1 files changed, 27 insertions, 0 deletions
diff --git a/test/stringio/test_ractor.rb b/test/stringio/test_ractor.rb
new file mode 100644
index 0000000000..6acf53fb0a
--- /dev/null
+++ b/test/stringio/test_ractor.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+require 'test/unit'
+
+class TestStringIOInRactor < Test::Unit::TestCase
+  def setup
+    omit unless defined? Ractor
+  end
+
+  def test_ractor
+    assert_in_out_err([], <<-"end;", ["true"], [])
+      class Ractor
+        alias value take unless method_defined? :value # compat with Ruby 3.4 and olders
+      end
+
+      require "stringio"
+      $VERBOSE = nil
+      r = Ractor.new do
+        io = StringIO.new(+"")
+        io.puts "abc"
+        io.truncate(0)
+        io.puts "def"
+        "\0\0\0\0def\n" == io.string
+      end
+      puts r.value
+    end;
+  end
+end