1 files changed, 46 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-buffer-inheritance.js b/tests/node_compat/test/parallel/test-buffer-inheritance.js
new file mode 100644
index 000000000..6440a84cb
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-buffer-inheritance.js
@@ -0,0 +1,46 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
+
+'use strict';
+
+require('../common');
+const assert = require('assert');
+
+
+function T(n) {
+  const ui8 = new Uint8Array(n);
+  Object.setPrototypeOf(ui8, T.prototype);
+  return ui8;
+}
+Object.setPrototypeOf(T.prototype, Buffer.prototype);
+Object.setPrototypeOf(T, Buffer);
+
+T.prototype.sum = function sum() {
+  let cntr = 0;
+  for (let i = 0; i < this.length; i++)
+    cntr += this[i];
+  return cntr;
+};
+
+
+const vals = [new T(4), T(4)];
+
+vals.forEach(function(t) {
+  assert.strictEqual(t.constructor, T);
+  assert.strictEqual(Object.getPrototypeOf(t), T.prototype);
+  assert.strictEqual(Object.getPrototypeOf(Object.getPrototypeOf(t)),
+                     Buffer.prototype);
+
+  t.fill(5);
+  let cntr = 0;
+  for (let i = 0; i < t.length; i++)
+    cntr += t[i];
+  assert.strictEqual(cntr, t.length * 5);
+
+  // Check this does not throw
+  t.toString();
+});