derived-variables.cy.ts:97 expected dc-derived-first on the REGION header,
because the comment assumed REGION opens the computed block. The grid follows
MPE_DERIVED order, and that order is LINE_VALUE, REGION, REGION_LABEL - so the
marker was on LINE_VALUE and correct. The spec asserted the wrong column, and
the development pipeline has been red on it since.
Dumping the header row on a local mock estate (sasjs/server desktop mode,
RUN_TIMES=js) shows:
6 | LINE_VALUE | dc-derived-header dc-derived-first
7 | REGION | dc-derived-header
8 | REGION_LABEL | dc-derived-header beforeHiddenColumn htLastVisibleHeader
and the same dump against the unmodified release/7.19 client, so this was never
a client defect.
The assertion now states the invariant instead: at least one derived header, the
first of them opens the block, and no other one carries the marker. That holds
whatever order the control table returns the variables in.
dc