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-rw-r--r--bootstraptest/test_io.rb17
1 files changed, 17 insertions, 0 deletions
diff --git a/bootstraptest/test_io.rb b/bootstraptest/test_io.rb
index a5d54afc5b5..4974a1eeb92 100644
--- a/bootstraptest/test_io.rb
+++ b/bootstraptest/test_io.rb
@@ -52,3 +52,20 @@ assert_equal 'ok', %q{
File.unlink(tmpname)
:ok
}
+
+assert_equal 'ok', %q{
+ require 'tmpdir'
+ begin
+ tmpname = "#{Dir.tmpdir}/ruby-btest-#{$$}-#{rand(0x100000000).to_s(36)}"
+ rw = File.open(tmpname, File::RDWR|File::CREAT|File::EXCL)
+ rescue Errno::EEXIST
+ retry
+ end
+ save = STDIN.dup
+ STDIN.reopen(rw)
+ STDIN.print "a"
+ STDIN.reopen(save)
+ rw.close
+ File.unlink(tmpname)
+ :ok
+}