Fixes tests for middleware registration.

Author: DarkGhostHunter

tests/ServiceProviderTest.php

@@ -10,6 +10,8 @@
 use Laragear\Preload\Http\Middleware\PreloadMiddleware;
 use Laragear\Preload\Preloader;
 use Laragear\Preload\PreloadServiceProvider;
+use function get_class;
+use function method_exists;
 
 class ServiceProviderTest extends TestCase
 {
@@ -51,9 +53,13 @@ protected function usesProductionEnvironment(Application $app): void
      */
     public function test_registers_global_middleware_on_production(): void
     {
-        static::assertTrue(
-            $this->app->make(Kernel::class)->hasMiddleware(PreloadMiddleware::class)
-        );
+        $http = $this->app->make(Kernel::class);
+
+        if (!method_exists($http, 'pushMiddleware')) {
+            $this->markTestSkipped('The ' . get_class($http) . ' does not have a pushMiddleware() method to test.');
+        }
+
+        static::assertTrue($http->hasMiddleware(PreloadMiddleware::class));
     }
 
     protected function setConfigEnableTrue(Application $app): void
@@ -66,9 +72,13 @@ protected function setConfigEnableTrue(Application $app): void
      */
     public function test_registers_global_middleware_when_config_is_true(): void
     {
-        static::assertTrue(
-            app(Kernel::class)->hasMiddleware(PreloadMiddleware::class)
-        );
+        $http = $this->app->make(Kernel::class);
+
+        if (!method_exists($http, 'pushMiddleware')) {
+            $this->markTestSkipped('The ' . get_class($http) . ' does not have a pushMiddleware() method to test.');
+        }
+
+        static::assertTrue($http->hasMiddleware(PreloadMiddleware::class));
     }
 
     public function test_registers_command(): void