test create carrier use case

tests/Unit/Carrier/UseCases/CreateCarrierTest.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Tests\Unit\Carrier\UseCases;
+
+use PHPUnit\Framework\TestCase;
+use Tests\Fakes\Carrier\FakeCarrierRepository;
+use FreightQuote\Carrier\UseCases\CreateCarrier;
+use FreightQuote\Carrier\UseCases\CreateCarrierRequest;
+
+class CreateCarrierTest extends TestCase
+{
+    public function test_carrier_is_created(): void
+    {
+        $email = 'joe@shmoe.com';
+        $carrierRepo = new FakeCarrierRepository();
+        $dto = new CreateCarrierRequest(null, $email);
+        $useCase = new CreateCarrier($dto, $carrierRepo);
+        $response = $useCase->execute();
+        $foundCarrier = $carrierRepo->find($response->getId());
+        $this->assertEquals($email, $foundCarrier->getEmail());
+    }
+}