public function testDeleteTree()
 {
     $this->initTreeWithScope();
     \NestedSetTable10Query::deleteTree(1);
     $expected = ['t8' => [1, 6, 0], 't9' => [2, 3, 1], 't10' => [4, 5, 1]];
     $this->assertEquals($expected, $this->dumpTreeWithScope(2), 'deleteTree() does not delete anything out of the scope');
 }