1 files changed, 27 insertions, 0 deletions
diff --git a/test/fiddle/test_pinned.rb b/test/fiddle/test_pinned.rb
new file mode 100644
index 0000000000..5bfae2172a
--- /dev/null
+++ b/test/fiddle/test_pinned.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+begin
+  require_relative 'helper'
+rescue LoadError
+end
+
+module Fiddle
+  class TestPinned < Fiddle::TestCase
+    def test_pin_object
+      x = Object.new
+      pinner = Pinned.new x
+      assert_same x, pinner.ref
+    end
+
+    def test_clear
+      pinner = Pinned.new Object.new
+      refute pinner.cleared?
+      pinner.clear
+      assert pinner.cleared?
+      ex = assert_raise(Fiddle::ClearedReferenceError) do
+        pinner.ref
+      end
+      assert_match "called on", ex.message
+    end
+  end
+end
+