add a test.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@15187 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 31 insertions, 0 deletions

diff --git a/test/ruby/test_utf16.rb b/test/ruby/test_utf16.rb
index 3ffc8b86e..474e7e8ac 100644
--- a/test/ruby/test_utf16.rb
+++ b/test/ruby/test_utf16.rb
@@ -10,6 +10,33 @@ class TestUTF16 < Test::Unit::TestCase
     end
   end
 
+  def enccall(recv, meth, *args)
+    desc = ''
+    if String === recv
+      desc << encdump(recv)
+    else
+      desc << recv.inspect
+    end
+    desc << '.' << meth.to_s
+    if !args.empty?
+      desc << '('
+      args.each_with_index {|a, i|
+        desc << ',' if 0 < i
+        if String === a
+          desc << encdump(a)
+        else
+          desc << a.inspect
+        end
+      }
+      desc << ')'
+    end
+    result = nil
+    assert_nothing_raised(desc) {
+      result = recv.send(meth, *args)
+    }
+    result
+  end
+
   # tests start
 
   def test_utf16be_valid_encoding
@@ -72,4 +99,8 @@ class TestUTF16 < Test::Unit::TestCase
       "a#{s}"
     }
   end
+
+  def test_slice!
+    enccall("aa".force_encoding("UTF-16BE"), :slice!, -1)
+  end
 end