Make IO#write accept multiple arguments

io.c: make IO#write accept multiple arguments.
it uses writev(2) if possible.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60343 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 26 insertions, 0 deletions

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 402d497896..c7c4129e3e 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1216,6 +1216,32 @@ class TestIO < Test::Unit::TestCase
     end)
   end
 
+  def test_write_with_multiple_arguments
+    pipe(proc do |w|
+      w.write("foo", "bar")
+      w.close
+    end, proc do |r|
+      assert_equal("foobar", r.read)
+    end)
+  end
+
+  def test_write_with_many_arguments
+    pipe(proc do |w|
+      w.write(*(["a"] * 1023))
+      w.close
+    end, proc do |r|
+      assert_equal("a" * 1023, r.read)
+    end)
+  end
+
+  def test_write_with_too_many_arguments
+    with_pipe do |r, w|
+      assert_raise(ArgumentError) do
+        w.write(*(["a"] * 1024))
+      end
+    end
+  end
+
   def test_write_non_writable
     with_pipe do |r, w|
       assert_raise(IOError) do