/**
  * @covers BackBee\NestedNode\AbstractNestedNode::isRoot
  */
 public function testIsRoot()
 {
     $this->assertTrue($this->mock->isRoot());
     $this->mock->setLeftnode(2);
     $this->assertFalse($this->mock->isRoot());
     $this->mock->setParent($this->mock);
     $this->assertFalse($this->mock->isRoot());
 }