phpunit - mockbuilder - 设置模拟对象内部属性 [英] phpunit - mockbuilder - set mock object internal property

问题描述

是否可以创建一个禁用构造函数并手动设置受保护属性的模拟对象?

Is it possible to create a mock object with disabled constructor and manually setted protected properties?

这是一个愚蠢的例子:

class A {
    protected $p;
    public function __construct(){
        $this->p = 1;
    }

    public function blah(){
        if ($this->p == 2)
            throw Exception();
    }
}

class ATest extend bla_TestCase {
    /** 
        @expectedException Exception
    */
    public function testBlahShouldThrowExceptionBy2PValue(){
        $mockA = $this->getMockBuilder('A')
            ->disableOriginalConstructor()
            ->getMock();
        $mockA->p=2; //this won't work because p is protected, how to inject the p value?
        $mockA->blah();
    }
}

所以我想注入受保护的 p 值，所以我不能.我应该定义 setter 还是 IoC，或者我可以用 phpunit 来做?

So I wanna inject the p value which is protected, so I can't. Should I define setter or IoC, or I can do this with phpunit?

推荐答案

你可以使用反射将属性设为public，然后设置所需的值:

You can make the property public by using Reflection, and then set the desired value:

$a = new A;
$reflection = new ReflectionClass($a);
$reflection_property = $reflection->getProperty('p');
$reflection_property->setAccessible(true);

$reflection_property->setValue($a, 2);

无论如何，在您的示例中，您不需要为要引发的异常设置 p 值.您正在使用模拟来控制对象的行为，而无需考虑其内部.

Anyway in your example you don't need to set p value for the Exception to be raised. You are using a mock for being able to take control over the object behaviour, without taking into account it's internals.

因此，不是设置 p = 2 来引发异常，而是将模拟配置为在调用 blah 方法时引发异常:

So, instead of setting p = 2 so an Exception is raised, you configure the mock to raise an Exception when the blah method is called:

$mockA = $this->getMockBuilder('A')
        ->disableOriginalConstructor()
        ->getMock();
$mockA->expects($this->any())
         ->method('blah')
         ->will($this->throwException(new Exception));

最后，奇怪的是你在 ATest 中模拟 A 类.您通常模拟您正在测试的对象所需的依赖项.

Last, it's strange that you're mocking the A class in the ATest. You usually mock the dependencies needed by the object you're testing.

希望这会有所帮助.

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