Disallow numeric-only hashtags (#11363)

* Add spec covering numeric-only hashtags

* Fix hashtag regex

1 files changed, 4 insertions, 0 deletions

diff --git a/spec/models/tag_spec.rb b/spec/models/tag_spec.rb
index 161862392..9a30ceaa5 100644
--- a/spec/models/tag_spec.rb
+++ b/spec/models/tag_spec.rb
@@ -69,6 +69,10 @@ RSpec.describe Tag, type: :model do
     it 'does not match middle dots at the end' do
       expect(subject.match('hello #one·two·three·').to_s).to eq ' #one·two·three'
     end
+
+    it 'does not match purely-numeric hashtags' do
+      expect(subject.match('hello #0123456')).to be_nil
+    end
   end
 
   describe '#to_param' do