1 files changed, 19 insertions, 0 deletions
diff --git a/spec/helpers/form_helper_spec.rb b/spec/helpers/form_helper_spec.rb
index 68aa0137cd5..6698d8970e7 100644
--- a/spec/helpers/form_helper_spec.rb
+++ b/spec/helpers/form_helper_spec.rb
@@ -39,6 +39,25 @@ describe FormHelper do
       end
     end
 
+    it 'renders messages truncated if requested' do
+      model = double(errors: errors_stub('Error 1', 'Error 2'))
+      model.errors.add(:title, 'is truncated')
+      model.errors.add(:base, 'Error 3')
+
+      expect(model.class).to receive(:human_attribute_name) do |attribute|
+        attribute.to_s.capitalize
+      end
+
+      errors = helper.form_errors(model, truncate: :title)
+
+      aggregate_failures do
+        expect(errors).to include('<li>Error 1</li>')
+        expect(errors).to include('<li>Error 2</li>')
+        expect(errors).to include('<li><span class="str-truncated-100">Title is truncated</span></li>')
+        expect(errors).to include('<li>Error 3</li>')
+      end
+    end
+
     def errors_stub(*messages)
       ActiveModel::Errors.new(double).tap do |errors|
         messages.each { |msg| errors.add(:base, msg) }