Fix rename with same file name

Author: GromNaN

src/GridFS/CollectionWrapper.php

@@ -284,7 +284,7 @@ public function updateFilenameForFilename(string $filename, string $newFilename)
         return $this->filesCollection->updateMany(
             ['filename' => $filename],
             ['$set' => ['filename' => $newFilename]],
-        )->getModifiedCount();
+        )->getMatchedCount();
     }
 
     /**

src/GridFS/StreamWrapper.php

@@ -330,7 +330,10 @@ public function url_stat(string $path, int $flags)
         return $this->stream_stat();
     }
 
-    /** @psalm-return ($mode == 'r' ? array{collectionWrapper: CollectionWrapper, file: object} : array{collectionWrapper: CollectionWrapper, filename: string, options: array}) */
+    /**
+     * @return array{collectionWrapper: CollectionWrapper, file: object}|array{collectionWrapper: CollectionWrapper, filename: string, options: array}
+     * @psalm-return ($mode == 'r' or $mode == 'rb' ? array{collectionWrapper: CollectionWrapper, file: object} : array{collectionWrapper: CollectionWrapper, filename: string, options: array})
+     */
     private function getContext(string $path, string $mode): array
     {
         $context = [];

tests/GridFS/StreamWrapperFunctionalTest.php

@@ -386,6 +386,24 @@ public function testRenameAllRevisions(): void
         rename($path, $path . '.renamed');
     }
 
+    public function testRenameSameFilename(): void
+    {
+        $this->bucket->registerGlobalStreamWrapperAlias('bucket');
+        $path = 'gridfs://bucket/filename';
+
+        $this->assertSame(6, file_put_contents($path, 'foobar'));
+
+        $result = rename($path, $path);
+        $this->assertTrue($result);
+        $this->assertTrue(file_exists($path));
+        $this->assertSame('foobar', file_get_contents($path));
+
+        $path = 'gridfs://bucket/missing';
+        $this->expectException(FileNotFoundException::class);
+        $this->expectExceptionMessage('File with name "gridfs://bucket/missing" not found');
+        rename($path, $path);
+    }
+
     public function testRenamePathMismatch(): void
     {
         $this->expectException(LogicException::class);