From ac4356117108ea80811f4fe7051c6b61b8477ab2 Mon Sep 17 00:00:00 2001
From: Nikita Skovoroda <chalkerx@gmail.com>
Date: Thu, 30 Oct 2025 02:34:55 +0400
Subject: [PATCH 1/2] [test] Add cross-tests between native and fallback

---
 test/test.js | 41 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/test/test.js b/test/test.js
index 2ddcb17..5920389 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1,8 +1,12 @@
 'use strict';
 
 const { deepStrictEqual } = require('assert');
+const { randomBytes } = require('crypto');
 const { join } = require('path');
 
+const native = require('node-gyp-build')(join(__dirname, '..'));
+const fallback = require('../fallback');
+
 function use(bufferUtil) {
   return function () {
     it('masks a buffer (1/2)', function () {
@@ -44,5 +48,38 @@ function use(bufferUtil) {
   };
 }
 
-describe('bindings', use(require('node-gyp-build')(join(__dirname, '..'))));
-describe('fallback', use(require('../fallback')));
+describe('bindings', use(native));
+describe('fallback', use(fallback));
+
+describe('bindings match fallback', () => {
+  const sizes = [1, 127, 128, 200, 1024, 10 * 1024 - 1, 10 * 1024]
+  const offsets = [0, 1, 10, 16, 128]
+
+  it('masks', function () {
+    for (const size of sizes) {
+      for (const offset of offsets) {
+        const src = randomBytes(size);
+        const mask = randomBytes(4);
+        const dest = randomBytes(size + offset);
+        const destFallback = Buffer.from(dest);
+
+        native.mask(src, mask, dest, offset, size);
+        fallback.mask(src, mask, destFallback, offset, size);
+
+        deepStrictEqual(dest, destFallback);
+      }
+    }
+  });
+
+  it('unmasks', function () {
+    for (const size of sizes) {
+      const buf = randomBytes(size);
+      const mask = randomBytes(4);
+
+      deepStrictEqual(
+        native.unmask(buf, mask),
+        fallback.unmask(buf, mask)
+      );
+    }
+  });
+})

From 7391c251727b7d7efd090e3e75876b0a11ca51ed Mon Sep 17 00:00:00 2001
From: Nikita Skovoroda <chalkerx@gmail.com>
Date: Fri, 31 Oct 2025 18:53:32 +0300
Subject: [PATCH 2/2] Update test/test.js

Co-authored-by: Luigi Pinca <luigipinca@gmail.com>
---
 test/test.js | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/test/test.js b/test/test.js
index 5920389..d6241cb 100644
--- a/test/test.js
+++ b/test/test.js
@@ -73,13 +73,14 @@ describe('bindings match fallback', () => {
 
   it('unmasks', function () {
     for (const size of sizes) {
-      const buf = randomBytes(size);
+      const buf1 = randomBytes(size);
+      const buf2 = Buffer.from(buf1);
       const mask = randomBytes(4);
 
-      deepStrictEqual(
-        native.unmask(buf, mask),
-        fallback.unmask(buf, mask)
-      );
+      native.unmask(buf1, mask);
+      fallback.unmask(buf2, mask);
+
+      deepStrictEqual(buf1, buf2);
     }
   });
 })