makeEmpty/make silently loses property values for PHP 8.4+ hooked properties

Stub.php の523〜526行付近から始めます。ここでは Stub::bindParameters() が PHPUnit のモックオブジェクトに対して親のリフレクションへ切り替えています。PHP 8.4+ の hooked property で問題を再現してください。PHPUnit 13 が '$prop::get' を通じて hooked properties をどのように公開しているかを確認し、hooked properties をどのように検出すべきかを判断してください。makeEmpty() と make() に渡された値が、プロパティの型が final class である場合を含め、引き続き読み取り可能であれば完了です。

Environment

• PHP: 8.5.6 (reproduces on PHP 8.4+, the version that introduced property hooks)
• codeception/stub: 4.3.0
• phpunit/phpunit: 13.0.6

Problem

When mocking a class that has PHP 8.4 property hooks, values passed to makeEmpty() / make() for hooked properties are silently lost. Depending on the property type, this either returns null / an auto-generated stub, or throws a RuntimeException if the property type is a final class.

A real-world trigger: symfony/http-foundation 8.1 added set hooks with deprecation warnings to all major public bags on Request ($request, $query, $attributes, etc.), causing all tests that mock Request with those properties to break.

Minimal reproduction

class Foo
{
    public string $bar {
        set { $this->bar = $value; }
    }
}

// Value is silently lost
$mock = $this->makeEmpty(Foo::class, ['bar' => 'baz']);
var_dump($mock->bar); // expected: string(3) baz, actual: auto-stub or error

With a final-typed property (e.g. InputBag):

// Throws RuntimeException:
// Return value for MockObject_Request::::get() cannot be generated:
// Class "Symfony\Component\HttpFoundation\InputBag" is declared "final"
$mock = $this->makeEmpty(Request::class, ['request' => new InputBag(['foo' => 'bar'])]);
$mock->request->get('foo'); // boom

Root cause

Stub::bindParameters() deliberately switches to getParentClass() for PHPUnit mock objects (line 523–526 in Stub.php), then calls ReflectionProperty::setValue() on the parent's reflection:

if ($mock instanceof PHPUnitMockObject) {
    $reflectionClass = $reflectionClass->getParentClass(); // Request::class
}
// ...
$reflectionProperty->setValue($mock, $value); // writes to parent's backing store

In PHP 8.4, a class that redeclares a property with hooks (as PHPUnit's mock generator does when the source class has hooks — see phpunit#6549) gets its own separate backing store. The write goes into the parent's backing store; the read goes through the mock's generated get hook, which reads from the mock's backing store — they never meet.

Possible fix direction

For properties that have hooks in the source class, bindParameters() should configure the mock via PHPUnit's mock API instead of ReflectionProperty::setValue():

// PHPUnit 13 exposes hooked properties as mockable methods named '$prop::get'
$mock->method('$bar::get')->willReturn('baz');

This requires detecting hooked properties (via ReflectionProperty::hasHooks() / getHook(), available since PHP 8.4) and branching accordingly.