$t->is($user->hasCredential($credential), true, '->hasCredential() can takes an array of credential as a parameter');
// [[root, [supplier, [owner, quasiowner]], accounts]]
// root OR (supplier AND (owner OR quasiowner)) OR accounts
$user->clearCredentials();
$credential = array(array('root', array('supplier', array('owner', 'quasiowner')), 'accounts'));
$t->is($user->hasCredential($credential), false, '->hasCredential() can takes an array of credential as a parameter');
$user->addCredential('root');
$t->is($user->hasCredential($credential), true, '->hasCredential() can takes an array of credential as a parameter');
$user->clearCredentials();
$user->addCredential('supplier');
$t->is($user->hasCredential($credential), false, '->hasCredential() can takes an array of credential as a parameter');
$user->addCredential('owner');
$t->is($user->hasCredential($credential), true, '->hasCredential() can takes an array of credential as a parameter');
$user->addCredential('quasiowner');
$t->is($user->hasCredential($credential), true, '->hasCredential() can takes an array of credential as a parameter');
$user->removeCredential('owner');
$t->is($user->hasCredential($credential), true, '->hasCredential() can takes an array of credential as a parameter');
$user->removeCredential('supplier');
$t->is($user->hasCredential($credential), false, '->hasCredential() can takes an array of credential as a parameter');
$user->clearCredentials();
$user->addCredential('admin');
$user->addCredential('user');
$t->is($user->hasCredential('admin'), true);
$t->is($user->hasCredential('user'), true);
$user->addCredentials('superadmin', 'subscriber');
$t->is($user->hasCredential('subscriber'), true);
$t->is($user->hasCredential('superadmin'), true);
// admin and (user or subscriber)
$t->is($user->hasCredential(array(array('admin', array('user', 'subscriber')))), true);
$user->addCredentials(array('superadmin1', 'subscriber1'));
$t->is($user->hasCredential('subscriber1'), true);
