public function testToHtmlWithSubscriber()
{
$this->request->expects($this->any())->method('getParam')->willReturnMap([['id', null, 2], ['store', null, 1], ['subscriber', null, 3]]);
$subscriber = $this->getMock('Magento\\Newsletter\\Model\\Subscriber', [], [], '', false);
$subscriber->expects($this->atLeastOnce())->method('load')->with(3)->willReturnSelf();
$this->subscriberFactory->expects($this->atLeastOnce())->method('create')->willReturn($subscriber);
$this->template->expects($this->atLeastOnce())->method('emulateDesign')->with(1);
$this->template->expects($this->atLeastOnce())->method('revertDesign');
$this->appState->expects($this->atLeastOnce())->method('emulateAreaCode')->with(\Magento\Newsletter\Model\Template::DEFAULT_DESIGN_AREA, [$this->template, 'getProcessedTemplate'], [['subscriber' => $subscriber]])->willReturn('Processed Template');
$this->assertEquals('Processed Template', $this->preview->toHtml());
}
