/**
* Tests the flatten() tree manipulator.
*
* @covers ::flatten
*/
public function testFlatten()
{
$this->mockTree();
$tree = $this->defaultMenuTreeManipulators->flatten($this->originalTree);
$this->assertEquals(array(1, 2, 5, 6, 8), array_keys($this->originalTree));
$this->assertEquals(array(1, 2, 5, 6, 8, 3, 4, 7), array_keys($tree));
}
