Adding tests

[iyxan23]

Having tests would ensure zipalign-java works as expected. Lately many bugs have been occurring due to reckless merges by myself.

One question though: what kinds of tests should we do? zipaligning zips and shasum-ing them? if we were to, wouldn't introducing zips to the repo would make it heavier? i don't think people should get test zip files (that may be large) when they're cloning zipalign-java.

[MohammedKHC]

I think for now It will be great if the official tests are ported.
Here it is https://android.googlesource.com/platform/build/+/refs/heads/main/tools/zipalign/tests/src/align_test.cpp
The test zips are available at (Inside the repo, BTW i don't think that those are big files)
https://android.googlesource.com/platform/build/+/refs/heads/main/tools/zipalign/tests/data

[iyxan23]

Thanks for the references! Those look very useful.

I will be checking it out later, feel free if you want to contribute this yourself.