update copy to handle pluralisation in the case of joint purchase for staircasing, with associated testing changes

app/models/form/sales/pages/about_staircase.rb

@@ -1,17 +1,18 @@
 class Form::Sales::Pages::AboutStaircase < ::Form::Page
-  def initialize(id, hsh, subsection)
-    super
-    @id = "about_staircasing"
+  def initialize(id, hsh, subsection, joint_purchase:)
+    super(id, hsh, subsection)
+    @joint_purchase = joint_purchase
     @header = "About the staircasing transaction"
     @depends_on = [{
       "staircase" => 1,
+      "joint_purchase?" => joint_purchase
     }]
   end
 
   def questions
     @questions ||= [
       Form::Sales::Questions::StaircaseBought.new(nil, nil, self),
-      Form::Sales::Questions::StaircaseOwned.new(nil, nil, self),
+      Form::Sales::Questions::StaircaseOwned.new(nil, nil, self, joint_purchase: @joint_purchase),
       staircase_sale_question,
     ].compact
   end

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

@@ -1,9 +1,9 @@
 class Form::Sales::Questions::StaircaseOwned < ::Form::Question
-  def initialize(id, hsh, page)
-    super
+  def initialize(id, hsh, page, joint_purchase:)
+    super(id, hsh, page)
     @id = "stairowned"
-    @check_answer_label = "Percentage the buyer now owns in total"
-    @header = "What percentage of the property does the buyer now own in total?"
+    @check_answer_label = "Percentage the buyer#{'s' if joint_purchase} now own#{'s' if !joint_purchase} in total"
+    @header = "What percentage of the property #{joint_purchase ? 'do the buyers' : 'does the buyer'} now own in total?"
     @type = "numeric"
     @width = 5
     @min = 0

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

@@ -10,7 +10,8 @@ class Form::Sales::Subsections::SharedOwnershipScheme < ::Form::Subsection
     @pages ||= [
       Form::Sales::Pages::LivingBeforePurchase.new("living_before_purchase_shared_ownership", nil, self),
       Form::Sales::Pages::Staircase.new(nil, nil, self),
-      Form::Sales::Pages::AboutStaircase.new(nil, nil, self),
+      Form::Sales::Pages::AboutStaircase.new("about_staircasing_joint_purchase", nil, self, joint_purchase: true),
+      Form::Sales::Pages::AboutStaircase.new("about_staircasing_not_joint_purchase", nil, self, joint_purchase: false),
       Form::Sales::Pages::StaircaseBoughtValueCheck.new(nil, nil, self),
       Form::Sales::Pages::Resale.new(nil, nil, self),
       Form::Sales::Pages::ExchangeDate.new(nil, nil, self),

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

@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Pages::AboutStaircase, type: :model do
-  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+  subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase:) }
 
-  let(:page_id) { nil }
+  let(:page_id) { "an_id" }
   let(:page_definition) { nil }
   let(:subsection) { instance_double(Form::Subsection) }
+  let(:joint_purchase) { false }
 
   it "has correct subsection" do
     expect(page.subsection).to eq(subsection)
@@ -32,7 +33,7 @@ RSpec.describe Form::Sales::Pages::AboutStaircase, type: :model do
   end
 
   it "has the correct id" do
-    expect(page.id).to eq("about_staircasing")
+    expect(page.id).to eq("an_id")
   end
 
   it "has the correct header" do
@@ -43,9 +44,23 @@ RSpec.describe Form::Sales::Pages::AboutStaircase, type: :model do
     expect(page.description).to be_nil
   end
 
+  context "when not a joint purchase" do
     it "has correct depends_on" do
       expect(page.depends_on).to eq([{
         "staircase" => 1,
+        "joint_purchase?" => false,
       }])
     end
   end
+
+  context "when a joint purchase" do
+    let(:joint_purchase) { true }
+
+    it "has correct depends_on" do
+      expect(page.depends_on).to eq([{
+        "staircase" => 1,
+        "joint_purchase?" => true,
+      }])
+    end
+  end
+end

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

@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Questions::StaircaseOwned, type: :model do
-  subject(:question) { described_class.new(question_id, question_definition, page) }
+  subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase:) }
 
   let(:question_id) { nil }
   let(:question_definition) { nil }
   let(:page) { instance_double(Form::Page) }
+  let(:joint_purchase) { false }
 
   it "has correct page" do
     expect(question.page).to eq(page)
@@ -15,6 +16,19 @@ RSpec.describe Form::Sales::Questions::StaircaseOwned, type: :model do
     expect(question.id).to eq("stairowned")
   end
 
+  context "when a joint purchase" do
+    let(:joint_purchase) { true }
+
+    it "has the correct header" do
+      expect(question.header).to eq("What percentage of the property do the buyers now own in total?")
+    end
+
+    it "has the correct check_answer_label" do
+      expect(question.check_answer_label).to eq("Percentage the buyers now own in total")
+    end
+  end
+
+  context "when not a joint purchase" do
     it "has the correct header" do
       expect(question.header).to eq("What percentage of the property does the buyer now own in total?")
     end
@@ -22,6 +36,7 @@ RSpec.describe Form::Sales::Questions::StaircaseOwned, type: :model do
     it "has the correct check_answer_label" do
       expect(question.check_answer_label).to eq("Percentage the buyer now owns in total")
     end
+  end
 
   it "has the correct type" do
     expect(question.type).to eq("numeric")

spec/models/form/sales/subsections/shared_ownership_scheme_spec.rb

@@ -16,7 +16,8 @@ RSpec.describe Form::Sales::Subsections::SharedOwnershipScheme, type: :model do
       %w[
         living_before_purchase_shared_ownership
         staircasing
-        about_staircasing
+        about_staircasing_joint_purchase
+        about_staircasing_not_joint_purchase
         staircase_bought_value_check
         resale
         exchange_contracts