- the migration fills mood_a1 from the five-point label for every row
that has none, and leaves the other four columns empty because there
is nothing in a label to derive them from
- guarded on the column being empty, so re-applying the migration is a
no-op rather than an overwrite of an answer somebody gave since
- the test reads the CASE arms back out of the .sql and compares them to
the runtime map in both directions, so neither can drift alone
- rows are asserted by value after the statement runs, and again after a
second run, including one hand-set value that must survive it
