1 files changed, 9 insertions, 0 deletions
diff --git a/spec/models/custom_emoji_spec.rb b/spec/models/custom_emoji_spec.rb
index 62380299ea0..41ce480b02f 100644
--- a/spec/models/custom_emoji_spec.rb
+++ b/spec/models/custom_emoji_spec.rb
@@ -22,6 +22,15 @@ RSpec.describe CustomEmoji do
       expect(new_emoji.errors.messages).to eq(name: ["#{emoji_name} is already being used for another emoji"])
     end
 
+    it 'disallows very long invalid emoji name without regular expression backtracking issues' do
+      new_emoji = build(:custom_emoji, name: 'a' * 10000 + '!', group: group)
+
+      Timeout.timeout(1) do
+        expect(new_emoji).not_to be_valid
+        expect(new_emoji.errors.messages).to eq(name: ["is too long (maximum is 36 characters)", "is invalid"])
+      end
+    end
+
     it 'disallows duplicate custom emoji names within namespace' do
       old_emoji = create(:custom_emoji, group: group)
       new_emoji = build(:custom_emoji, name: old_emoji.name, namespace: old_emoji.namespace, group: group)