FIX: Don't suggest invalid username

spec/components/user_name_suggester_spec.rb

@@ -93,6 +93,15 @@ describe UserNameSuggester do
     it 'should handle typical facebook usernames' do
       expect(UserNameSuggester.suggest('roger.nelson.3344913')).to eq('roger.nelson.33')
     end
+
+    it 'removes underscore at the end of long usernames that get truncated' do
+      expect(UserNameSuggester.suggest('uuuuuuuuuuuuuu_u')).to_not end_with('_')
+    end
+
+    it "adds number if it's too short after removing trailing underscore" do
+      User.stubs(:username_length).returns(8..8)
+      expect(UserNameSuggester.suggest('uuuuuuu_u')).to eq('uuuuuuu1')
+    end
   end
 
 end