stan-dev / stan-dev/rstantools

Use testthat 3e

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@VisruthSK is already working on this.

Since Jul 24, 2026.

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R
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Description

Use the latest edition of testthat and convert appropriate tests to snapshots. See https://github.com/stan-dev/loo/pull/289 for a similar thing in loo.

Shouldn't be that difficult, even for a new contributor. If unfamiliar with testthat, read migration post as well as testthat 3e vignette.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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