Add markdown declaration to check your answers page, if the form has it

app/views/forms/check_your_answers/show.html.erb

@@ -30,14 +30,16 @@
 
       <%= form.hidden_field :confirmation_email_reference, id: 'confirmation-email-reference' %>
 
-      <%if @current_context.form.declaration_text.present? %>
+      <%if @current_context.form.try(:declaration_markdown).present? %>
+        <h2 class="govuk-heading-m govuk-!-margin-top-7"><%= t('form.check_your_answers.declaration') %></h2>
+        <%= HtmlMarkdownSanitizer.new.render_scrubbed_markdown(@current_context.form.declaration_markdown) %>
+      <%elsif @current_context.form.declaration_text.present? %>
         <h2 class="govuk-heading-m govuk-!-margin-top-7"><%= t('form.check_your_answers.declaration') %></h2>
         <%= HtmlMarkdownSanitizer.new.render_scrubbed_html(@current_context.form.declaration_text) %>
       <% end %>
 
-      <%= form.govuk_submit(@current_context.form.declaration_text.present? ? t('form.check_your_answers.agree_and_submit') : t('form.check_your_answers.submit')) %>
-    </div>
-
+      <% declaration_present = @current_context.form.try(:declaration_markdown).present? || @current_context.form.declaration_text.present? %>
+      <%= form.govuk_submit(declaration_present ? t('form.check_your_answers.agree_and_submit') : t('form.check_your_answers.submit')) %> </div>
 
   </div>
   <div class="govuk-grid-row">

spec/views/forms/check_your_answers/show.html.erb_spec.rb

@@ -1,11 +1,12 @@
 require "rails_helper"
 
 describe "forms/check_your_answers/show.html.erb" do
-  let(:form) { build :form, :with_support, id: 1, declaration_text: }
+  let(:form) { build :form, :with_support, id: 1, declaration_text:, declaration_markdown: }
   let(:support_details) { OpenStruct.new(email: form.support_email) }
   let(:context) { OpenStruct.new(form:) }
   let(:full_width) { false }
   let(:declaration_text) { nil }
+  let(:declaration_markdown) { nil }
   let(:email_confirmation_input) { build :email_confirmation_input }
   let(:question) { build :text, question_text: "Do you want to remain anonymous?", text: "Yes" }
   let(:steps) { [build(:step, question:, page: build(:page, :with_text_settings))] }
@@ -41,6 +42,35 @@
     end
   end
 
+  context "when the form has a markdown declaration and declaration text" do
+    let(:declaration_text) { "You should agree to all terms before submitting" }
+    let(:declaration_markdown) { "This is the markdown decalaration\n\nsecond paragraph" }
+
+    it "displays the declaration heading" do
+      expect(rendered).to have_css("h2", text: "Declaration")
+    end
+
+    it "displays declaration markdown" do
+      expect(rendered).to have_css("p", text: "second paragraph")
+    end
+
+    it "does not display declaration text" do
+      expect(rendered).not_to have_css("p", text: form.declaration_text)
+    end
+  end
+
+  context "when the form has a markdown declaration only" do
+    let(:declaration_markdown) { "This is the markdown decalaration\n\nsecond paragraph" }
+
+    it "displays the declaration heading" do
+      expect(rendered).to have_css("h2", text: "Declaration")
+    end
+
+    it "displays declaration markdown" do
+      expect(rendered).to have_css("p", text: "second paragraph")
+    end
+  end
+
   it "displays the summary list two-thirds width" do
     expect(rendered).not_to have_css(".govuk-grid-column-full .govuk-summary-list")
     expect(rendered).to have_css(".govuk-grid-column-two-thirds-from-desktop .govuk-summary-list")