test get bid and throws error on invalid id

src/Bid/BidRepository.php

@@ -5,4 +5,5 @@ namespace FreightQuote\Bid;
 interface BidRepository
 {
     public function save(Bid $bid): Bid;
+    public function find(string $id): ?Bid;
 }

src/Bid/UseCases/GetBidForCarrier.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace FreightQuote\Bid\UseCases;
+
+use FreightQuote\Bid\Bid;
+use FreightQuote\Bid\BidRepository;
+use InvalidArgumentException;
+
+class GetBidForCarrier
+{
+    public function __construct(
+        private BidRepository $bidRepo,
+    ) {}
+
+    /**
+     * @throws InvalidArgumentException
+     */
+    public function execute(GetBidForCarrierRequest $dto): Bid
+    {
+        $bid = $this->bidRepo->find($dto->id);
+        if ($bid === null) {
+            throw new InvalidArgumentException('Bid not found!');
+        }
+        return $bid;
+    }
+}

src/Bid/UseCases/GetBidForCarrierRequest.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace FreightQuote\Bid\UseCases;
+
+class GetBidForCarrierRequest
+{
+    public function __construct(
+        public string $id,
+    ) {}
+}

tests/Unit/Bid/UseCases/GetBidForCarrierTest.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Tests\Unit\Bid\UseCases;
+
+use FreightQuote\Bid\UseCases\GetBidForCarrier;
+use FreightQuote\Bid\UseCases\GetBidForCarrierRequest;
+use PHPUnit\Framework\TestCase;
+use InvalidArgumentException;
+use Tests\Fakes\Bid\FakeBidRepository;
+
+class GetBidForCarrierTest extends TestCase
+{
+    public function test_nonexistant_bid_throws_error(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $bidId = '12345abcd';
+        $dto = new GetBidForCarrierRequest($bidId);
+        $bidRepo = new FakeBidRepository();
+        $useCase = new GetBidForCarrier($bidRepo);
+        $foundBid = $useCase->execute($dto);
+    }
+}