test set elements

backend/tests/Fakes/FakeSetRepository.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Tests\Fakes;
+
+use App\Set\CreateSetDto;
+use App\Set\Set as DomainSet;
+use App\Set\SetRepository;
+
+class FakeSetRepository implements SetRepository
+{
+    /**
+     * @var DomainSet[]
+     */
+    private array $setsById = [];
+
+    public function create(CreateSetDto $dto): DomainSet
+    {
+        $id = count($this->setsById) + 1;
+        $set = new DomainSet(
+            id: $id,
+            name: $dto->name,
+        );
+        $this->setsById[$id] = $set;
+
+        return $set;
+    }
+
+    public function find(int $id): ?DomainSet
+    {
+        if (! isset($this->setsById[$id])) {
+            return null;
+        }
+
+        return $this->cloneSet($this->setsById[$id]);
+    }
+
+    /**
+     * @return DomainSet[]
+     */
+    public function getAll(): array
+    {
+        $sets = [];
+        foreach ($this->setsById as $set) {
+            $sets[] = $this->cloneSet($set);
+        }
+
+        return $sets;
+    }
+
+    private function cloneSet(DomainSet $set): DomainSet
+    {
+        return new DomainSet(
+            id: $set->getId(),
+            name: $set->getName(),
+        );
+    }
+}