tests/Feature/Models/SchoolEmailDomainTest.php

@@ -0,0 +1,14 @@
+<?php
+
+use App\Models\School;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+uses(RefreshDatabase::class);
+
+it('has a school', function () {
+    $school = School::factory()->create();
+    $schoolEmailDomain = $school->emailDomains()->create([
+        'domain' => 'example.com',
+    ]);
+    expect($schoolEmailDomain->school->id)->toBe($school->id);
+});