PHPUnit_Util_XML::convertSelectToTag PHP Method

    public static function convertSelectToTag($selector, $content = TRUE)
    {
        $selector = trim(preg_replace("/\\s+/", " ", $selector));
        // substitute spaces within attribute value
        while (preg_match('/\\[[^\\]]+"[^"]+\\s[^"]+"\\]/', $selector)) {
            $selector = preg_replace('/(\\[[^\\]]+"[^"]+)\\s([^"]+"\\])/', "\$1__SPACE__\$2", $selector);
        }
        if (strstr($selector, ' ')) {
            $elements = explode(' ', $selector);
        } else {
            $elements = array($selector);
        }
        $previousTag = array();
        foreach (array_reverse($elements) as $element) {
            $element = str_replace('__SPACE__', ' ', $element);
            // child selector
            if ($element == '>') {
                $previousTag = array('child' => $previousTag['descendant']);
                continue;
            }
            $tag = array();
            // match element tag
            preg_match("/^([^\\.#\\[]*)/", $element, $eltMatches);
            if (!empty($eltMatches[1])) {
                $tag['tag'] = $eltMatches[1];
            }
            // match attributes (\[[^\]]*\]*), ids (#[^\.#\[]*),
            // and classes (\.[^\.#\[]*))
            preg_match_all("/(\\[[^\\]]*\\]*|#[^\\.#\\[]*|\\.[^\\.#\\[]*)/", $element, $matches);
            if (!empty($matches[1])) {
                $classes = array();
                $attrs = array();
                foreach ($matches[1] as $match) {
                    // id matched
                    if (substr($match, 0, 1) == '#') {
                        $tag['id'] = substr($match, 1);
                    } else {
                        if (substr($match, 0, 1) == '.') {
                            $classes[] = substr($match, 1);
                        } else {
                            if (substr($match, 0, 1) == '[' && substr($match, -1, 1) == ']') {
                                $attribute = substr($match, 1, strlen($match) - 2);
                                $attribute = str_replace('"', '', $attribute);
                                // match single word
                                if (strstr($attribute, '~=')) {
                                    list($key, $value) = explode('~=', $attribute);
                                    $value = "regexp:/.*\\b{$value}\\b.*/";
                                } else {
                                    if (strstr($attribute, '*=')) {
                                        list($key, $value) = explode('*=', $attribute);
                                        $value = "regexp:/.*{$value}.*/";
                                    } else {
                                        list($key, $value) = explode('=', $attribute);
                                    }
                                }
                                $attrs[$key] = $value;
                            }
                        }
                    }
                }
                if ($classes) {
                    $tag['class'] = join(' ', $classes);
                }
                if ($attrs) {
                    $tag['attributes'] = $attrs;
                }
            }
            // tag content
            if (is_string($content)) {
                $tag['content'] = $content;
            }
            // determine previous child/descendants
            if (!empty($previousTag['descendant'])) {
                $tag['descendant'] = $previousTag['descendant'];
            } else {
                if (!empty($previousTag['child'])) {
                    $tag['child'] = $previousTag['child'];
                }
            }
            $previousTag = array('descendant' => $tag);
        }
        return $tag;
    }

 public function testConvertAssertRange()
 {
     $selector = '#foo';
     $content = array('greater_than' => 5, 'less_than' => 10);
     $converted = PHPUnit_Util_XML::convertSelectToTag($selector, $content);
     $tag = array('id' => 'foo');
     $this->assertEquals($tag, $converted);
 }