Run-time check for update validator signature #723
Merged
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Fixes #689
This PR causes the workflow decorator to raise an exception if the workflow definition contains an (update, validator) pair with inconsistent signatures. The exception will therefore be raised at import time when running a workflow worker. We re-use the same definition of "inconsistent signatures" that we use when comparing the
@workflow.run
and workflow__init__
methods. We already had type-checking for this, but we lacked a run-time check; an exception would have been raised eventually, but at update validation time.