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<?php
namespace Gt\Dom\Test;

use Gt\Dom\Element;
use Gt\Dom\HTMLDocument;
use Gt\Dom\Test\Helper\Helper;
use PHPUnit\Framework\TestCase;

class NonDocumentTypeChildNodeTest extends TestCase {
	public function testElementSiblings() {
		$document = new HTMLDocument(Helper::HTML_MORE);
		$whoHeading = $document->getElementById("who");
		$plugParagraph = $document->querySelector("p.plug");
		$formsAnchor = $document->querySelector("a[name='forms']");

		$this->assertEquals("p", $whoHeading->nextElementSibling->tagName);
		$this->assertSame($formsAnchor,
			$whoHeading->nextElementSibling->nextElementSibling);
		$this->assertSame($plugParagraph, $whoHeading->previousElementSibling);

		$this->assertInstanceOf(Element::class, $formsAnchor);

		$firstImg = $document->querySelector("img");
		$this->assertEquals("h1", $firstImg->previousElementSibling->tagName);
		$this->assertNull(
			$firstImg->previousElementSibling->previousElementSibling);
		$this->assertNull(
			$document->body->lastElementChild->nextElementSibling);
	}
}