public function testSlice()
{
$root = new RootNode();
$nodes = [];
for ($i = 0; $i < 5; $i++) {
$node = $this->createNode();
$root->append($node);
$nodes[] = $node;
}
$collection = new NodeCollection($nodes, FALSE);
$slice = $collection->slice(4);
$this->assertCount(1, $slice);
$slice = $collection->slice(2, 4);
$this->assertCount(2, $slice);
$slice = $collection->slice(1, -1);
$this->assertCount(3, $slice);
$slice = $collection->slice(1, -2);
$this->assertCount(2, $slice);
$slice = $collection->slice(-2, -1);
$this->assertCount(1, $slice);
$slice = $collection->slice(-3, -1);
$this->assertCount(2, $slice);
}
