Nestable\Tests\Services\NestableServiceTest::testIsValidForArray PHP Метод

    public function testIsValidForArray()
    {
        $nestable = new \Nestable\Services\NestableService();
        $nested = $nestable->make($this->categories);
        $this->assertTrue($nested->isValidForArray());
        $nested = $nested->isValidForArray(true);
        $iteratorArray = new RecursiveArrayIterator($nested);
        $iterator = new RecursiveIteratorIterator($iteratorArray);
        $this->assertTrue($iterator->valid());
        $this->assertFalse($nested == $this->categories);
        $parent_id = $this->_get_random_parent_id($iteratorArray);
        if ($parent_id) {
            $result = $this->_helper_recursive($nested, $parent_id);
            $this->assertGreaterThan(0, $result);
        }
    }