> The basic unit of code is the procedure, not abstract entities like DateTimeCalculator or EmployeePayrollManager. I agree, but in almost any non-trivial well

> The basic unit of code is the procedure, not abstract entities like DateTimeCalculator or EmployeePayrollManager. I agree, but in almost any non-trivial well-run C project the basic unit is going to be datatypes, opaque pointers, modules, etc. In that case I generally throw in a `bool MyObjectType_test(void)` into the module so, in some sense, I'll have some basic sort of testing. Not as nice as the OO languages provide, but enough to give myself some confidence that changes don't introduce blatant bugs.