refactor: Fix some types and unused variables

classes/PlaylistArchiveStream.php

@@ -156,7 +156,7 @@ class PlaylistArchiveStream extends TarArchive implements StreamInterface
      *
      * @param string $key string $key Specific metadata to retrieve.
      *
-     * @return null
+     * @return array|mixed|null
      */
     public function getMetadata($key = null)
     {

classes/Video.php

@@ -22,6 +22,8 @@ use Symfony\Component\Process\Process;
  * @property-read string      $ext           File extension
  * @property-read string      $extractor_key youtube-dl extractor class used
  * @property-read array       $entries       List of videos (if the object contains information about a playlist)
+ * @property-read array       $rtmp_conn
+ * @property-read string|null $_type         Object type (usually "playlist" or null)
  */
 class Video
 {

controllers/FrontController.php

@@ -442,7 +442,6 @@ class FrontController
         if ($request->isGet()) {
             $response = $response->withBody(new Stream($stream));
         }
-        $webpageUrl = $request->getQueryParam('url');
 
         return $response->withHeader(
             'Content-Disposition',

tests/ConfigTest.php

@@ -36,8 +36,9 @@ class ConfigTest extends BaseTest
      */
     public function testGetInstance()
     {
-        $this->assertEquals($this->config->convert, false);
-        $this->assertConfig($this->config);
+        $config = Config::getInstance();
+        $this->assertEquals($config->convert, false);
+        $this->assertConfig($config);
     }
 
     /**
@@ -67,7 +68,8 @@ class ConfigTest extends BaseTest
      */
     public function testSetFile()
     {
-        $this->assertNull(Config::setFile($this->getConfigFile()));
+        Config::setFile($this->getConfigFile());
+        $this->assertConfig($this->config);
     }
 
     /**

tests/FrontControllerTest.php

@@ -48,13 +48,6 @@ class FrontControllerTest extends BaseTest
      */
     private $controller;
 
-    /**
-     * Config class instance.
-     *
-     * @var Config
-     */
-    private $config;
-
     /**
      * Prepare tests.
      */