Add tests where there is logic on page/question to decide copy key

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

@@ -22,4 +22,20 @@ RSpec.describe Form::Sales::Pages::BuyerInterview, type: :model do
   it "has the correct description" do
     expect(page.description).to be_nil
   end
+
+  context "when there are joint buyers" do
+    subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase: true) }
+
+    it "has the expected copy_key" do
+      expect(page.copy_key).to eq("sales.setup.noint.joint_purchase")
+    end
+  end
+
+  context "when there is a single buyer" do
+    subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase: false) }
+
+    it "has the expected copy_key" do
+      expect(page.copy_key).to eq("sales.setup.noint.not_joint_purchase")
+    end
+  end
 end

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

@@ -29,21 +29,27 @@ RSpec.describe Form::Sales::Pages::PrivacyNotice, type: :model do
     expect(page.description).to be_nil
   end
 
-  it "has correct depends_on" do
-    expect(page.depends_on).to eq([{ "not_joint_purchase?" => true }, { "jointpur" => nil }])
-  end
-
-  context "with joint purchase" do
+  context "when there are joint buyers" do
     subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase: true) }
 
-    let(:page_id) { "privacy_notice_joint_purchase" }
+    it "has the expected copy_key" do
+      expect(page.copy_key).to eq("sales.setup.privacynotice.joint_purchase")
+    end
 
     it "has correct depends_on" do
       expect(page.depends_on).to eq([{ "joint_purchase?" => true }])
     end
+  end
+
+  context "when there is a single buyer" do
+    subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase: false) }
+
+    it "has the expected copy_key" do
+      expect(page.copy_key).to eq("sales.setup.privacynotice.not_joint_purchase")
+    end
 
-    it "has the correct id" do
-      expect(page.id).to eq("privacy_notice_joint_purchase")
+    it "has correct depends_on" do
+      expect(page.depends_on).to eq([{ "not_joint_purchase?" => true }, { "jointpur" => nil }])
     end
   end
 end

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

@@ -29,4 +29,20 @@ RSpec.describe Form::Sales::Questions::BuyerInterview, type: :model do
       "1" => { "value" => "No" },
     })
   end
+
+  context "when there are joint buyers" do
+    subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase: true) }
+
+    it "has the expected copy_key" do
+      expect(question.copy_key).to eq("sales.setup.noint.joint_purchase")
+    end
+  end
+
+  context "when there is a single buyer" do
+    subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase: false) }
+
+    it "has the expected copy_key" do
+      expect(question.copy_key).to eq("sales.setup.noint.not_joint_purchase")
+    end
+  end
 end

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

@@ -31,6 +31,22 @@ RSpec.describe Form::Sales::Questions::PrivacyNotice, type: :model do
     expect(question.derived?(nil)).to be false
   end
 
+  context "when there are joint buyers" do
+    subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase: true) }
+
+    it "has the expected copy_key" do
+      expect(question.copy_key).to eq("sales.setup.privacynotice.joint_purchase")
+    end
+  end
+
+  context "when there is a single buyer" do
+    subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase: false) }
+
+    it "has the expected copy_key" do
+      expect(question.copy_key).to eq("sales.setup.privacynotice.not_joint_purchase")
+    end
+  end
+
   context "when the form year is before 2024" do
     before do
       allow(form).to receive(:start_year_after_2024?).and_return(false)