Make sure we have no media for the empty response test

tests/Feature/MicropubMediaTest.php

@@ -3,6 +3,7 @@
 namespace Tests\Feature;
 
 use App\Jobs\ProcessMedia;
+use App\Models\Media;
 use Illuminate\Foundation\Testing\DatabaseTransactions;
 use Illuminate\Http\UploadedFile;
 use Illuminate\Support\Facades\Queue;
@@ -18,6 +19,11 @@ class MicropubMediaTest extends TestCase
     /** @test */
     public function emptyResponseForLastUploadWhenNoneFound()
     {
+        // Make sure there’s no media
+        Media::all()->each(function ($media) {
+            $media->delete();
+        });
+
         $response = $this->get(
             '/api/media?q=last',
             ['HTTP_Authorization' => 'Bearer ' . $this->getToken()]