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<?php |
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namespace WMDE\HamcrestHtml; |
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use Hamcrest\Description; |
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use Hamcrest\DiagnosingMatcher; |
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use Hamcrest\Matcher; |
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class HtmlMatcher extends DiagnosingMatcher |
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{ |
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/** |
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* @link http://www.xmlsoft.org/html/libxml-xmlerror.html#xmlParserErrors |
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* @link https://github.com/Chronic-Dev/libxml2/blob/683f296a905710ff285c28b8644ef3a3d8be9486/include/libxml/xmlerror.h#L257 |
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*/ |
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const XML_UNKNOWN_TAG_ERROR_CODE = 801; |
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const SCRIPT_BODY_REPLACEMENT = 'Contents were removed by HtmlMatcher'; |
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/** |
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* @var Matcher |
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*/ |
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private $elementMatcher; |
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/** |
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* @param Matcher $elementMatcher |
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* |
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* @return HtmlMatcher |
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*/ |
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public static function htmlPiece(Matcher $elementMatcher = null) |
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{ |
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return new static($elementMatcher); |
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} |
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private function __construct(Matcher $elementMatcher = null) |
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{ |
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$this->elementMatcher = $elementMatcher; |
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} |
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public function describeTo(Description $description) |
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{ |
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$description->appendText('valid html piece '); |
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if ($this->elementMatcher) { |
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$description->appendDescriptionOf($this->elementMatcher); |
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} |
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} |
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protected function matchesWithDiagnosticDescription($html, Description $mismatchDescription) |
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{ |
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$internalErrors = libxml_use_internal_errors(true); |
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$document = new \DOMDocument(); |
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$html = $this->stripScriptsContents($html); |
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if (!@$document->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'))) { |
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$mismatchDescription->appendText('there was some parsing error'); |
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return false; |
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} |
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$errors = libxml_get_errors(); |
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libxml_clear_errors(); |
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libxml_use_internal_errors($internalErrors); |
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$result = true; |
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/** @var \LibXMLError $error */ |
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foreach ($errors as $error) { |
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if ($this->isUnknownTagError($error)) { |
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continue; |
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} |
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$mismatchDescription->appendText('there was parsing error: ') |
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->appendText(trim($error->message)) |
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->appendText(' on line ') |
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->appendText($error->line); |
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$result = false; |
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} |
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if ($result === false) { |
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return $result; |
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} |
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$mismatchDescription->appendText('valid html piece '); |
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if ($this->elementMatcher) { |
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$result = $this->elementMatcher->matches($document); |
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$this->elementMatcher->describeMismatch($document, $mismatchDescription); |
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} |
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$mismatchDescription->appendText("\nActual html:\n")->appendText($html); |
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return $result; |
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} |
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private function isUnknownTagError(\LibXMLError $error) |
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{ |
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return $error->code === self::XML_UNKNOWN_TAG_ERROR_CODE; |
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} |
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/** |
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* @param string $html |
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* @return string |
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*/ |
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private function stripScriptsContents($html) |
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{ |
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preg_match_all("#(<script.*>).*</script>#sU", $html, $scripts); |
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foreach ($scripts[0] as $index => $script) { |
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$openTag = $scripts[1][$index]; |
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$replacement = $openTag . self::SCRIPT_BODY_REPLACEMENT . '</script>'; |
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$html = str_replace($script, $replacement, $html); |
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} |
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return $html; |
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} |
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} |
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wmde /
hamcrest-html-matchers
