improve ArrayHelper::map tests

+ also test with callbacks

tests/framework/helpers/ArrayHelperTest.php

@@ -734,6 +734,44 @@ public function testMap()
                 '345' => 'ccc',
             ],
         ], $result);
+
+        $result = ArrayHelper::map($array,
+            static function (array $group) {
+                return $group['id'] . $group['name'];
+            },
+            static function (array $group) {
+                return $group['name'] . $group['class'];
+            }
+        );
+
+        $this->assertEquals([
+            '123aaa' => 'aaax',
+            '124bbb' => 'bbbx',
+            '345ccc' => 'cccy',
+        ], $result);
+
+        $result = ArrayHelper::map($array,
+            static function (array $group) {
+                return $group['id'] . $group['name'];
+            },
+            static function (array $group) {
+                return $group['name'] . $group['class'];
+            },
+            static function (array $group) {
+                return $group['class'] . '-' . $group['class'];
+            }
+        );
+
+        $this->assertEquals([
+            'x-x' => [
+                '123aaa' => 'aaax',
+                '124bbb' => 'bbbx',
+            ],
+            'y-y' => [
+                '345ccc' => 'cccy',
+            ],
+        ], $result);
+
     }
 
     public function testKeyExists()
@@ -759,7 +797,7 @@ public function testKeyExistsWithFloat()
         if (version_compare(PHP_VERSION, '8.1.0', '>=')) {
             $this->markTestSkipped('Using floats as array key is deprecated.');
         }
-        
+
         $array = [
             1 => 3,
             2.2 => 4, // Note: Floats are cast to ints, which means that the fractional part will be truncated.