Laravel 4，单元测试，返回额外数据

bros. Got a strange behaviour. I'm writing tests for my Laravel 4 ClosureTable package.

All tests create new Entity (or Entitites) for further use. For example, one of the first tests: ClosureTableTestCase::testInsertSingle. When I run it, I got this:

Exception: SQLSTATE[HY000]: General error: 1 table pages_closure has no column named 0 (SQL: insert into "pages_closure" ("ancestor", "depth", "descendant", "0", "1", "2") values (?, ?, ?, ?, ?, ?)) (Bindings: array ( 0 => '1', 1 => '0', 2 => '1', 3 => '1', 4 => '1', 5 => '0', ))

And var_dump says me the following:

array(1) {
  [0] =>
  array(6) {
    'ancestor' =>
    string(1) "1"
    [0] =>
    string(1) "1"
    'descendant' =>
    string(1) "1"
    [1] =>
    string(1) "1"
    'depth' =>
    string(1) "0"
    [2] =>
    string(1) "0"
  }
}

However when I create an Entity via web interface, all's fine!

Errors come from DB::select($selectQuery); call when I run tests via terminal. As you can see, I somehow got [0], [1], and [2] extra array keys. However when I create an Entity via web interface, all's fine!

Error is in this method that's run internally:

protected function performInsertNode($descendant, $ancestor)
{
    $table = $this->closure;
    $ak = static::ANCESTOR;
    $dk = static::DESCENDANT;
    $dpk = static::DEPTH;

    DB::transaction(function() use($table, $ak, $dk, $dpk, $descendant, $ancestor){
        $selectQuery = "
            SELECT tbl.{$ak} as {$ak}, {$descendant} as {$dk}, tbl.{$dpk}+1 as {$dpk}
            FROM {$table} AS tbl
            WHERE tbl.{$dk} = {$ancestor}
            UNION ALL
            SELECT {$descendant}, {$descendant}, 0
        ";

        $results = DB::select($selectQuery);
        array_walk($results, function(&$item){ $item = (array)$item; });

        var_dump($results);

        DB::table($table)->insert($results);
    });
}

Do you can point me out a mistake?

Hmm, seems like fetch setting from app/config/database.php is PDO::FETCH_BOTH, if is not that.. you can try to force the settings to get PDO::FETCH_ASSOC before DB::select with:

Config::set('database.fetch', PDO::FETCH_ASSOC);