Add buyer previous page and question

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

@@ -0,0 +1,15 @@
+class Form::Sales::Pages::BuyerPrevious < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "buyer_previous"
+    @header = ""
+    @description = ""
+    @subsection = subsection
+  end
+
+  def questions
+    @questions ||= [
+      Form::Sales::Questions::BuyerPrevious.new(nil, nil, self),
+    ]
+  end
+end

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

@@ -0,0 +1,16 @@
+class Form::Sales::Questions::BuyerPrevious < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "soctenant"
+    @check_answer_label = "Buyer was a registered provider, housing association or local authority tenant immediately before this sale?"
+    @header = "Was the buyer a private registered provider, housing association or local authority tenant immediately before this sale?"
+    @type = "radio"
+    @answer_options = ANSWER_OPTIONS
+    @page = page
+  end
+
+  ANSWER_OPTIONS = {
+    "1" => { "value" => "Yes" },
+    "2" => { "value" => "No" },
+  }.freeze
+end

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

@@ -0,0 +1,29 @@
+require "rails_helper"
+
+RSpec.describe Form::Sales::Pages::BuyerPrevious, type: :model do
+  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+
+  let(:page_id) { nil }
+  let(:page_definition) { nil }
+  let(:subsection) { instance_double(Form::Subsection) }
+
+  it "has correct subsection" do
+    expect(page.subsection).to eq(subsection)
+  end
+
+  it "has correct questions" do
+    expect(page.questions.map(&:id)).to eq(%w[soctenant])
+  end
+
+  it "has the correct id" do
+    expect(page.id).to eq("buyer_previous")
+  end
+
+  it "has the correct header" do
+    expect(page.header).to eq("")
+  end
+
+  it "has the correct description" do
+    expect(page.description).to eq("")
+  end
+end

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

@@ -0,0 +1,48 @@
+require "rails_helper"
+
+RSpec.describe Form::Sales::Questions::BuyerPrevious, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("soctenant")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Was the buyer a private registered provider, housing association or local authority tenant immediately before this sale?")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to eq("Buyer was a registered provider, housing association or local authority tenant immediately before this sale?")
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("radio")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct answer_options" do
+    expect(question.answer_options).to eq({
+      "1" => { "value" => "Yes" },
+      "2" => { "value" => "No" },
+    })
+  end
+
+  it "has correct conditional for" do
+    expect(question.conditional_for).to eq(nil)
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to eq(nil)
+  end
+end