Update KernelTestCase.php

Replace Conditional statements  by a simple Null Coalescing Operator

Author: IssamRaouf

Test/KernelTestCase.php

@@ -111,26 +111,9 @@ protected static function getContainer(): ContainerInterface
     protected static function createKernel(array $options = []): KernelInterface
     {
         static::$class ??= static::getKernelClass();
-
-        if (isset($options['environment'])) {
-            $env = $options['environment'];
-        } elseif (isset($_ENV['APP_ENV'])) {
-            $env = $_ENV['APP_ENV'];
-        } elseif (isset($_SERVER['APP_ENV'])) {
-            $env = $_SERVER['APP_ENV'];
-        } else {
-            $env = 'test';
-        }
-
-        if (isset($options['debug'])) {
-            $debug = $options['debug'];
-        } elseif (isset($_ENV['APP_DEBUG'])) {
-            $debug = $_ENV['APP_DEBUG'];
-        } elseif (isset($_SERVER['APP_DEBUG'])) {
-            $debug = $_SERVER['APP_DEBUG'];
-        } else {
-            $debug = true;
-        }
+        
+        $env = $options['environment'] ?? $_ENV['APP_ENV'] ?? $_SERVER['APP_ENV'] ?? 'test';
+        $debug = $options['debug'] ?? $_ENV['APP_DEBUG'] ?? $_SERVER['APP_DEBUG'] ?? true;
 
         return new static::$class($env, $debug);
     }