public function testFlagHelper()
{
$b = new Book();
$ret = $b->create(['title' => 'Test Book']);
$this->assertResultSuccess($ret);
$schema = $b->getSchema();
ok($schema);
$cA = $schema->getColumn('is_hot');
$cB = $schema->getColumn('is_selled');
ok($cA);
ok($cB);
$ret = $b->update(['is_hot' => true]);
$this->assertResultSuccess($ret);
$ret = $b->update(['is_selled' => true]);
$this->assertResultSuccess($ret);
$ret = $b->delete();
$this->assertResultSuccess($ret);
}