Recursive ArrayAccess/Collection serialization

tests/Helpers/CollectionWrapper.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace Tests\Helpers;
+
+use Illuminate\Support\Collection;
+use YouCanShop\Cereal\Cereal;
+use YouCanShop\Cereal\Contracts\Serializable;
+
+class CollectionWrapper implements Serializable
+{
+    use Cereal;
+
+    /** @var Collection<array-key, Something> */
+    public Collection $things;
+
+    /**
+     * @param Collection<array-key, Something> $things
+     */
+    public function __construct(Collection $things)
+    {
+        $this->things = $things;
+    }
+
+    public function serializes(): array
+    {
+        return ['things'];
+    }
+}

tests/Helpers/Something.php

@@ -5,6 +5,7 @@
 class Something
 {
     private string $id;
+    private bool $processed = false;
 
     public function __construct(string $id)
     {
@@ -15,4 +16,16 @@ public function getId(): string
     {
         return $this->id;
     }
+
+    public function isProcessed(): bool
+    {
+        return $this->processed;
+    }
+
+    public function setProcessed(bool $processed): Something
+    {
+        $this->processed = $processed;
+
+        return $this;
+    }
 }

tests/Helpers/SomethingHandler.php

@@ -37,6 +37,6 @@ public function serialize(Serializable $serializable, $value): string
      */
     public function deserialize(Serializable $serializable, $value): Something
     {
-        return $this->table[$value];
+        return $this->table[$value]->setProcessed(true);
     }
 }

tests/Unit/Laravel/SerializerTest.php

@@ -4,9 +4,13 @@
 
 use Illuminate\Database\Capsule\Manager as Capsule;
 use Illuminate\Database\Eloquent\Model;
+use Tests\Helpers\CollectionWrapper;
+use Tests\Helpers\Something;
+use Tests\Helpers\SomethingHandler;
 use YouCanShop\Cereal\Contracts\Serializable;
 use YouCanShop\Cereal\Laravel\Cereal;
 use YouCanShop\Cereal\Laravel\SerializationHandlerFactory as LaravelSerializationHandlerFactory;
+use YouCanShop\Cereal\SerializationHandlerFactory;
 use YouCanShop\Cereal\SerializationHandlerFactory as BaseSerializationHandlerFactory;
 
 it('serializes eloquent models', function () {
@@ -81,3 +85,27 @@ public function serializes(): array
     expect($deserializedEmail->user->id)->toBe($user->id);
     expect($deserializedEmail->user->full_name)->toBe($user->full_name);
 });
+
+it('serializes collections', function () {
+    $table = [
+        'one' => new Something('one'),
+        'two' => new Something('two'),
+    ];
+
+    SerializationHandlerFactory::getInstance()
+        ->addHandler(
+            Something::class,
+            new SomethingHandler($table)
+        );
+
+    $wrapper = new CollectionWrapper(collect($table));
+
+    $s = serialize($wrapper);
+
+    /** @var CollectionWrapper $u */
+    $u = unserialize($s);
+
+    expect($u->things)
+        ->every(fn(Something $t) => $t->isProcessed())
+        ->toBeTrue();
+});