一个单元如何测试在循环中创建对象的函数 - How does one unit test function that creates objects in loop?

How does one unit test function that creates objects in loop?

我一直试图解耦依赖项，以便在类中对函数进行单元测试，但我遇到了一个问题，即我有一个函数在数据数组中循环，并根据数据创建新对象。新对象对数据执行自己的INSERT。

我该如何编写这个函数，以便模拟要在循环中创建的对象？

public function createObjects($array_of_data)
{
   $new_objects = [];
   foreach($array_of_data as $data)
   {
       //do some stuff with the data
       $new_object = new newObject($data);
       $new_object->saveToDB();
       $new_objects[] = $new_object;
   }
   return $new_objects;
}

我建议创建一个新的工厂类，将该类注入createObjects()方法（或通过该类的构造函数，或通过setter方法），然后在测试createObjects()时嘲笑该工厂。

下面是一个简单的例子。一定要注意YourClass::createObjects()方法中的FactoryInterface类型提示，这使得所有这些都成为可能：

interface FactoryInterface
{
    public function createObject($data);
}
class ObjectFactory implements FactoryInterface
{
    public function createObject($data)
    {
        return new newObject($data);
    }
}
class YourClass
{
    public function createObjects($array_of_data, FactoryInterface $objectFactory)
    {
        $new_objects = [];
        foreach ($array_of_data as $data) {
            $new_objects[] = $objectFactory->createObject($data);
        }
        return $new_objects;
    }
}
class MockObjectFactory implements FactoryInterface
{
    public function createObject($data)
    {
        // Here, you can return a mocked newObject rather than an actual newObject
    }
}
class YourClassTest extends PHPUnit_Framework_TestCase
{
    public function testCreateObjects()
    {
        $classUnderTest = new YourClass();
        $new_objects    = $classUnderTest->createObjects(
            [1, 2, 3], // Your object initialization data.
            new MockObjectFactory()
        );
        // Perform assertions on $new_objects
    }
}