MarshallingSessionHandler example

protected MockObject&\SessionHandlerInterface $handler;
    protected MockObject&MarshallerInterface $marshaller;

    protected function setUp(): void
    {
        $this->marshaller = $this->createMock(MarshallerInterface::class);
        $this->handler = $this->createMock(AbstractSessionHandler::class);
    }

    public function testOpen()
    {
        $marshallingSessionHandler = new MarshallingSessionHandler($this->handler, $this->marshaller);

        $this->handler->expects($this->once())->method('open')
            ->with('path', 'name')->willReturn(true);

        $marshallingSessionHandler->open('path', 'name');
    }

    public function testClose()
    {
        $marshallingSessionHandler = new MarshallingSessionHandler($this->handler, $this->marshaller);