WMDE\HamcrestHtml\ChildElementMatcher

Complexity

Total Complexity

10

Size/Duplication

Total Lines	56
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Test Coverage

Coverage

75%

Importance

Changes

0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	havingChild()	0	3	1
A	__construct()	0	4	1
A	describeTo()	0	6	2
B	matchesSafelyWithDiagnosticDescription()	0	25	6

<?php

namespace WMDE\HamcrestHtml;

use Hamcrest\Description;
use Hamcrest\Matcher;
use Hamcrest\TypeSafeDiagnosingMatcher;

class ChildElementMatcher extends TypeSafeDiagnosingMatcher {

	/**
	 * @var Matcher|null
	 */
	private $matcher;

	public static function havingChild( Matcher $elementMatcher = null ) {
		return new static( $elementMatcher );
	}

	public function __construct( Matcher $matcher = null ) {
		parent::__construct( \DOMNode::class );
		$this->matcher = $matcher;
	}

	public function describeTo( Description $description ) {
		$description->appendText( 'having child ' );
		if ( $this->matcher ) {
			$description->appendDescriptionOf( $this->matcher );
		}
	}

	/**
	 * @param \DOMDocument|\DOMNode $item
	 * @param Description $mismatchDescription
	 *
	 * @return bool
	 */
	protected function matchesSafelyWithDiagnosticDescription( $item, Description $mismatchDescription ) {
		if ( $item instanceof \DOMDocument ) {
			$directChildren = $item->documentElement->childNodes->item( 0 )->childNodes;
		} else {
			$directChildren = $item->childNodes;
		}

		if ( $directChildren->length === 0 ) {
			$mismatchDescription->appendText( 'having no children' );
			return false;
		}

		if ( !$this->matcher ) {
			return $directChildren->length > 0;
		}

		foreach ( new XmlNodeRecursiveIterator( $directChildren ) as $child ) {
			if ( $this->matcher->matches( $child ) ) {
				return true;
			}
		}

		$mismatchDescription->appendText( 'having no children ' )->appendDescriptionOf( $this->matcher );
		return false;
	}

}