Checks as values, the five universal checks, metrics, ProfileRejected,
and the report block. Completes the shared layer; only the profiles and
build() remain.
Report numbers are rounded to six significant figures on the way out,
matching OpenSCAD echo, which is C %g at default precision. The oracle
records what OpenSCAD printed, not full-precision geometry.
This is load bearing rather than cosmetic. VOLUME_MM3 ends in _MM3, so
test_oracle.py compares it at the lengths tolerance of 1e-4 and not the
areas tolerance of 1e-3. Volume is section area times a 100 mm length,
so an unrounded port reporting 13557.402 against a recorded 13557.4
fails by twenty times the tolerance while being geometrically correct.
Verified against the oracle: across all 113 accepted cases the recorded
volume equals the rounded area times length to within 3.6e-12, which
holds only if volume is computed unrounded and rounded at print. That is
what this layer does.
The consequence is that geometry must agree with the reference to better
than one part in a million before rounding. Near a rounding boundary a
smaller error can still tip the last digit, and that will show up as a
single case failing by one unit in the last place rather than as
something mysterious.
28 tests. Nine mutations, all caught first pass, including rounding to
decimal places instead of significant figures and computing volume from
the already-rounded area.
Oracle acceptance still skips; 236 unchanged.
TheRON
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