Merge pull request #18 from samsonasik/add-test

Add test for keep original data after Finder::last() called

tests/FinderTest.php

@@ -7,10 +7,15 @@
 use ArrayIterator;
 use ArrayLookup\Finder;
 use ArrayObject;
+use DateTime;
+use DateTimeImmutable;
+use DateTimeInterface;
 use Generator;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
+use stdClass;
 
+use function current;
 use function str_contains;
 
 final class FinderTest extends TestCase
@@ -254,6 +259,18 @@ public static function lastReturnKeyResortKeyDataProvider(): array
         ];
     }
 
+    public function testLastKeepCurrentOriginalData(): void
+    {
+        $data = [new DateTime('now'), new DateTimeImmutable('now'), new stdClass()];
+
+        // get last
+        $last = Finder::last($data, static fn(object $datum): bool => $datum instanceof DateTimeInterface);
+        $this->assertInstanceOf(DateTimeImmutable::class, $last);
+
+        // keep first record not changed from data
+        $this->assertSame(DateTime::class, current($data)::class);
+    }
+
     #[DataProvider('rowsDataProvider')]
     public function testRows(iterable $data, callable $filter, array $expected): void
     {