Add gender 1 question

app/models/form/sales/questions/gender_identity_1.rb

@@ -0,0 +1,11 @@
+class Form::Sales::Questions::GenderIdentity1 < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "sex1"
+    @check_answer_label = "Buyer 1’s gender identity"
+    @header = "Which of these best describes buyer 1’s gender identity?"
+    @type = "radio"
+    @hint_text = "Buyer 1 is the person in the household who does the most paid work. If it’s a joint purchase and the buyers do the same amount of paid work, buyer 1 is whoever is the oldest."
+    @page = page
+  end
+end

spec/models/form/sales/questions/gender_identity_1_spec.rb

@@ -0,0 +1,37 @@
+require "rails_helper"
+
+RSpec.describe Form::Sales::Questions::GenderIdentity1, 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("sex1")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Which of these best describes buyer 1’s gender identity?")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to eq("Buyer 1’s gender identity")
+  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 hint" do
+    expect(question.hint_text).to eq("Buyer 1 is the person in the household who does the most paid work. If it’s a joint purchase and the buyers do the same amount of paid work, buyer 1 is whoever is the oldest.")
+  end
+end