From a16e0c29db3d5c7555362956ba62ea8f84f00cc7 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 20 Apr 2008 03:51:57 +0000
Subject: * io.c (copy_stream_fallback): read directly (bypassing readpartial) 
  if possible.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@16088 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io.rb | 47 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 44 insertions(+), 3 deletions(-)

(limited to 'test')

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index d2292446fd..1fa164566b 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -417,9 +417,50 @@ class TestIO < Test::Unit::TestCase
 
   def test_copy_stream_strio_off
     src = StringIO.new("abcd")
-    dst = StringIO.new
-    assert_raise(ArgumentError) {
-      IO.copy_stream(src, dst, 3, 1)
+    with_pipe {|r, w|
+      assert_raise(ArgumentError) {
+        IO.copy_stream(src, w, 3, 1)
+      }
+    }
+  end
+
+  def test_copy_stream_non_io
+    mkcdtmpdir {|d|
+      # filename to StringIO
+      File.open("foo", "w") {|f| f << "abcd" }
+      src = "foo"
+      dst = StringIO.new
+      ret = IO.copy_stream(src, dst, 3)
+      assert_equal(3, ret)
+      assert_equal("abc", dst.string)
+
+      # StringIO to filename
+      src = StringIO.new("abcd")
+      ret = File.open("fooo", "w") {|dst|
+        IO.copy_stream(src, dst, 3)
+      }
+      assert_equal(3, ret)
+      assert_equal("abc", dst.string)
+      assert_equal(3, src.pos)
+
+      # IO to StringIO
+      File.open("bar", "w") {|f| f << "abcd" }
+      File.open("bar") {|src|
+        dst = StringIO.new
+        ret = IO.copy_stream(src, dst, 3)
+        assert_equal(3, ret)
+        assert_equal("abc", dst.string)
+        assert_equal(3, src.pos)
+      }
+
+      # StringIO to IO
+      src = StringIO.new("abcd")
+      ret = File.open("baz", "w") {|dst|
+        IO.copy_stream(src, dst, 3)
+      }
+      assert_equal(3, ret)
+      assert_equal("abc", File.read("baz"))
+      assert_equal(3, src.pos)
     }
   end
 
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