explicitly close source stream on local storage

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

lib/private/Files/Storage/Local.php

@@ -568,8 +568,11 @@ class Local extends \OC\Files\Storage\Common {
 
 	public function writeStream(string $path, $stream, int $size = null): int {
 		$result = $this->file_put_contents($path, $stream);
+		if (is_resource($stream)) {
+			fclose($stream);
+		}
 		if ($result === false) {
-			throw new GenericFileException("Failed write steam to $path");
+			throw new GenericFileException("Failed write stream to $path");
 		} else {
 			return $result;
 		}

tests/lib/Files/Storage/Storage.php

@@ -658,6 +658,7 @@ abstract class Storage extends \Test\TestCase {
 
 		$storage->writeStream('test.txt', $source);
 		$this->assertTrue($storage->file_exists('test.txt'));
-		$this->assertEquals(file_get_contents($textFile), $storage->file_get_contents('test.txt'));
+		$this->assertStringEqualsFile($textFile, $storage->file_get_contents('test.txt'));
+		$this->assertEquals('resource (closed)', gettype($source));
 	}
 }