public function testIsRootShouldReturnFalseWhenTrackerIsNotInHierarchy()
{
$hierarchy = new Tracker_Hierarchy();
$hierarchy->addRelationship(112, 111);
$this->assertFalse($hierarchy->isRoot(666));
}
public function itIsRootWhenThereAreSeveralParents()
{
$hierarchy = new Tracker_Hierarchy();
$hierarchy->addRelationship(112, 111);
$hierarchy->addRelationship(111, 110);
$this->assertTrue($hierarchy->isRoot(112));
$this->assertFalse($hierarchy->isRoot(111));
$this->assertFalse($hierarchy->isRoot(110));
}
