test 'not regenerate all subindexes' doesn't actually test that

[softmoth]

The test case 'not regenerate all subindexes' in t/102-update.t does not verify that unused subindexes are not regenerated.

1. Looking at line 52, it saves timestamps only for the subindexes that will be changed.
2. At line 64, it verifies that all of the changed subindexes have a newer timestamp.
3. At no place does it verify that the other subindexes have the original timestamp.

[JJ]

🤔

[JJ]

Well, it's updating everything. I'm starting to think that the problem is that's it's actually testing changes since the script was started, which means it changed everything, instead of just the two files that were altered. But I'm not totally sure about that, and generating the cache all over takes time.

[JJ]

I drilled it down to list-files from Pod::From::Cache returning all files instead of only modified files. I really have no idea why this happens, and it does not seem to be an actual problem otherwise. Must be the test environment...