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diff --git a/jni/ruby/lib/rdoc/test_case.rb b/jni/ruby/lib/rdoc/test_case.rb
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+++ b/jni/ruby/lib/rdoc/test_case.rb
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+require 'rubygems'
+
+begin
+  gem 'minitest', '~> 4.0' unless defined?(Test::Unit)
+rescue NoMethodError, Gem::LoadError
+  # for ruby tests
+end
+
+require 'minitest/autorun'
+require 'minitest/benchmark' if ENV['BENCHMARK']
+
+require 'fileutils'
+require 'pp'
+require 'tempfile'
+require 'tmpdir'
+require 'stringio'
+
+require 'rdoc'
+
+##
+# RDoc::TestCase is an abstract TestCase to provide common setup and teardown
+# across all RDoc tests.  The test case uses minitest, so all the assertions
+# of minitest may be used.
+#
+# The testcase provides the following:
+#
+# * A reset code-object tree
+# * A reset markup preprocessor (RDoc::Markup::PreProcess)
+# * The <code>@RM</code> alias of RDoc::Markup (for less typing)
+# * <code>@pwd</code> containing the current working directory
+# * FileUtils, pp, Tempfile, Dir.tmpdir and StringIO
+
+class RDoc::TestCase < MiniTest::Unit::TestCase
+
+  ##
+  # Abstract test-case setup
+
+  def setup
+    super
+
+    @top_level = nil
+
+    @have_encoding = Object.const_defined? :Encoding
+
+    @RM = RDoc::Markup
+
+    RDoc::Markup::PreProcess.reset
+
+    @pwd = Dir.pwd
+
+    @store = RDoc::Store.new
+
+    @rdoc = RDoc::RDoc.new
+    @rdoc.store = @store
+    @rdoc.options = RDoc::Options.new
+
+    g = Object.new
+    def g.class_dir() end
+    def g.file_dir() end
+    @rdoc.generator = g
+  end
+
+  ##
+  # Asserts +path+ is a file
+
+  def assert_file path
+    assert File.file?(path), "#{path} is not a file"
+  end
+
+  ##
+  # Asserts +path+ is a directory
+
+  def assert_directory path
+    assert File.directory?(path), "#{path} is not a directory"
+  end
+
+  ##
+  # Refutes +path+ exists
+
+  def refute_file path
+    refute File.exist?(path), "#{path} exists"
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::BlankLine.new
+
+  def blank_line
+    @RM::BlankLine.new
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::BlockQuote.new with +contents+
+
+  def block *contents
+    @RM::BlockQuote.new(*contents)
+  end
+
+  ##
+  # Creates an RDoc::Comment with +text+ which was defined on +top_level+.
+  # By default the comment has the 'rdoc' format.
+
+  def comment text, top_level = @top_level
+    RDoc::Comment.new text, top_level
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::Document.new with +contents+
+
+  def doc *contents
+    @RM::Document.new(*contents)
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::HardBreak.new
+
+  def hard_break
+    @RM::HardBreak.new
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::Heading.new with +level+ and +text+
+
+  def head level, text
+    @RM::Heading.new level, text
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::ListItem.new with +label+ and +parts+
+
+  def item label = nil, *parts
+    @RM::ListItem.new label, *parts
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::List.new with +type+ and +items+
+
+  def list type = nil, *items
+    @RM::List.new type, *items
+  end
+
+  ##
+  # Enables pretty-print output
+
+  def mu_pp obj # :nodoc:
+    s = ''
+    s = PP.pp obj, s
+    s = s.force_encoding Encoding.default_external if defined? Encoding
+    s.chomp
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::Paragraph.new with +contents+
+
+  def para *a
+    @RM::Paragraph.new(*a)
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::Rule.new with +weight+
+
+  def rule weight
+    @RM::Rule.new weight
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::Raw.new with +contents+
+
+  def raw *contents
+    @RM::Raw.new(*contents)
+  end
+
+  ##
+  # Creates a temporary directory changes the current directory to it for the
+  # duration of the block.
+  #
+  # Depends upon Dir.mktmpdir
+
+  def temp_dir
+    skip "No Dir::mktmpdir, upgrade your ruby" unless Dir.respond_to? :mktmpdir
+
+    Dir.mktmpdir do |temp_dir|
+      Dir.chdir temp_dir do
+        yield temp_dir
+      end
+    end
+  end
+
+  ##
+  # Shortcut for RDoc::Markup::Verbatim.new with +parts+
+
+  def verb *parts
+    @RM::Verbatim.new(*parts)
+  end
+
+  ##
+  # run capture_io with setting $VERBOSE = true
+
+  def verbose_capture_io
+    capture_io do
+      begin
+        orig_verbose = $VERBOSE
+        $VERBOSE = true
+        yield
+      ensure
+        $VERBOSE = orig_verbose
+      end
+    end
+  end
+end
+
+# This hack allows autoload to work when Dir.pwd is changed for Ruby 1.8 since
+# -I paths are not expanded.
+$LOAD_PATH.each do |load_path|
+  break if load_path[0] == ?/
+  load_path.replace File.expand_path load_path
+end if RUBY_VERSION < '1.9'
+