1 files changed, 32 insertions, 0 deletions
diff --git a/test/parallel/test-buffer-zero-fill-cli.js b/test/parallel/test-buffer-zero-fill-cli.js
new file mode 100644
index 0000000000..91679498a1
--- /dev/null
+++ b/test/parallel/test-buffer-zero-fill-cli.js
@@ -0,0 +1,32 @@
+'use strict';
+// Flags: --zero-fill-buffers
+
+// when using --zero-fill-buffers, every Buffer and SlowBuffer
+// instance must be zero filled upon creation
+
+require('../common');
+const SlowBuffer = require('buffer').SlowBuffer;
+const assert = require('assert');
+
+function isZeroFilled(buf) {
+  for (let n = 0; n < buf.length; n++)
+    if (buf[n] > 0) return false;
+  return true;
+}
+
+// This can be somewhat unreliable because the
+// allocated memory might just already happen to
+// contain all zeroes. The test is run multiple
+// times to improve the reliability.
+for (let i = 0; i < 50; i++) {
+  const bufs = [
+    Buffer.alloc(20),
+    Buffer.allocUnsafe(20),
+    SlowBuffer(20),
+    Buffer(20),
+    new SlowBuffer(20)
+  ];
+  for (const buf of bufs) {
+    assert(isZeroFilled(buf));
+  }
+}