Create tests for app/Models/SchoolEmailDomain

tests/Feature/app/Models/SchoolEmailDomainTest.php

@@ -0,0 +1,17 @@
+<?php
+
+use App\Models\School;
+use App\Models\SchoolEmailDomain;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    $this->school = School::factory()->create();
+    $this->school->emailDomains()->create(['domain' => 'test.com']);
+});
+
+it('returns its school', function () {
+    expect(SchoolEmailDomain::first()->school->id)->toEqual($this->school->id)
+        ->and(SchoolEmailDomain::first()->school)->toBeInstanceOf(School::class);
+});