impl find method in fake text repo

tests/Fakes/FakeTextRepository.php

@@ -8,10 +8,38 @@ use App\Text\TextRepository;
 
 class FakeTextRepository implements TextRepository
 {
+    /**
+     * @var Text[]
+     */
+    private array $existingTexts = [];
+
     public function create(CreateTextDto $dto): Text
     {
-        return new Text(
+        $id = $this->nextId();
+        $text = new Text(
+            id: $id,
             name: $dto->name,
         );
+        $this->existingTexts[$id] = $text;
+
+        return $text;
+    }
+
+    public function find(int $id): ?Text
+    {
+        $text = $this->existingTexts[$id];
+        if ($text === null) {
+            return null;
+        }
+
+        return new Text(
+            id: $id,
+            name: $text->getName(),
+        );
+    }
+
+    private function nextId(): int
+    {
+        return count($this->existingTexts);
     }
 }