test creation of freight order

tests/Fakes/FreightOrder/FakeFreightOrderRepository.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Tests\Fakes\FreightOrder;
+
+use FreightQuote\FreightOrder\FreightOrder;
+
+class FakeFreightOrderRepository
+{
+    public function find(): ?FreightOrder
+    {
+        return new FreightOrder();
+    }
+}

tests/Unit/FreightOrder/UseCases/CreateFreightOrderTest.php

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+<?php
+
+namespace Tests\Unit\FreightOrder\UseCases;
+
+use PHPUnit\Framework\TestCase;
+use FreightQuote\FreightOrder\UseCases\CreateFreightOrder;
+use FreightQuote\FreightOrder\UseCases\CreateFreightOrderRequestDTO;
+use Tests\Fakes\FreightOrder\FakeFreightOrderRepository;
+
+class CreateFreightOrderTest extends TestCase
+{
+    private CreateFreightOrderRequestDTO $dto;
+    private FakeFreightOrderRepository $freightOrderRepo;
+    private CreateFreightOrder $useCase;
+
+    public function setUp(): void
+    {
+        $this->dto = new CreateFreightOrderRequestDTO();
+        $this->freightOrderRepo = new FakeFreightOrderRepository();
+        $this->useCase = new CreateFreightOrder($this->dto);
+    }
+
+    public function test_create_freight_order(): void
+    {
+        $createdFreightOrder = $this->useCase->execute();
+        $this->assertNotNull($this->freightOrderRepo->find(
+            $createdFreightOrder->getId()
+        ));
+    }
+}