It's a nice thing to have the memoryBufferParameter in this form but I think it would have been way better to only implement the input parameter forwarding then use the MEMCMP from the test case. I still need the input parameter forwarding for the "write type" functions but now it would be a complete mess to add this feature next to the memoryBufferParameter.
There are cases when you need to get out some information from the code under test into the test case and use it. It's not enough to have the currently implemented memoryBufferParameter because sometimes you don't know the expected value of the parameter. For example if it's a pointer to a class' member variable.