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-rw-r--r--activerecord/test/cases/relation_test.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/activerecord/test/cases/relation_test.rb b/activerecord/test/cases/relation_test.rb
index f22fcd7b5a..c1805aa592 100644
--- a/activerecord/test/cases/relation_test.rb
+++ b/activerecord/test/cases/relation_test.rb
@@ -100,6 +100,14 @@ module ActiveRecord
assert_equal({ "hello" => "world", "id" => 10 }, relation.scope_for_create)
end
+ def test_empty_scope
+ relation = Relation.new(Post, Post.arel_table, Post.predicate_builder)
+ assert relation.empty_scope?
+
+ relation.merge!(relation)
+ assert relation.empty_scope?
+ end
+
def test_bad_constants_raise_errors
assert_raises(NameError) do
ActiveRecord::Relation::HelloWorld