test/ruby: independent from pathname

* test/ruby/test_dir.rb (TestDir#setup): remove dependency on pathname.

* test/ruby/test_rubyoptions.rb (TestRubyOptions#with_tmpchdir): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41753 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_dir.rb

@@ -2,14 +2,13 @@ require 'test/unit'
 
 require 'tmpdir'
 require 'fileutils'
-require 'pathname'
 
 class TestDir < Test::Unit::TestCase
 
   def setup
     @verbose = $VERBOSE
     $VERBOSE = nil
-    @root = Pathname.new(Dir.mktmpdir('__test_dir__')).realpath.to_s
+    @root = File.realpath(Dir.mktmpdir('__test_dir__'))
     @nodir = File.join(@root, "dummy")
     for i in ?a..?z
       if i.ord % 2 == 0

test/ruby/test_rubyoptions.rb

@@ -3,7 +3,6 @@ require 'test/unit'
 
 require 'tmpdir'
 require 'tempfile'
-require 'pathname'
 
 require_relative 'envutil'
 
@@ -16,7 +15,7 @@ class TestRubyOptions < Test::Unit::TestCase
 
   def with_tmpchdir
     Dir.mktmpdir {|d|
-      d = Pathname.new(d).realpath.to_s
+      d = File.realpath(d)
       Dir.chdir(d) {
         yield d
       }