ownership scheme"
     @depends_on = [{ "ownershipsch" => 1, "setup_completed?" => true }]
+    @copy_key = "sale_information"
   end
 
   def pages

app/models/form/subsection.rb

@@ -14,6 +14,10 @@ class Form::Subsection
 
   delegate :form, to: :section
 
+  def copy_key
+    @copy_key ||= @id
+  end
+
   def questions
     @questions ||= pages.flat_map(&:questions)
   end

spec/models/form/sales/pages/staircase_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe Form::Sales::Pages::Staircase, type: :model do
   let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2023, 4, 1))) }
 
   context "when start year is 2024" do
-    let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2023, 4, 1)), id: "sale_information") }
+    let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2023, 4, 1)), id: "shared_ownership_scheme", copy_key: "sale_information") }
 
     before do
       allow(subsection.form).to receive(:start_year_2025_or_later?).and_return(false)
@@ -32,7 +32,7 @@ RSpec.describe Form::Sales::Pages::Staircase, type: :model do
   end
 
   context "when start year is >= 2025" do
-    let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2023, 4, 1)), id: "setup") }
+    let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2023, 4, 1)), id: "setup", copy_key: "setup") }
 
     before do
       allow(subsection.form).to receive(:start_year_2025_or_later?).and_return(true)

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

@@ -7,7 +7,7 @@ RSpec.describe Form::Sales::Questions::Staircase, type: :model do
   let(:question_definition) { nil }
 
   context "when start year is 2024" do
-    let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2024, 4, 1)), id: "sale_information")) }
+    let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2024, 4, 1)), id: "shared_ownership_scheme", copy_key: "sale_information")) }
 
     before do
       allow(page.subsection.form).to receive(:start_year_2025_or_later?).and_return(false)
@@ -43,7 +43,7 @@ RSpec.describe Form::Sales::Questions::Staircase, type: :model do
   end
 
   context "when start year is 2025" do
-    let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2025, 4, 1)), id: "setup")) }
+    let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2025, 4, 1)), id: "setup", copy_key: "setup")) }
 
     before do
       allow(page.subsection.form).to receive(:start_year_2025_or_later?).and_return(true)