Revert undesired change (#22458).

git-svn-id: https://svn.redmine.org/redmine/trunk@22460 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/issue_nested_set_concurrency_test.rb

@@ -59,6 +59,21 @@ class IssueNestedSetConcurrencyTest < ActiveSupport::TestCase
     end
   end
 
+  def test_concurrent_subtasks_creation
+    root = Issue.generate!
+    assert_difference 'Issue.count', 30 do
+      threaded(3) do
+        10.times do
+          Issue.generate! :parent_issue_id => root.id
+        end
+      end
+    end
+    root.reload
+    assert_equal [1, 62], [root.lft, root.rgt]
+    children_bounds = root.children.sort_by(&:lft).map {|c| [c.lft, c.rgt]}.flatten
+    assert_equal (2..61).to_a, children_bounds
+  end
+
   private
 
   def threaded(count, &block)