1 files changed, 5 insertions, 0 deletions
diff --git a/test/ruby/test_range.rb b/test/ruby/test_range.rb
index 2bff105936..431ed0dc30 100644
--- a/test/ruby/test_range.rb
+++ b/test/ruby/test_range.rb
@@ -631,4 +631,9 @@ class TestRange < Test::Unit::TestCase
     end
     (a.."c").each {|x, &b| assert_nil(b)}
   end
+
+  def test_sum
+    assert_equal(55, (1..10).sum)
+    assert_equal(110, (1..10).sum {|v| v * 2 })
+  end
 end