1 files changed, 18 insertions, 1 deletions
diff --git a/test/ruby/test_dir.rb b/test/ruby/test_dir.rb
index b86cf330bc..edb5210af1 100644
--- a/test/ruby/test_dir.rb
+++ b/test/ruby/test_dir.rb
@@ -641,6 +641,21 @@ class TestDir < Test::Unit::TestCase
         assert_equal("C:/ruby/homepath", Dir.home)
       end;
     end
+
+    def test_children_long_name
+      Dir.mktmpdir do |dirname|
+        longest_possible_component = "b" * 255
+        long_path = File.join(dirname, longest_possible_component)
+        Dir.mkdir(long_path)
+        File.write("#{long_path}/c", "")
+        assert_equal(%w[c], Dir.children(long_path))
+      ensure
+        File.unlink("#{long_path}/c")
+        Dir.rmdir(long_path)
+      end
+    rescue Errno::ENOENT
+      omit "File system does not support long file name"
+    end
   end
 
   def test_home
@@ -710,7 +725,9 @@ class TestDir < Test::Unit::TestCase
         assert_equal(new_dir.chdir{Dir.pwd}, for_fd_dir.chdir{Dir.pwd})
       ensure
         new_dir&.close
-        for_fd_dir&.close
+        if for_fd_dir
+          assert_raise(Errno::EBADF) { for_fd_dir.close }
+        end
       end
     else
       assert_raise(NotImplementedError) { Dir.for_fd(0) }