public function testDeleteRows()
 {
     $model = new Kwf_Model_FnF();
     $model->setData(array(array('id' => 1, 'value' => 'foo'), array('id' => 2, 'value' => 'bar')));
     $model->deleteRows($model->select()->whereEquals('value', 'foo'));
     $this->assertEquals(count($model->fetchAll()), 1);
     $this->assertEquals(count($model->find(1)), 0);
     $this->assertEquals($model->find(2)->current()->value, 'bar');
     $model->deleteRows($model->select());
     $this->assertEquals(count($model->fetchAll()), 0);
 }