fix tests

app/Services/Invoices/InvoiceGradeService.php

@@ -4,13 +4,12 @@ namespace App\Services\Invoices;
 
 class InvoiceGradeService
 {
-    public function __construct(private int $gradeFee)
-    {
-    }
+    public function __construct(private int $gradeFee) {}
 
     public function isKindergarten(string $grade): bool
     {
         $g = strtolower(trim($grade));
+
         return in_array($g, ['KG', 'kg', 'k', 'kindergarten', 'k-g', 'k.g', 'k g'], true);
     }
 
@@ -29,6 +28,7 @@ class InvoiceGradeService
     public function gradeLevelInt(string $grade): int
     {
         $gl = $this->getGradeLevel($grade);
+
         return (int) ($gl['level'] ?? 0);
     }
 
@@ -39,10 +39,11 @@ class InvoiceGradeService
             if ($num === 13) {
                 return ['level' => 1, 'suffix' => '', 'classId' => 13];
             }
+
             return ['level' => $num, 'suffix' => '', 'classId' => null];
         }
 
-        if (!is_string($grade)) {
+        if (! is_string($grade)) {
             return ['level' => 999, 'suffix' => '', 'classId' => null];
         }
 
@@ -63,6 +64,7 @@ class InvoiceGradeService
 
         if (preg_match('/^Y(?:OUTH)?(?:\s*(\d+))?$/', $g, $m)) {
             $n = isset($m[1]) && $m[1] !== '' ? max(1, (int) $m[1]) : 1;
+
             return [
                 'level' => $this->gradeFee + $n,
                 'suffix' => '',