1 files changed, 17 insertions, 0 deletions
diff --git a/test/prism/memsize_test.rb b/test/prism/memsize_test.rb
new file mode 100644
index 0000000000..d7e1448dbc
--- /dev/null
+++ b/test/prism/memsize_test.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require_relative "test_helper"
+
+return if Prism::BACKEND == :FFI
+
+module Prism
+  class MemsizeTest < TestCase
+    def test_memsize
+      result = Debug.memsize("2 + 3")
+
+      assert_equal 5, result[:length]
+      assert_kind_of Integer, result[:memsize]
+      assert_equal 6, result[:node_count]
+    end
+  end
+end