public function testAggregate()
{
$time = microtime();
$user = new User(array("time" => $time, "name" => "John", "money" => 100));
$user->save();
$user1 = new User(array("time" => $time, "name" => "John1", "money" => 100));
$user1->save();
$user2 = new User(array("time" => $time, "name" => "John2", "money" => 100));
$user2->save();
$user3 = new User(array("time" => $time, "name" => "John3", "money" => 100));
$user3->save();
$user4 = new User(array("age" => 40, "name" => "John4", "money" => 100));
$user4->save();
$user5 = new User(array("time" => $time, "name" => "John6", "money" => 100));
$user5->save();
$user6 = new User(array("time" => $time, "name" => "John6", "money" => 100));
$user6->save();
$result = User::aggregate(array(array('$match' => array("time" => $time))));
$this->assertCount(6, $result['result']);
}
