模拟正在测试的当前类的内部函数调用

Question

I want to test this function:

public function reset()
{
    if(!$this->onBeforeReset())      // Protected, internal method
    {
         return false;
    }

    // Continue with tests
}

I'd wish to test it when onBeforeReset function return false or true, too.
How can I do that? Is that possible?
Is there a way to "mock" some parts of the class under test?

Answer 1

Yes, unless the method you want to mock is private or final you can mock just this one method. An example:

$sut = $this->getMock('Your\Class', array('onBeforeReset'));

The second argument of getMock method is array contains methods that phpunit will mock. If this array is empty phpunit will mock all methods from the object, but if you precise at least one method phpunit will mock only methodz you pass into this array.

And you mock method as usual:

$sut->expects($this->any())
    ->method('onBeforeReset')
    ->will($this->returnValue(true));

And finally you can test the method you want to test:

$this->assertWhatever($expectedValue, $sut->reset());