From: Tanaka Akira <akr@...17n.org>
Date: 2005-01-01T22:53:23+09:00
Subject: [ruby-dev:25383] test_copy_entry(TestFileUtils) fail: entry data/all != tmp/all

make test-all で次の失敗に出会いました。

  1) Failure:
test_copy_entry(TestFileUtils)
    [/home/akr/ruby/head-ruby/ruby/test/fileutils/fileasserts.rb:17:in `assert_same_entry'
     /home/akr/ruby/head-ruby/ruby/test/fileutils/fileasserts.rb:16:in `_wrap_assertion'
     /home/akr/ruby/head-ruby/ruby/test/fileutils/fileasserts.rb:16:in `assert_same_entry'
     ./fileutils/test_fileutils.rb:754:in `test_copy_entry'
     ./fileutils/test_fileutils.rb:751:in `each_sample_file'
     ./fileutils/test_fileutils.rb:145:in `each'
     ./fileutils/test_fileutils.rb:145:in `each_sample_file'
     ./fileutils/test_fileutils.rb:751:in `test_copy_entry']:
entry data/all != tmp/all

調べてみると、

Index: lib/fileutils.rb
===================================================================
RCS file: /src/ruby/lib/fileutils.rb,v
retrieving revision 1.51
diff -u -p -r1.51 fileutils.rb
--- lib/fileutils.rb	1 Jan 2005 08:59:48 -0000	1.51
+++ lib/fileutils.rb	1 Jan 2005 13:51:22 -0000
@@ -507,6 +507,7 @@ module FileUtils
 
     def _copy_content(src, dest)
       st = stat(src)
+      sleep 2
       File.open(src,  'rb') {|r|
         File.open(dest, 'wb', st.mode) {|w|
           fu_copy_stream0 r, w, (fu_blksize(st) || fu_default_blksize())

という変更を加えて、次のようにすると再現するようです。

% ./ruby -Ilib test/runner.rb test/fileutils/test_fileutils.rb -n test_copy_entry
Loaded suite test_fileutils.rb
Started
F
Finished in 2.011766 seconds.

  1) Failure:
test_copy_entry(TestFileUtils)
    [/home/akr/ruby/tmp-ruby/ruby/test/fileutils/fileasserts.rb:17:in `assert_same_entry'
     /home/akr/ruby/tmp-ruby/ruby/test/fileutils/fileasserts.rb:16:in `_wrap_assertion'
     /home/akr/ruby/tmp-ruby/ruby/test/fileutils/fileasserts.rb:16:in `assert_same_entry'
     ./test/fileutils/test_fileutils.rb:754:in `test_copy_entry'
     ./test/fileutils/test_fileutils.rb:751:in `each_sample_file'
     ./test/fileutils/test_fileutils.rb:145:in `each'
     ./test/fileutils/test_fileutils.rb:145:in `each_sample_file'
     ./test/fileutils/test_fileutils.rb:751:in `test_copy_entry']:
entry data/a != tmp/a

1 tests, 2 assertions, 1 failures, 0 errors

sleep をいれて失敗するようになるのは変なんじゃないでしょうか。
-- 
[田中 哲][たなか あきら][Tanaka Akira]