public function testPathBuilding() { $root = new Root(); $root->addDirectory($d1 = new Directory('dir1')); $root->addDirectory($d2 = new Directory('dir2')); $d2->addDirectory($d3 = new Directory('dir3')); $this->assertEquals('/dir1', $d1->path()); $this->assertEquals('/dir2', $d2->path()); $this->assertEquals('/dir2/dir3', $d3->path()); }