Fixed UploadedFile::isValid() does not works in phpunit. (#3398)

* Fixed `UploadedFile::isValid()` does not works in phpunit.

* Update CHANGELOG-2.1.md

Author: limingxinleo

src/Client.php

@@ -18,12 +18,12 @@
 use Hyperf\HttpMessage\Server\Request as Psr7Request;
 use Hyperf\HttpMessage\Server\Response as Psr7Response;
 use Hyperf\HttpMessage\Stream\SwooleStream;
-use Hyperf\HttpMessage\Upload\UploadedFile;
 use Hyperf\HttpMessage\Uri\Uri;
 use Hyperf\HttpServer\MiddlewareManager;
 use Hyperf\HttpServer\ResponseEmitter;
 use Hyperf\HttpServer\Router\Dispatched;
 use Hyperf\HttpServer\Server;
+use Hyperf\Testing\HttpMessage\Upload\UploadedFile;
 use Hyperf\Utils\Arr;
 use Hyperf\Utils\Context;
 use Hyperf\Utils\Filesystem\Filesystem;

src/HttpMessage/Upload/UploadedFile.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * This file is part of Hyperf.
+ *
+ * @link     https://www.hyperf.io
+ * @document https://hyperf.wiki
+ * @contact  [email protected]
+ * @license  https://github.com/hyperf/hyperf/blob/master/LICENSE
+ */
+namespace Hyperf\Testing\HttpMessage\Upload;
+
+class UploadedFile extends \Hyperf\HttpMessage\Upload\UploadedFile
+{
+    public function isValid(): bool
+    {
+        return true;
+    }
+}