PHPUnit_Util_XML::removeCharacterDataNodes PHP Метод

    public static function removeCharacterDataNodes(DOMNode $node)
    {
        if ($node->hasChildNodes()) {
            for ($i = $node->childNodes->length - 1; $i >= 0; $i--) {
                if (($child = $node->childNodes->item($i)) instanceof DOMCharacterData) {
                    $node->removeChild($child);
                }
            }
        }
    }

 /**
  * Asserts that a hierarchy of DOMElements matches.
  *
  * @param DOMElement $expectedElement
  * @param DOMElement $actualElement
  * @param bool       $checkAttributes
  * @param string     $message
  * @author Mattis Stordalen Flister <*****@*****.**>
  * @since  Method available since Release 3.3.0
  */
 public static function assertEqualXMLStructure(DOMElement $expectedElement, DOMElement $actualElement, $checkAttributes = false, $message = '')
 {
     $expectedElement = clone $expectedElement;
     $actualElement = clone $actualElement;
     self::assertEquals($expectedElement->tagName, $actualElement->tagName, $message);
     if ($checkAttributes) {
         self::assertEquals($expectedElement->attributes->length, $actualElement->attributes->length, sprintf('%s%sNumber of attributes on node "%s" does not match', $message, !empty($message) ? "\n" : '', $expectedElement->tagName));
         for ($i = 0; $i < $expectedElement->attributes->length; $i++) {
             $expectedAttribute = $expectedElement->attributes->item($i);
             $actualAttribute = $actualElement->attributes->getNamedItem($expectedAttribute->name);
             if (!$actualAttribute) {
                 self::fail(sprintf('%s%sCould not find attribute "%s" on node "%s"', $message, !empty($message) ? "\n" : '', $expectedAttribute->name, $expectedElement->tagName));
             }
         }
     }
     PHPUnit_Util_XML::removeCharacterDataNodes($expectedElement);
     PHPUnit_Util_XML::removeCharacterDataNodes($actualElement);
     self::assertEquals($expectedElement->childNodes->length, $actualElement->childNodes->length, sprintf('%s%sNumber of child nodes of "%s" differs', $message, !empty($message) ? "\n" : '', $expectedElement->tagName));
     for ($i = 0; $i < $expectedElement->childNodes->length; $i++) {
         self::assertEqualXMLStructure($expectedElement->childNodes->item($i), $actualElement->childNodes->item($i), $checkAttributes, $message);
     }
 }