fix(models): correct UserSetting import namespace and add test coverage

tests/Unit/Models/RomFileTest.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Tests\Unit\Models;
+
+use App\Features\Games\Models\Game;
+use App\Features\Games\Models\RomFile;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use PHPUnit\Framework\Attributes\Test;
+use Tests\TestCase;
+
+class RomFileTest extends TestCase
+{
+    use RefreshDatabase;
+
+    #[Test]
+    public function it_belongs_to_a_game(): void
+    {
+        $romFile = RomFile::factory()->create();
+
+        $this->assertInstanceOf(Game::class, $romFile->game);
+    }
+
+    #[Test]
+    public function it_has_fillable_attributes(): void
+    {
+        $romFile = new RomFile();
+
+        $this->assertEquals([
+            'game_id',
+            'file_path',
+            'file_name',
+            'file_size',
+            'file_hash',
+            'region',
+            'language',
+        ], $romFile->getFillable());
+    }
+}