Windows symlink detection attempt

Gemfile

@@ -23,6 +23,7 @@ mime_version =
   end
 
 gem 'mime-types', "~> #{mime_version}"
+gem 'win32-file', '~> 0.8', platforms: [ :mswin, :mingw, :x64_mingw ]
 
 gemspec :name => 'minitar'
 

test/support/tar_test_helpers.rb

@@ -1,5 +1,10 @@
 # frozen_string_literal: true
 
+require 'minitar'
+require 'win32/file' if Archive::Tar::Minitar.windows?
+require 'base64'
+require 'zlib'
+
 module TarTestHelpers
   private
 

test/test_tar_input.rb

@@ -1,9 +1,6 @@
 #!/usr/bin/env ruby
 
-require 'minitar'
 require 'minitest_helper'
-require 'base64'
-require 'zlib'
 
 class TestTarInput < Minitest::Test
   include TarTester
@@ -134,7 +131,7 @@ def test_extract_entry_works
   end
 
   def test_extract_entry_breaks_symlinks
-    return if Minitar.windows?
+    return if Minitar.windows? && !defined?(Windows::File::Functions)
 
     IO.write('data__/file4', '')
     File.symlink('data__/file4', 'data__/file3')