Automatic Testing Currently we have a handful of core printers working correctly, the intention is to make sure they stay working after adding new printers. This is where testing comes in. before now testing had to be done manually by comparing the result from the gdb console to the expected output. This becomes inconvenient real quick if this is repeated for every class and its output. With manual testing you cannot test if the display_hint strings works correctly and if the index of a list, map or set shown correctly.