public function testHas()
{
$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);
$collection = new NodeCollection([$parent_one, $parent_two]);
$matches = $collection->has(function (Node $node) use($one) {
return $node === $one;
});
$this->assertCount(1, $matches);
$this->assertSame($parent_one, $matches[0]);
}
