From 78db46b31c4472291f4e45cf0374853ac3c5740a Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 24 Apr 2010 05:42:50 +0000
Subject: * io.c: raise IOError when byte oriented operations occur with  
 non-empty character buffer.   [ruby-dev:40493] [ruby-dev:40506]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27470 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io_m17n.rb | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index 1220170e1b..98a52939d0 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -1741,5 +1741,38 @@ EOT
       end
     }
   end
+
+  def test_cbuf
+    with_tmpdir {
+      fn = "tst"
+      open(fn, "w") {|f| f.print "foo" }
+      open(fn, "r+t") {|f|
+        f.ungetc(f.getc)
+        assert_raise(IOError, "[ruby-dev:40493]") { f.readpartial(2) }
+        assert_raise(IOError) { f.read(2) }
+        assert_raise(IOError) { f.each_byte {|c| } }
+        assert_raise(IOError) { f.getbyte }
+        assert_raise(IOError) { f.ungetbyte(0) }
+        assert_raise(IOError) { f.sysread(2) }
+        assert_raise(IOError) { IO.copy_stream(f, "tmpout") }
+        assert_raise(IOError) { f.sysseek(2) }
+      }
+      open(fn, "r+t") {|f|
+        f.ungetc(f.getc)
+        assert_equal("foo", f.read)
+      }
+    }
+  end
+
+  def test_text_mode_ungetc_eof
+    with_tmpdir {
+      open("ff", "w") {|f| }
+      open("ff", "rt") {|f|
+        f.ungetc "a"
+        assert(!f.eof?, "[ruby-dev:40506] (3)")
+      }
+    }
+  end
+
 end
 
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