From a6753428280d24eee2e90a3cbe3c6d1cf89c8f14 Mon Sep 17 00:00:00 2001
From: Norman Huth <norman@huth.it>
Date: Mon, 18 Dec 2023 19:19:55 +0100
Subject: [PATCH] add test for array key map method

---
 tests/Support/SupportArrTest.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/Support/SupportArrTest.php b/tests/Support/SupportArrTest.php
index a539eb4b2b02..6065d7fde70b 100644
--- a/tests/Support/SupportArrTest.php
+++ b/tests/Support/SupportArrTest.php
@@ -700,6 +700,16 @@ public function testMap()
         $this->assertEquals(['first' => 'taylor', 'last' => 'otwell'], $data);
     }
 
+    public function testKeyMap()
+    {
+        $data = ['First' => 'taylor', 'Last' => 'otwell'];
+        $mapped = Arr::keyMap(function ($key) {
+            return strtolower($key);
+        }, $data);
+        $this->assertEquals(['first' => 'taylor', 'last' => 'otwell'], $mapped);
+        $this->assertEquals(['First' => 'taylor', 'Last' => 'otwell'], $data);
+    }
+
     public function testMapWithKeys()
     {
         $data = [