/**
* @magentoDataFixture Magento/Newsletter/_files/subscribers.php
*/
public function testShowCustomerInfo()
{
$this->_collectionModel->showCustomerInfo()->load();
/** @var \Magento\Newsletter\Model\Subscriber[] $subscribers */
$subscribers = $this->_collectionModel->getItems();
$this->assertCount(2, $subscribers);
$subscriber = array_shift($subscribers);
$this->assertEquals('Firstname', $subscriber->getCustomerFirstname(), $subscriber->getSubscriberEmail());
$this->assertEquals('Lastname', $subscriber->getCustomerLastname(), $subscriber->getSubscriberEmail());
$subscriber = array_shift($subscribers);
$this->assertNull($subscriber->getCustomerFirstname(), $subscriber->getSubscriberEmail());
$this->assertNull($subscriber->getCustomerLastname(), $subscriber->getSubscriberEmail());
}