cakephp测试控制器：数据库模拟不返回任何东西

Question

我是CakePHP和PHPUnit的新手，我想测试其中一个控制器。到目前为止，我有这个方法我想测试：

public function getAlternatives($id = null){ 
    // ID parameter given or is NaN? 
    if (!$id || !is_numeric($id)) { 
     throw new BadRequestException(); 
    } 

    // Error if object not found 
    if (!$this->Designitem->exists($id)) { 
     throw new NotFoundException(); 
    } 

    $alternatives = $this->Designitem->getItemsWithFunritures($id); 

    $this->set(array(
     'alternatives' => $alternatives, 
     '_serialize' => array('alternatives'), 
     '_jsonp' => true)); 
} 

现在我想测试getItemsWithFurnitures是不是叫我的模型Designitem。为了验证这一点，我实现了这个测试：

public function testGetAlternativesWithValidID() { 
    $id = 1; 
    $url = array('controller' => 'Designitems', 'action' => 'getAlternatives', $id . '.json'); 

    $expected = array(
     'Designitem' => 
      array(
       'id' => 1, 
       'design_id' => 1, 
       'furniture_id' => 1, 
       'template_id' => 1, 
      ), 
    ); 

    $designitems = $this->generate('Designitems', array(
     'methods' => array(
      'getAlternatives', 
     ), 
     'models' => array(
      'Designitem' => array('getItemsWithFunritures'), 
     ), 
    )); 
    $designitems->Designitem 
     ->expects($this->once()) 
     ->method('getItemsWithFunritures') 
     ->will($this->returnValue($expected)); 

    $result = $this->testAction($url); 

    $this->assertEquals(json_encode($expected), $result); 
} 

编辑：我的Designitems灯具包含一个存根条目。它看起来像这样：

class DesignitemFixture extends CakeTestFixture { 

public $fields = array(
    'id' => array('type' => 'integer', 'null' => false, 'default' => null, 'unsigned' => false, 'key' => 'primary'), 
    'design_id' => array('type' => 'integer', 'null' => false, 'default' => null, 'unsigned' => false), 
    'furniture_id' => array('type' => 'integer', 'null' => false, 'default' => null, 'unsigned' => false), 
    'template_id' => array('type' => 'integer', 'null' => true, 'default' => null, 'unsigned' => false), 
    'templateitem_id' => array('type' => 'integer', 'null' => true, 'default' => null, 'unsigned' => false), 
    'amount' => array('type' => 'integer', 'null' => false, 'default' => null, 'length' => 5, 'unsigned' => false), 
    'feedback' => array('type' => 'string', 'null' => true, 'default' => null, 'length' => 20, 'collate' => 'utf8_general_ci', 'charset' => 'utf8'), 
    'clicks' => array('type' => 'integer', 'null' => true, 'default' => '0', 'unsigned' => false), 
    'ilike' => array('type' => 'boolean', 'null' => false, 'default' => null), 
    'dislike' => array('type' => 'boolean', 'null' => false, 'default' => null), 
    'dislike_reason' => array('type' => 'string', 'null' => false, 'default' => null, 'length' => 100, 'collate' => 'utf8_general_ci', 'charset' => 'utf8'), 
    'dislike_comment' => array('type' => 'string', 'null' => false, 'default' => null, 'length' => 2000, 'collate' => 'utf8_general_ci', 'charset' => 'utf8'), 
    'parent_id' => array('type' => 'integer', 'null' => true, 'default' => null, 'unsigned' => false), 
    'has_alternatives' => array('type' => 'boolean', 'null' => true, 'default' => null), 
    'is_selected' => array('type' => 'boolean', 'null' => true, 'default' => null), 
    'is_recommendation' => array('type' => 'boolean', 'null' => true, 'default' => null), 
    'deleted' => array('type' => 'integer', 'null' => false, 'default' => null, 'length' => 4, 'unsigned' => false), 
    'deleted_date' => array('type' => 'datetime', 'null' => true, 'default' => null), 
    'created' => array('type' => 'datetime', 'null' => true, 'default' => null), 
    'modified' => array('type' => 'datetime', 'null' => true, 'default' => null), 
    'indexes' => array(
     'PRIMARY' => array('column' => 'id', 'unique' => 1) 
    ), 
    'tableParameters' => array('charset' => 'utf8', 'collate' => 'utf8_general_ci', 'engine' => 'InnoDB') 
); 

public $records = array(
    array(
     'id' => 1, 
     'design_id' => 1, 
     'furniture_id' => 1, 
     'template_id' => 1, 
     'templateitem_id' => 1, 
     'amount' => 1, 
     'feedback' => 'Lorem ipsum dolor ', 
     'clicks' => 1, 
     'ilike' => 1, 
     'dislike' => 1, 
     'dislike_reason' => 'Lorem ipsum dolor sit amet', 
     'dislike_comment' => 'Lorem ipsum dolor sit amet', 
     'parent_id' => 1, 
     'has_alternatives' => 1, 
     'is_selected' => 1, 
     'is_recommendation' => 1, 
     'deleted' => 0, 
     'deleted_date' => '2016-07-14 12:05:39', 
     'created' => '2016-07-14 12:05:39', 
     'modified' => '2016-07-14 12:05:39' 
    ), 
); 

}

当我运行测试，我得到了getItemsWithFurnitures返回错误空：

Test result

谁能告诉我，我是什么做错了？谢谢！

Answer 1

我找到了问题的解决方案。我的问题是，不是getItemsWithFurnitures返回null，但测试方法getAlternatives没有返回任何值（ - > null）。所以我必须检查设定值$this->set(...);是否与预期的数组相同。为了达到这个目的，我必须通过array('return' => 'contents')来更改testAction(...)的返回方法。然后它将返回生成的内容而不是方法返回值。工作测试看起来是这样的：

public function testGetAlternativesWithValidID() { 
    $id = 1; 
    $url = array('controller' => 'Designitems', 'action' => 'getAlternatives', $id . '.json'); 

    $this->_generateMockWithAuthUserId('Designitems', 1); 

    $expected = array(
     'Designitem' => 
      array(
       'id' => 1, 
       'design_id' => 1, 
       'furniture_id' => 1, 
       'template_id' => 1, 
      ), 
    ); 

    $data = $this->getMockForModel('Designitem', array('getItemsWithFunritures')); 
    $data->expects($this->once()) 
     ->method('getItemsWithFunritures') 
     ->will($this->returnValue($expected)); 

    $result = $this->testAction($url, array('return' => 'contents')); 

    // Delete all whitespaces from the result. 
    $result = preg_replace('/\s+/', '', $result); 
    // Add the surrounding alternatives array to the expected and convert to json-format. 
    $expected = json_encode(array('alternatives' => $expected)); 

    $this->assertEquals($expected, $result); 
} 

因为我这些项目添加到另一个数组“替代品”，而将其设置为视图，我要的预期阵列置于在这个“alternatives'阵列。由于使用的json编码方法不同，我还必须替换所有空格。为了比较它们，它们必须完全相同，所以我删除了空格和测试通行证。

我希望有人可以使用此信息。