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-rw-r--r--activerecord/test/cases/relations_test.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 7163697a68..410b5ba5a3 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -420,6 +420,11 @@ class RelationTest < ActiveRecord::TestCase
assert_equal nil, ac.engines.maximum(:id)
end
+ def test_null_relation_in_where_condition
+ assert_operator Comment.count, :>, 0 # precondition, make sure there are comments.
+ assert_equal 0, Comment.where(post_id: Post.none).to_a.size
+ end
+
def test_joins_with_nil_argument
assert_nothing_raised { DependentFirm.joins(nil).first }
end