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<?php declare(strict_types=1);
/*
* This file is part of sebastian/comparator.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Comparator;
use function sprintf;
use function strtolower;
use DOMDocument;
use DOMNode;
/**
* Compares DOMNode instances for equality.
*/
class DOMNodeComparator extends ObjectComparator
{
/**
* Returns whether the comparator can compare two values.
*
* @param mixed $expected The first value to compare
* @param mixed $actual The second value to compare
*
* @return bool
*/
public function accepts($expected, $actual)
{
return $expected instanceof DOMNode && $actual instanceof DOMNode;
}
/**
* Asserts that two values are equal.
*
* @param mixed $expected First value to compare
* @param mixed $actual Second value to compare
* @param float $delta Allowed numerical distance between two values to consider them equal
* @param bool $canonicalize Arrays are sorted before comparison when set to true
* @param bool $ignoreCase Case is ignored when set to true
* @param array $processed List of already processed elements (used to prevent infinite recursion)
*
* @throws ComparisonFailure
*/
public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = false, $ignoreCase = false, array &$processed = [])/*: void*/
{
$expectedAsString = $this->nodeToText($expected, true, $ignoreCase);
$actualAsString = $this->nodeToText($actual, true, $ignoreCase);
if ($expectedAsString !== $actualAsString) {
$type = $expected instanceof DOMDocument ? 'documents' : 'nodes';
throw new ComparisonFailure(
$expected,
$actual,
$expectedAsString,
$actualAsString,
false,
sprintf("Failed asserting that two DOM %s are equal.\n", $type)
);
}
}
/**
* Returns the normalized, whitespace-cleaned, and indented textual
* representation of a DOMNode.
*/
private function nodeToText(DOMNode $node, bool $canonicalize, bool $ignoreCase): string
{
if ($canonicalize) {
$document = new DOMDocument;
@$document->loadXML($node->C14N());
$node = $document;
}
$document = $node instanceof DOMDocument ? $node : $node->ownerDocument;
$document->formatOutput = true;
$document->normalizeDocument();
$text = $node instanceof DOMDocument ? $node->saveXML() : $document->saveXML($node);
return $ignoreCase ? strtolower($text) : $text;
}
}