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Chapter 25. Dependency-Breaking Techniques > Encapsulate Global References
Encapsulate Global References
When you are trying to test code that has problematic dependencies on globals, you essentially have three choices. You can try to make the globals act differently under test, you can link to different globals, or you can encapsulate the globals so that you can decouple things further. The last option is called Encapsulate Global References. Here is an example in C++:
bool AGG230_activeframe[AGG230_SIZE];
bool AGG230_suspendedframe[AGG230_SIZE];
void AGGController::suspend_frame()
{
frame_copy(AGG230_suspendedframe,
AGG230_activeframe);
clear(AGG230_activeframe);
flush_frame_buffers();
}
void AGGController::flush_frame_buffers()
{
for (int n = 0; n < AGG230_SIZE; ++n) {
AGG230_activeframe[n] = false;
AGG230_suspendedframe[n] = false;
}
}
