public function test_isEmpty2()
 {
     $nnode = new ColorBbcodeNode();
     $this->assertTrue($nnode->isEmpty());
 }
 /**
  * Parses the text inside a new color bbcode node.
  * 
  * @param ColorBbcodeNode $node
  * @return ColorBbcodeNode
  */
 protected function parseColorBbcodeNode(ColorBbcodeNode $node)
 {
     $first_rbracket_pos = strpos($this->_string, ']', $this->_pos - 1);
     $equal_pos = strpos($this->_string, '=', $this->_pos - 1);
     if ($first_rbracket_pos !== false && $equal_pos !== false && $equal_pos < $first_rbracket_pos) {
         $colorval = substr($this->_string, $equal_pos + 1, $first_rbracket_pos - $equal_pos - 1);
         if (preg_match('%^#?[0-9A-Fa-f]{6}$%', $colorval)) {
             // hexa color
             if (strpos($colorval, '#') === false) {
                 $colorval = '#' . $colorval;
             }
         }
         $node->setColor($colorval);
         $this->_pos = $first_rbracket_pos + 1;
         $this->parseContent();
     }
     // else treat as text
     return $node;
 }