public function testDistinct()
{
$key = time() . mt_rand(1000, 9999);
$res = User::distinct($key, array());
$this->assertArrayHasKey('values', $res);
$this->assertEquals(0, count($res['values']));
$user = User::one();
$user->age = 20;
$user->{$key} = (string) $user->getId();
$user->save();
$res = User::distinct($key, array('age' => 20));
$this->assertEquals(1, count($res['values']));
$res = User::distinct($key, array('age' => 21));
$this->assertEquals(0, count($res['values']));
$user = new User();
$user->age = 21;
$user->save();
$user->{$key} = (string) $user->getId();
$user->save();
$res = User::distinct($key, array());
$this->assertEquals(2, count($res['values']));
$res = User::distinct($key, array('age' => 20));
$this->assertEquals(1, count($res['values']));
}
