1 files changed, 31 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-buffer-safe-unsafe.js b/tests/node_compat/test/parallel/test-buffer-safe-unsafe.js
new file mode 100644
index 000000000..180af8993
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-buffer-safe-unsafe.js
@@ -0,0 +1,31 @@
+// 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');
+
+const safe = Buffer.alloc(10);
+
+function isZeroFilled(buf) {
+  for (let n = 0; n < buf.length; n++)
+    if (buf[n] !== 0) return false;
+  return true;
+}
+
+assert(isZeroFilled(safe));
+
+// Test that unsafe allocations doesn't affect subsequent safe allocations
+Buffer.allocUnsafe(10);
+assert(isZeroFilled(new Float64Array(10)));
+
+new Buffer(10);
+assert(isZeroFilled(new Float64Array(10)));
+
+Buffer.allocUnsafe(10);
+assert(isZeroFilled(Buffer.alloc(10)));