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

tests/Unit/Models/SaveFileTest.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace Tests\Unit\Models;
+
+use App\Features\Games\Models\Game;
+use App\Features\Settings\Models\SaveFile;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use PHPUnit\Framework\Attributes\Test;
+use Tests\TestCase;
+
+class SaveFileTest extends TestCase
+{
+    use RefreshDatabase;
+
+    #[Test]
+    public function it_belongs_to_a_user(): void
+    {
+        $saveFile = SaveFile::factory()->create();
+
+        $this->assertInstanceOf(User::class, $saveFile->user);
+    }
+
+    #[Test]
+    public function it_belongs_to_a_game(): void
+    {
+        $saveFile = SaveFile::factory()->create();
+
+        $this->assertInstanceOf(Game::class, $saveFile->game);
+    }
+
+    #[Test]
+    public function it_casts_last_synced_at_to_datetime(): void
+    {
+        $saveFile = SaveFile::factory()->create([
+            'last_synced_at' => '2024-01-15 10:30:00',
+        ]);
+
+        $this->assertInstanceOf(\Illuminate\Support\Carbon::class, $saveFile->last_synced_at);
+    }
+
+    #[Test]
+    public function it_has_fillable_attributes(): void
+    {
+        $saveFile = new SaveFile();
+
+        $this->assertEquals([
+            'user_id',
+            'game_id',
+            'file_path',
+            'file_name',
+            'file_size',
+            'last_synced_at',
+        ], $saveFile->getFillable());
+    }
+}