From 5190926e40febeeb3822b8bd7c031b06279dc3f1 Mon Sep 17 00:00:00 2001
From: Samuel Williams <samuel.williams@oriontransfer.co.nz>
Date: Mon, 15 Nov 2021 15:28:02 +1300
Subject: Validate string type when constructing IO::Buffer for string mapping.

---
 test/ruby/test_io_buffer.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_io_buffer.rb b/test/ruby/test_io_buffer.rb
index 12937729f4..57d1867b25 100644
--- a/test/ruby/test_io_buffer.rb
+++ b/test/ruby/test_io_buffer.rb
@@ -81,6 +81,14 @@ class TestIOBuffer < Test::Unit::TestCase
     assert_equal "Hello World", string
   end
 
+  def test_non_string
+    not_string = Object.new
+
+    assert_raise TypeError do
+      IO::Buffer.for(not_string)
+    end
+  end
+
   def test_resize
     buffer = IO::Buffer.new(1024, IO::Buffer::MAPPED)
     buffer.resize(2048, 0)
-- 
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