checks valid age

spec/features/management/document_verifications_spec.rb

@@ -62,4 +62,14 @@ feature 'DocumentVerifications' do
     expect(page).to have_content "Document number: 12345H"
   end
 
+  scenario 'User age is checked' do
+    expect_any_instance_of(Verification::Management::Document).to receive(:under_sixteen?).and_return(true)
+
+    visit management_document_verifications_path
+    fill_in 'document_verification_document_number', with: '1234'
+    click_button 'Check'
+
+    expect(page).to have_content "You must be over 16 to verify your account."
+  end
+
 end