get rid of using instance_variable_names method from AS

- instance_variables return symbols in 1.9
- there is instance_variable_defined? method

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/test/cases/associations/inner_join_association_test.rb b/activerecord/test/cases/associations/inner_join_association_test.rb
index cb777b9f78..4202d28061 100644
--- a/activerecord/test/cases/associations/inner_join_association_test.rb
+++ b/activerecord/test/cases/associations/inner_join_association_test.rb
@@ -67,7 +67,7 @@ class InnerJoinAssociationTest < ActiveRecord::TestCase
   def test_find_with_implicit_inner_joins_does_not_set_associations
     authors = Author.joins(:posts).select('authors.*')
     assert !authors.empty?, "expected authors to be non-empty"
-    assert authors.all? {|a| !a.send(:instance_variable_names).include?("@posts")}, "expected no authors to have the @posts association loaded"
+    assert authors.all? { |a| !a.instance_variable_defined?(:@posts) }, "expected no authors to have the @posts association loaded"
   end
 
   def test_count_honors_implicit_inner_joins