public function testToWebFormatWithFilters()
{
$email = new Email();
$email->addFilter("footer", "text/plain", "Here is a plain text footer");
$json = $email->toWebFormat();
$xsmtpapi = json_decode($json['x-smtpapi'], TRUE);
$this->assertEquals('Here is a plain text footer', $xsmtpapi['filters']['footer']['settings']['text/plain']);
}