[flashrom-gerrit] Change in flashrom[master]: tests: Add NOT_ZERO and NOT_NULL macros to the header file

[Edward O'Callaghan (Code Review)]

Attention is currently required from: Nico Huber, Angel Pons, Anastasia Klimchuk.
Edward O'Callaghan has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/57269 )

Change subject: tests: Add NOT_ZERO and NOT_NULL macros to the header file
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Patch Set 1:

(2 comments)

File tests/io_mock.h:

https://review.coreboot.org/c/flashrom/+/57269/comment/6ae282cb_b652a755 
PS1, Line 37: NOT
NONZERO ?

https://review.coreboot.org/c/flashrom/+/57269/comment/687488af_c3b05cd2 
PS1, Line 38:  NOT_NULL ((void *)NOT_ZERO)
I wonder if this should be a function ptr address so that you can set a break point on the address easily as it has a named symbol associated with the address number. A stub function would be sufficient to serve this purpose. `void * nonnull(void) { return (void *)NONZERO; }`