function testTransactions()
{
$this->assertCount(3, User::all());
\ORM\Model::beginTransaction();
$this->createNewUser();
\ORM\Model::rollback();
$this->assertCount(3, User::all());
\ORM\Model::beginTransaction();
$this->assertTrue(\ORM\Model::inTransaction());
$this->createNewUser();
\ORM\Model::commit();
$this->assertCount(4, User::all());
}