hash.c: Add Hash#slice

* hash.c (rb_hash_slice): add Hash#slice [Feature #8499]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60229 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index ebc622a827..01b4f3a67d 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1006,6 +1006,14 @@ class TestHash < Test::Unit::TestCase
     assert_equal(nil, h.select!{true})
   end
 
+  def test_slice
+    h = @cls[1=>2,3=>4,5=>6]
+    assert_equal({1=>2, 3=>4}, h.slice(1, 3))
+    assert_equal({}, h.slice(7))
+    assert_equal({}, h.slice)
+    assert_equal({}, {}.slice)
+  end
+
   def test_clear2
     assert_equal({}, @cls[1=>2,3=>4,5=>6].clear)
     h = @cls[1=>2,3=>4,5=>6]