Added the first test

phpstan.dist.neon

@@ -4,4 +4,5 @@ parameters:
         - bin/
         - config/
         - public/
-        - src/
+        - src/
+        - tests/

src/Client/Client.php

@@ -4,6 +4,7 @@
 
 namespace App\Client;
 
+use App\Mediator\JsonResponseMediator;
 use Symfony\Component\HttpClient\HttpOptions;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 use Symfony\Contracts\HttpClient\ResponseInterface;
@@ -23,7 +24,7 @@ public function get(string $uri): array
         /** @var ResponseInterface $response */
         $response = $this->client->request('GET', $uri);
 
-        return json_decode($response->getContent(), true);
+        return JsonResponseMediator::content($response);
     }
 
     abstract public function getBaseUri(): string;

src/Mediator/JsonResponseMediator.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mediator;
+
+use Symfony\Contracts\HttpClient\ResponseInterface;
+
+final class JsonResponseMediator
+{
+    /**
+     * @return array<mixed>
+     */
+    public static function content(ResponseInterface $response): array
+    {
+        return json_decode($response->getContent(), true);
+    }
+}

tests/Action/Account/FetchAccountsTest.php

@@ -23,12 +23,25 @@ public function testAction(): void
         $accountRepository->expects($this->once())->method('findAll')->willReturn([$account]);
 
         $eventBus = $this->getMockBuilder(EventDispatcherInterface::class)->disableOriginalConstructor()->getMock();
-        $eventBus->expects($this->once())->method('dispatch')->with(new CreateAccountEvent(['accountId' => 1]));
-        $eventBus->expects($this->once())->method('dispatch')->with(new UpdateAccountEvent($account, ['accountId' => 1]));
+        $eventBus->expects($this->exactly(3))->method('dispatch')->with($this->callback(function ($object) {
+            if ($object instanceof CreateAccountEvent) {
+                return true;
+            }
+            if ($object instanceof UpdateAccountEvent) {
+                return true;
+            }
+
+            return false;
+        }));
 
         $myFxBookRepository = $this->getMockBuilder(MyFxBookRepositoryInterface::class)->disableOriginalConstructor()->getMock();
         $myFxBookRepository->expects($this->once())->method('accounts')->with('123abc#')->willReturn([['accountId' => 1], ['accountId' => 2]]);
 
+        /**
+         * @var AccountRepository $accountRepository
+         * @var EventDispatcherInterface $eventBus
+         * @var MyFxBookRepositoryInterface $myFxBookRepository
+         */
         $fetchAccounts = new FetchAccounts($accountRepository, $eventBus, $myFxBookRepository);
 
         $aggregator = new AggregateRoot();