* test/zlib/test_zlib.rb: new file.

(TestZlibGzipWriter#test_new_nil): test for [ruby-dev:23228].


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6099 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/zlib/test_zlib.rb

@@ -0,0 +1,16 @@
+require 'test/unit/testsuite'
+require 'test/unit/testcase'
+
+require 'zlib'
+
+class TestZlibGzipWriter < Test::Unit::TestCase
+  def test_new_nil # [ruby-dev:23228]
+    old = $VERBOSE
+    $VERBOSE = nil
+    begin
+      assert_raises(NoMethodError) { Zlib::GzipWriter.new(nil).close }
+    ensure
+      $VERBOSE = old
+    end
+  end
+end