Sascha Mann (Nov 05 2022 at 10:02): Sascha Mann (Nov 05 2022 at 10:02):#35872 changed uuid4() to not use the global RNG anymore which means seed! will no longer affect it.
I have a function that generates a UUID and writes it to a file. The tests should check that the file contains that UUID, therefore it needs to be reproducible somehow. Real example: julia-actions/GitHubActions.jl#26
Is there a good way to accomplish this without creating a custom RNG in the library code that can then be seeded in the test code? The latter would work but it seems like a bad practice
Sukera (Nov 05 2022 at 10:06):(deleted)
Sukera (Nov 05 2022 at 10:07):well I should read PRs before commenting
Sukera (Nov 05 2022 at 10:07):in any case, having a dedicated RNG for your usecase is perfectly fine
Sukera (Nov 05 2022 at 10:08):another option would be to see if there's a need to check for the exact UUID at all, or if it's sufficient that _a_ UUID is there
Sascha Mann (Nov 05 2022 at 10:19):Thanks, I'll use a dedicated RNG then
Sascha Mann (Nov 05 2022 at 10:20):Checking if it contains some UUID in the right places would work for all but one edge case, otherwise I like that idea
Sascha Mann (Nov 05 2022 at 10:36):I think I found an even better way in the upstream code that I'm reimplementing in Julia: Instead of seeding the RNG, mock uuid4() to return a specific UUID4. That addresses the edge case and doesn't require changes to the library code itself
Last updated: Oct 02 2023 at 04:34 UTC