public function testHtmlTemplate()
 {
     $htmlTemplate = $this->message->getHtmlViewModel();
     $this->assertInstanceOf('Zend\\View\\Model\\ModelInterface', $htmlTemplate);
     $firstName = $htmlTemplate->getVariable('firstName');
     $subject = $htmlTemplate->getVariable('subject');
     $template = $htmlTemplate->getTemplate();
     $this->assertEquals(static::FIRSTNAME, $firstName);
     $this->assertEquals(static::SUBJECT, $subject);
     $this->assertEquals(static::HTMLTEMPLATE, $template);
 }