Fixed setNestedElement behaviour for empty keys array

Author: minwork

src/Arr.php

@@ -194,6 +194,12 @@ public static function setNestedElement(array $array, $keys, $value): array
     {
         $result = self::clone($array);
         $keysArray = self::getKeysArray($keys);
+
+        // If no keys specified then preserve array
+        if (empty($keysArray)) {
+            return $result;
+        }
+
         $tmp = &$result;
 
         while (count($keysArray) > 0) {

test/ArrTest.php

@@ -147,6 +147,9 @@ public function testSetNestedElement()
 
         $this->assertSame([[['test']]], Arr::setNestedElement([], '[].[].[]', 'test'));
         $this->assertSame([[[[]]]], Arr::setNestedElement([], '[].[].[]', []));
+        $this->assertSame([[[[]]]], Arr::setNestedElement([], ['[]','[]','[]'], []));
+        $this->assertSame([], Arr::setNestedElement([], [], 'test'));
+        $this->assertSame([], Arr::setNestedElement([], [null], 'test'));
 
         // Test alias
         $this->assertSame(Arr::setNestedElement([], '[].[].[]', 'test'), Arr::set([], '[].[].[]', 'test'));