Made test properties to be private instead of protected

module/Core/src/Options/AppOptions.php

@@ -12,13 +12,13 @@ class AppOptions extends AbstractOptions
     use StringUtilsTrait;
 
     /** @var string */
-    protected $name = '';
+    private $name = '';
     /** @var string */
-    protected $version = '1.0';
+    private $version = '1.0';
     /** @var string */
-    protected $secretKey = '';
+    private $secretKey = '';
     /** @var string|null */
-    protected $disableTrackParam;
+    private $disableTrackParam;
 
     /**
      * AppOptions constructor.

module/Core/test/Action/PixelActionTest.php

@@ -19,11 +19,11 @@ use Zend\Diactoros\ServerRequestFactory;
 class PixelActionTest extends TestCase
 {
     /** @var RedirectAction */
-    protected $action;
+    private $action;
     /** @var ObjectProphecy */
-    protected $urlShortener;
+    private $urlShortener;
     /** @var ObjectProphecy */
-    protected $visitTracker;
+    private $visitTracker;
 
     public function setUp()
     {

module/Core/test/Action/PreviewActionTest.php

@@ -24,7 +24,7 @@ use function filesize;
 class PreviewActionTest extends TestCase
 {
     /** @var PreviewAction */
-    protected $action;
+    private $action;
     /** @var ObjectProphecy */
     private $previewGenerator;
     /** @var ObjectProphecy */

module/Core/test/Action/QrCodeActionTest.php

@@ -21,9 +21,9 @@ use Zend\Expressive\Router\RouterInterface;
 class QrCodeActionTest extends TestCase
 {
     /** @var QrCodeAction */
-    protected $action;
+    private $action;
     /** @var ObjectProphecy */
-    protected $urlShortener;
+    private $urlShortener;
 
     public function setUp()
     {

module/Core/test/ConfigProviderTest.php

@@ -9,7 +9,7 @@ use Shlinkio\Shlink\Core\ConfigProvider;
 class ConfigProviderTest extends TestCase
 {
     /** @var ConfigProvider */
-    protected $configProvider;
+    private $configProvider;
 
     public function setUp()
     {

module/Core/test/Middleware/QrCodeCacheMiddlewareTest.php

@@ -16,9 +16,9 @@ use Zend\Diactoros\Uri;
 class QrCodeCacheMiddlewareTest extends TestCase
 {
     /** @var QrCodeCacheMiddleware */
-    protected $middleware;
+    private $middleware;
     /** @var Cache */
-    protected $cache;
+    private $cache;
 
     public function setUp()
     {

module/Core/test/Service/ShortUrlServiceTest.php

@@ -20,9 +20,9 @@ use function count;
 class ShortUrlServiceTest extends TestCase
 {
     /** @var ShortUrlService */
-    protected $service;
+    private $service;
     /** @var ObjectProphecy|EntityManagerInterface */
-    protected $em;
+    private $em;
 
     public function setUp()
     {

module/Core/test/Service/UrlShortenerTest.php

@@ -24,13 +24,13 @@ use Zend\Diactoros\Uri;
 class UrlShortenerTest extends TestCase
 {
     /** @var UrlShortener */
-    protected $urlShortener;
+    private $urlShortener;
     /** @var ObjectProphecy */
-    protected $em;
+    private $em;
     /** @var ObjectProphecy */
-    protected $httpClient;
+    private $httpClient;
     /** @var ObjectProphecy */
-    protected $slugger;
+    private $slugger;
 
     public function setUp()
     {

module/Core/test/Service/VisitServiceTest.php

@@ -21,9 +21,9 @@ use function func_get_args;
 class VisitServiceTest extends TestCase
 {
     /** @var VisitService */
-    protected $visitService;
+    private $visitService;
     /** @var ObjectProphecy */
-    protected $em;
+    private $em;
 
     public function setUp()
     {

module/Core/test/Service/VisitsTrackerTest.php

@@ -17,9 +17,9 @@ use Shlinkio\Shlink\Core\Service\VisitsTracker;
 class VisitsTrackerTest extends TestCase
 {
     /** @var VisitsTracker */
-    protected $visitsTracker;
+    private $visitsTracker;
     /** @var ObjectProphecy */
-    protected $em;
+    private $em;
 
     public function setUp()
     {