some refactoring for tests and adding some tables

app/Http/Requests/UpdateAircraftClassRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+use App\Models\AircraftClass;
+
+class UpdateAircraftClassRequest extends FormRequest
+{
+
+    /**
+     * Determine if the user is authorized to make this request.
+     *
+     * @return bool
+     */
+    public function authorize()
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return AircraftClass::$rules;
+    }
+}