/**
  * Asserts that success message equals to expected message
  *
  * @param CustomerAccountIndex $customerAccountIndex
  * @return void
  */
 public function processAssert(CustomerAccountIndex $customerAccountIndex)
 {
     $successMessage = $customerAccountIndex->getMessages()->getSuccessMessages();
     \PHPUnit_Framework_Assert::assertEquals(self::SUCCESS_MESSAGE, $successMessage, 'Wrong success message is displayed.' . "\nExpected: " . self::SUCCESS_MESSAGE . "\nActual: " . $successMessage);
 }