Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Motivation
It's possible to detect unit test failures due to external factors, such as new releases of depending libraries, faster. Currently, we cannot really detect such failures until for instance a PR is updated to trigger CircleCI/GitHub Actions unit tets.
Follow-up to #1352.
Description of the changes
Adds daily cron triggers to unit tests. The interval is the same as in the stale bot https://github.com/optuna/optuna/blob/master/.github/workflows/stale.yml.