From f2d32fab77393c700b40d872866a62000174f6c9 Mon Sep 17 00:00:00 2001
From: Alexander Makarov <sam@rmcreative.ru>
Date: Wed, 20 May 2020 18:41:40 +0300
Subject: [PATCH] Fix #18046: Add test for current ArrayHelper::merge()
 behavior (#18054)

---
 tests/framework/helpers/ArrayHelperTest.php | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tests/framework/helpers/ArrayHelperTest.php b/tests/framework/helpers/ArrayHelperTest.php
index 203b86424a..f4449aaa40 100644
--- a/tests/framework/helpers/ArrayHelperTest.php
+++ b/tests/framework/helpers/ArrayHelperTest.php
@@ -493,6 +493,17 @@ class ArrayHelperTest extends TestCase
         $this->assertEquals($expected, $result);
     }
 
+    public function testMergeWithNumericKeys()
+    {
+        $a = [10 => [1]];
+        $b = [10 => [2]];
+
+        $result = ArrayHelper::merge($a, $b);
+
+        $expected = [10 => [1], 11 => [2]];
+        $this->assertEquals($expected, $result);
+    }
+
     public function testMergeWithUnset()
     {
         $a = [