Implement Enumerable#sum

* enum.c (enum_sum): Implement Enumerable#sum.

* test/ruby/test_enum.rb (test_sum): Test sum for Enumerable.

* test/ruby/test_hash.rb (test_sum): Test sum for Hash.

* test/ruby/test_range.rb (test_sum): Test sum for Range.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55032 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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