From b132f72b3f457fae0507996879f00764c0965d4d Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 24 Dec 2007 10:22:34 +0000
Subject: [PATCH] add tests.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14599 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io_m17n.rb | 81 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index 4fdbc1a2ac..1087d182ae 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -44,6 +44,87 @@ EOT
     assert_block(full_message) { expected == actual }
   end
 
+  def test_open_r
+    with_tmpdir {
+      generate_file('tmp', "")
+      open("tmp", "r") {|f|
+        assert_equal(nil, f.external_encoding)
+        assert_equal(nil, f.internal_encoding)
+      }
+    }
+  end
+
+  def test_open_r_enc
+    with_tmpdir {
+      generate_file('tmp', "")
+      open("tmp", "r:euc-jp") {|f|
+        assert_equal(Encoding::EUC_JP, f.external_encoding)
+        assert_equal(nil, f.internal_encoding)
+      }
+    }
+  end
+
+  def test_open_r_enc_enc
+    with_tmpdir {
+      generate_file('tmp', "")
+      open("tmp", "r:euc-jp:utf-8") {|f|
+        assert_equal(Encoding::EUC_JP, f.external_encoding)
+        assert_equal(Encoding::UTF_8, f.internal_encoding)
+      }
+    }
+  end
+
+  def test_open_w
+    with_tmpdir {
+      open("tmp", "w") {|f|
+        assert_equal(nil, f.external_encoding)
+        assert_equal(nil, f.internal_encoding)
+      }
+    }
+  end
+
+  def test_open_w_enc
+    with_tmpdir {
+      open("tmp", "w:euc-jp") {|f|
+        assert_equal(Encoding::EUC_JP, f.external_encoding)
+        assert_equal(nil, f.internal_encoding)
+      }
+    }
+  end
+
+  def test_open_w_enc_enc
+    with_tmpdir {
+      open("tmp", "w:euc-jp:utf-8") {|f|
+        assert_equal(Encoding::EUC_JP, f.external_encoding)
+        assert_equal(Encoding::UTF_8, f.internal_encoding)
+      }
+    }
+  end
+
+  def test_open_w_enc
+    with_tmpdir {
+      open("tmp", "w:euc-jp") {|f|
+        assert_equal(Encoding::EUC_JP, f.external_encoding)
+        assert_equal(nil, f.internal_encoding)
+      }
+    }
+  end
+
+  def test_stdin
+    assert_equal(Encoding.default_external, STDIN.external_encoding)
+    assert_equal(nil, STDIN.internal_encoding)
+  end
+
+  def test_stdout
+    assert_equal(nil, STDOUT.external_encoding)
+    assert_equal(nil, STDOUT.internal_encoding)
+  end
+
+  def test_stderr
+    assert_equal(nil, STDERR.external_encoding)
+    assert_equal(nil, STDERR.internal_encoding)
+  end
+
   def test_terminator_conversion
     with_tmpdir {
       generate_file('tmp', "before \u00FF after")