Refactor verify_overlaps to make it testable and add tests for the
comparison. It does make one significant change in behavior which is to
read each of the files produced by a bootclasspath_fragment into a dict
before comparison, rather than reading and comparing them a row at a
time. That allows it to reuse the code to read a CSV into a dict.
Bug: 194063708
Test: atest --host verify_overlaps_test
m out/soong/hiddenapi/hiddenapi-flags.csv
- manually change files to cause difference in flags to check
that it detects the differences.
Change-Id: Ib70ac87fe089fc25e3bef18f367d4939bfc0cb8d
Bug: 179354495
Test: m out/soong/hiddenapi/hiddenapi-stub-flags.txt
- check that an error is reported if a modular stub-flags.csv file,
i.e. one created by a fragment is not a subset of the monolithic
file, e.g. because a signature in the modular file has different
flags than it does in the monolithic or is not present there.
Change-Id: I46ebb495cb093a5e3abe7571c49933c845318549
This makes sure that where there is overlap between the hidden API
flags generated for a module and the monolithic flags that they are
identical. That ensures that the modular hidden API flags will be
compatible with previous releases that relied on the monolithic flags.
Bug: 179354495
Test: m out/soong/.intermediates/art/build/boot/art-bootclasspath-fragment/android_common_apex10000/modular-hiddenapi/all-flags.csv
m out/soong/hiddenapi/hiddenapi-flags.csv
- Create some inconsistencies between the above two files.
m out/soong/hiddenapi/hiddenapi-flags.csv.valid
Change-Id: Iaf9e23cef63e221608955d89dc8d496bcc70c86e
