/**
* Assert customer is subscribed to newsletter
*
* @param CustomerInjectable $customer
* @param SubscriberIndex $subscriberIndex
* @return void
*/
public function processAssert(CustomerInjectable $customer, SubscriberIndex $subscriberIndex)
{
$filter = ['email' => $customer->getEmail(), 'firstname' => $customer->getFirstname(), 'lastname' => $customer->getLastname(), 'status' => 'Subscribed'];
$subscriberIndex->open();
\PHPUnit_Framework_Assert::assertTrue($subscriberIndex->getSubscriberGrid()->isRowVisible($filter), 'Customer with email \'' . $customer->getEmail() . '\' is absent in Newsletter Subscribers grid.');
}
