* array.c: Support for Enumerator#size in trivial cases:

  each, each_index, reverse_each, sort_by, collect,
  collect!, select, select!, keep_if, reject, reject!, delete_if
  [Feature #6636]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37500 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 0 deletions

diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index 3143be21a0..c276455a01 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -420,5 +420,14 @@ class TestEnumerator < Test::Unit::TestCase
     assert_equal 42, enum.with_index.size
     assert_equal 42, enum.with_object(:foo).size
   end
+
+  def test_size_for_enum_created_from_array
+    arr = %w[hello world]
+    %i[each each_with_index reverse_each sort_by! sort_by map map!
+      keep_if reject! reject select! select delete_if].each do |method|
+      assert_equal arr.size, arr.send(method).size
+    end
+  end
+
 end