Change in flashrom[master]: [FIX ME] tests: Add test for extract operation

[Daniel Campello (Code Review)]

Attention is currently required from: Edward O'Callaghan, Anastasia Klimchuk, Peter Marheine.
Daniel Campello has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/59532 )

Change subject: [FIX ME] tests: Add test for extract operation
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Patch Set 2:

(1 comment)

Patchset:

PS1:
> Failing looks like correct behavior to me, since `read_flash_to_file` will never have a meaningful r […]

I believe Peter is right and there is some issues due to the differences between the Chromium fork and here (differences on https://review.coreboot.org/c/flashrom/+/52362). With respect on how the read actually happens (we are not throwing away the results), this is done via the logic in prepare_layout_for_extraction() coupled with write_buf_to_include_args() in read_flash_to_file()