1 files changed, 28 insertions, 0 deletions
diff --git a/test/json/test_json_ext_parser.rb b/test/json/test_json_ext_parser.rb
new file mode 100644
index 0000000000..5cd12f0dcb
--- /dev/null
+++ b/test/json/test_json_ext_parser.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: false
+require 'test_helper'
+
+class TestJSONExtParser < Test::Unit::TestCase
+  if defined?(JSON::Ext::Parser)
+    def test_allocate
+      parser = JSON::Ext::Parser.new("{}")
+      assert_raise(TypeError, '[ruby-core:35079]') do
+        parser.__send__(:initialize, "{}")
+      end
+      parser = JSON::Ext::Parser.allocate
+      assert_raise(TypeError, '[ruby-core:35079]') { parser.source }
+    end
+  end
+
+  if EnvUtil.gc_stress_to_class?
+    def assert_no_memory_leak(code, *rest, **opt)
+      code = "8.times {20_000.times {begin #{code}; rescue NoMemoryError; end}; GC.start}"
+      super(["-rjson/ext/parser"],
+            "GC.add_stress_to_class(JSON::Ext::Parser); "\
+            "#{code}", code, *rest, rss: true, limit: 1.1, **opt)
+    end
+
+    def test_no_memory_leak_allocate
+      assert_no_memory_leak("JSON::Ext::Parser.allocate")
+    end
+  end
+end