Use another class for the comparison.

`memsize_of(Object.new)` can be changed with past ivar creation
history for Object instances (another Object instance has 4 or
more ivars, next created Object instance has the area for the
ivars). So use antoher class for the comparison.

1 files changed, 2 insertions, 3 deletions

diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index 812b0817a8..8a0b6fba20 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -106,10 +106,9 @@ class TestObjSpace < Test::Unit::TestCase
   end
 
   def test_memsize_of_iseq
-    skip # To debug
-
     iseqw = RubyVM::InstructionSequence.compile('def a; a = :b; a; end')
-    base_obj_size = ObjectSpace.memsize_of(Object.new)
+    # Use anonymous class as a basic object size because size of Object.new can be increased
+    base_obj_size = ObjectSpace.memsize_of(Class.new.new) 
     assert_operator(ObjectSpace.memsize_of(iseqw), :>, base_obj_size)
   end