diff options
Diffstat (limited to 'spec/lib/gitlab/sql/union_spec.rb')
| -rw-r--r-- | spec/lib/gitlab/sql/union_spec.rb | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/spec/lib/gitlab/sql/union_spec.rb b/spec/lib/gitlab/sql/union_spec.rb index 8026fba9f0a..fe6422c32b6 100644 --- a/spec/lib/gitlab/sql/union_spec.rb +++ b/spec/lib/gitlab/sql/union_spec.rb @@ -29,5 +29,12 @@ describe Gitlab::SQL::Union do expect(union.to_sql).to include('UNION ALL') end + + it 'returns `NULL` if all relations are empty' do + empty_relation = User.none + union = described_class.new([empty_relation, empty_relation]) + + expect(union.to_sql).to eq('NULL') + end end end |