Enforce that snapshot files should be unique #1592
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Can not use `SnapshotReporter$snap_file_seen` as it is encouraged to use this field via `announce_snapshot_file(file)` to avoid files being deleted. However, if we record what has been saved, then no saved file should be duplicated. Once a new test file starts, `$snap_file_saved` should be reset
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It seems odd that two different tests can save to the same snapshot file without error. This PR enforces that once a snapshot file has had an expectation, it can not have another expectation.
I tried doing this in
{shinytest2}, but it felt like a giant hack and should be pushed upstream to{testthat}.Implementation details:
We can not use
SnapshotReporter$snap_file_seenas it is encouraged to use this field viaannounce_snapshot_file(file)to avoid files being deleted.However, if we record what has been saved, then no saved file should be duplicated. Once a new test file starts,
$snap_file_savedshould be reset