* lib/fileutils.rb: Revert r34669 which altered the way

metaprogramming in FileUtils occurred.  [ruby-trunk - Bug #7958]

* test/fileutils/visibility_tests.rb:  Refactored tests of FileUtils
  options modules to expose bug found in #7958
* test/fileutils/test_dryrun.rb:  ditto.
* test/fileutils/test_nowrite.rb:  ditto.
* test/fileutils/test_verbose.rb:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39544 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/fileutils/visibility_tests.rb

@@ -0,0 +1,41 @@
+require 'test/unit'
+require 'fileutils'
+
+class TestFileUtils < Test::Unit::TestCase
+end
+
+##
+# These tests are reused in the FileUtils::Verbose, FileUtils::NoWrite and
+# FileUtils::DryRun tests
+
+module TestFileUtils::Visibility
+
+  FileUtils::METHODS.each do |m|
+    define_method "test_singleton_visibility_#{m}" do
+      assert @fu_module.respond_to?(m, true),
+             "FileUtils::Verbose.#{m} is not defined"
+      assert @fu_module.respond_to?(m, false),
+             "FileUtils::Verbose.#{m} is not public"
+    end
+
+    define_method "test_visibility_#{m}" do
+      assert respond_to?(m, true),
+             "FileUtils::Verbose\##{m} is not defined"
+      assert @fu_module.private_method_defined?(m),
+             "FileUtils::Verbose\##{m} is not private"
+    end
+  end
+
+  FileUtils::StreamUtils_.private_instance_methods.each do |m|
+    define_method "test_singleton_visibility_#{m}" do
+      assert @fu_module.respond_to?(m, true),
+             "FileUtils::Verbose\##{m} is not defined"
+    end
+
+    define_method "test_visibility_#{m}" do
+      assert respond_to?(m, true),
+             "FileUtils::Verbose\##{m} is not defined"
+    end
+  end
+
+end