AuthorMapping: fix self key rotation #1086
Merged
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This PR fixes a bug where calling
AuthorMapping.updateAssociation(a, a)
where the same NimbusId is used for both the old and new ids, caused the mapping to be removed.While there is no valid use case for making such a call, it's clear that the semantics should be leaving the association unchanged (or perhaps erroring).
Also adds a test for this case.