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https://issues.apache.org/jira/browse/ARROW-14458?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17433651#comment-17433651
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Nicola Crane commented on ARROW-14458:
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I guess there also may be further complications for the tests for functions
which raise both the original C++ error and an extra R error message too.
> [R] Use expect_snapshot() to improve tests in dplyr funcs strings
> -----------------------------------------------------------------
>
> Key: ARROW-14458
> URL: https://issues.apache.org/jira/browse/ARROW-14458
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Reporter: Dragoș Moldovan-Grünfeld
> Assignee: Dragoș Moldovan-Grünfeld
> Priority: Major
> Fix For: 7.0.0
>
>
> This comes from [Romain's
> suggestion|https://github.com/apache/arrow/pull/11502/files/2a8a139b727acb13019da6176444578ead6bf208#r735351673]
> to transform the test that rely on capturing a string by using a snapshot
> test (added in {{testthat}}'s 3rd edition).
> A test like:
> {code:r}
> expect_error(expression, message)
> {code}
> becomes
> {code:r}
> expect_snapshot({
> (expect_error(expression))
> })
> {code}
> This is probably a more general improvement we can make to our unit tests
> (i.e. to make more extensive use of the snapshot functionality), but I
> thought I'd focus on one test file to begin with.
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