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✏️ Editing: NodeTest.php

<?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <colinodell@gmail.com>
 *
 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
 *  - (c) John MacFarlane
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Tests\Unit\Node;

use PHPUnit\Framework\TestCase;

final class NodeTest extends TestCase
{
    public function testInsertBeforeElementWhichDoesNotHaveAPreviousOne(): void
    {
        $root = new SimpleNode();
        $root->appendChild($targetNode = new SimpleNode());

$newNode = new SimpleNode();
        $targetNode->insertBefore($newNode);

$this->assertNull($newNode->previous());
        $this->assertSame($targetNode, $newNode->next());
        $this->assertSame($newNode, $targetNode->previous());
    }

public function testInsertBeforeElementWhichAlreadyHasPrevious(): void
    {
        $root = new SimpleNode();
        $root->appendChild($firstNode = new SimpleNode());
        $root->appendChild($targetNode = new SimpleNode());

$newNode = new SimpleNode();
        $targetNode->insertBefore($newNode);

$this->assertSame($firstNode, $newNode->previous());
        $this->assertSame($targetNode, $newNode->next());
        $this->assertSame($newNode, $targetNode->previous());
    }

public function testPrependChildToChildlessParent(): void
    {
        $root = new SimpleNode();

$root->prependChild($newNode = new SimpleNode());

$this->assertSame($newNode, $root->firstChild());
        $this->assertSame($root, $newNode->parent());
        $this->assertNull($newNode->previous());
    }

public function testPrependChildToParentWhichAlreadyHasChildren(): void
    {
        $root = new SimpleNode();
        $root->prependChild($existingChild = new SimpleNode());

$this->assertSame($existingChild, $root->firstChild());

$newNode = new SimpleNode();
        $root->prependChild($newNode);

$this->assertCount(2, $root->children());
        $this->assertSame($newNode, $root->firstChild());
        $this->assertSame($root, $newNode->parent());
        $this->assertNull($newNode->previous());
        $this->assertSame($existingChild, $newNode->next());
        $this->assertSame($newNode, $existingChild->previous());
    }

public function testDetachChildren(): void
    {
        $root = new SimpleNode();
        $root->appendChild($child1 = new SimpleNode());
        $root->appendChild($child2 = new SimpleNode());

$root->detachChildren();

$this->assertCount(0, $root->children());
        $this->assertNull($root->firstChild());
        $this->assertNull($root->lastChild());

$this->assertNull($child1->parent());
        $this->assertNull($child2->parent());

$this->assertSame($child2, $child1->next());
        $this->assertSame($child1, $child2->previous());
    }

public function testReplaceChildren(): void
    {
        $root = new SimpleNode();
        $root->appendChild($oldChild = new SimpleNode());

$newChildren = [
            $newChild1 = new SimpleNode(),
            $newChild2 = new SimpleNode(),
        ];

$root->replaceChildren($newChildren);

$this->assertCount(2, $root->children());
        $this->assertSame($newChild1, $root->firstChild());
        $this->assertSame($newChild2, $root->lastChild());
        $this->assertSame($root, $newChild1->parent());
        $this->assertSame($root, $newChild2->parent());
        $this->assertNull($oldChild->parent());
    }

public function testInsertAfterWithParent(): void
    {
        $root = new SimpleNode();
        $root->appendChild($child1 = new SimpleNode());
        $root->appendChild($child2 = new SimpleNode());

$otherRoot = new SimpleNode();
        $otherRoot->appendChild($child3 = new SimpleNode());
        $otherRoot->appendChild($child4 = new SimpleNode());

$child1->insertAfter($child3);

$this->assertCount(3, $root->children());
        $this->assertCount(1, $otherRoot->children());
        $this->assertSame($child1, $root->firstChild());
        $this->assertSame($child2, $root->lastChild());
        $this->assertSame($root, $child2->parent());
    }

public function testInsertAfterWithoutParent(): void
    {
        $node1 = new SimpleNode();
        $node2 = new SimpleNode();

$node1->insertAfter($node2);

$this->assertSame($node2, $node1->next());
        $this->assertSame($node1, $node2->previous());
    }

public function testInsertBeforeWithParent(): void
    {
        $root = new SimpleNode();
        $root->appendChild($child1 = new SimpleNode());
        $root->appendChild($child2 = new SimpleNode());
        $root->appendChild($child3 = new SimpleNode());

$otherRoot = new SimpleNode();
        $otherRoot->appendChild($child4 = new SimpleNode());
        $otherRoot->appendChild($child5 = new SimpleNode());

$child2->insertBefore($child4);

$this->assertCount(4, $root->children());
        $this->assertCount(1, $otherRoot->children());
        $this->assertSame($child1, $root->children()[0]);
        $this->assertSame($child4, $root->children()[1]);
        $this->assertSame($child2, $root->children()[2]);
        $this->assertSame($child3, $root->children()[3]);
        $this->assertSame($root, $child4->parent());
    }

public function testInsertBeforeWithoutParent(): void
    {
        $node1 = new SimpleNode();
        $node2 = new SimpleNode();

$node1->insertBefore($node2);

$this->assertSame($node1, $node2->next());
        $this->assertSame($node2, $node1->previous());
    }

public function testClone(): void
    {
        // Build our intial AST
        $root = new SimpleNode();
        $root->appendChild($child1 = new SimpleNode());
        $root->appendChild($child2 = new SimpleNode());
        $child1->appendChild($grandChild1 = new SimpleNode());
        $child1->appendChild($grandChild2 = new SimpleNode());
        $grandChild2->appendChild($greatGrandChild1 = new SimpleNode());

// Set values on each node to indicate they are originals
        $walker = $root->walker();
        while ($event = $walker->next()) {
            $event->getNode()->value = 'original';
        }

// Clone one of the children
        $cloneOfChild1 = clone $child1;
        // Set values throught the cloned node to indicate they are clones
        $walker = $cloneOfChild1->walker();
        while ($event = $walker->next()) {
            $event->getNode()->value = 'cloned';
        }

// Now check the original to ensure nothing changed there
        $walker = $root->walker();
        while ($event = $walker->next()) {
            $this->assertSame('original', $event->getNode()->value);
        }
    }
}

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