added test subscriber relation manager

tests/Feature/EmailListResource/RelationManagerTest.php

@@ -0,0 +1,25 @@
+<?php
+
+use App\Filament\Admin\Resources\EmailListResource\Pages\EditEmailList;
+use App\Filament\Admin\Resources\EmailListResource\RelationManagers\SubscribersRelationManager;
+use App\Models\EmailList;
+use App\Models\Subscriber;
+use App\Models\Tag;
+
+use function Pest\Livewire\livewire;
+
+beforeEach(function () {
+    asUser();
+});
+
+it('can list email lists subscribers', function () {
+    $emailList = EmailList::factory()->has(Subscriber::factory()->count(3)->has(Tag::factory()->count(1)))->create();
+
+    livewire(SubscribersRelationManager::class, [
+        'ownerRecord' => $emailList,
+        'pageClass' => EditEmailList::class,
+    ])
+        ->loadTable()
+        ->assertCanSeeTableRecords($emailList->subscribers)
+        ->assertCountTableRecords($emailList->subscribers()->count());
+});