public function testClosest()
{
$root = new RootNode();
$parent_one = $this->createParentNode();
$one = $this->createNode();
$parent_one->append($one);
$root->append($parent_one);
$parent_two = $this->createParentNode();
$two = $this->createNode();
$parent_two->append($two);
$root->append($parent_two);
$collection = new NodeCollection([$one, $two]);
$matches = $collection->closest(function (Node $node) {
return $node instanceof ParentNode;
});
$this->assertCount(2, $matches);
$this->assertSame($parent_one, $matches[0]);
$this->assertSame($parent_two, $matches[1]);
}
