public function testPrimary()
 {
     $fnf1 = new Kwf_Model_FnF();
     $proxy = new Kwf_Model_Proxy(array('proxyModel' => $fnf1));
     $this->assertEquals('id', $proxy->getPrimaryKey());
     $fnf1 = new Kwf_Model_FnF(array('primaryKey' => 'user_id'));
     $proxy = new Kwf_Model_Proxy(array('proxyModel' => $fnf1));
     $this->assertEquals('user_id', $proxy->getPrimaryKey());
 }