[11.x] Adds support for enums on mapInto collection method (#51027)

* [11.x] Adds support for enums on `mapInto` collection method.

* [11.x] Adds support for enums on `mapInto` collection method.

* [11.x] Adds support for enums on `mapInto` collection method.

* [11.x] Adds support for enums on `mapInto` collection method.

Author: lukeraymonddowning

src/Illuminate/Collections/Traits/EnumeratesValues.php

@@ -2,6 +2,7 @@
 
 namespace Illuminate\Support\Traits;
 
+use BackedEnum;
 use CachingIterator;
 use Closure;
 use Exception;
@@ -410,6 +411,10 @@ public function flatMap(callable $callback)
      */
     public function mapInto($class)
     {
+        if (is_subclass_of($class, BackedEnum::class)) {
+            return $this->map(fn ($value, $key) => $class::from($value));
+        }
+
         return $this->map(fn ($value, $key) => new $class($value, $key));
     }
 

tests/Support/Enums.php

@@ -12,3 +12,9 @@ enum TestBackedEnum: int
     case A = 1;
     case B = 2;
 }
+
+enum TestStringBackedEnum: string
+{
+    case A = 'A';
+    case B = 'B';
+}

tests/Support/SupportCollectionTest.php

@@ -2961,6 +2961,32 @@ public function testMapInto($collection)
         $this->assertSame('second', $data->get(1)->value);
     }
 
+    #[DataProvider('collectionClassProvider')]
+    public function testMapIntoWithIntBackedEnums($collection)
+    {
+        $data = new $collection([
+            1, 2,
+        ]);
+
+        $data = $data->mapInto(TestBackedEnum::class);
+
+        $this->assertSame(TestBackedEnum::A, $data->get(0));
+        $this->assertSame(TestBackedEnum::B, $data->get(1));
+    }
+
+    #[DataProvider('collectionClassProvider')]
+    public function testMapIntoWithStringBackedEnums($collection)
+    {
+        $data = new $collection([
+            'A', 'B',
+        ]);
+
+        $data = $data->mapInto(TestStringBackedEnum::class);
+
+        $this->assertSame(TestStringBackedEnum::A, $data->get(0));
+        $this->assertSame(TestStringBackedEnum::B, $data->get(1));
+    }
+
     #[DataProvider('collectionClassProvider')]
     public function testNth($collection)
     {