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fix(task-25): page_setup_truth and settings_pdf_mediabox_a3 move the sheet to ANSI B before proving A3

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A fresh Layout1 is already ISO A3 landscape (ezdxf R2018 default: 420 x 297,
plot_rotation 0), so an A3-only /MediaBox read-back passed with
page_setup_apply stubbed to a no-op: the A/B gate row and the v4 matrix task
could not fail on the setter. Both now apply ANSI B (432 x 279, a size no
fresh document has; spec section 9 names it) and read that PDF first, then
apply ISO A3, read its PDF, and require the setter's changed.size_mm to have
moved from B to A3. The stub fails at the first PDF.

The moved-sheet comparison is +/-0.5 mm, the spec's tolerance, not exact:
measured live on AutoCAD 2026 (scratch Documents.Add(), closed unsaved), the
COM engine reports ANSI B as 431.8 x 279.4 and the DWG To PDF.pc3 file's
MediaBox as 431.8 x 279.4 then 420.158 x 297.039 for A3; the task passes
there with changed.size_mm [[431.8, 279.4], [420.0, 297.0]]. Headless it is
[[432.0, 279.0], [420.0, 297.0]].

tests/test_benchmark_v4.py gains the mutation test the finding describes
(setter stubbed -> both rows must fail; both passed on the old code) and a
run of the gate row itself; the headless task test asserts the B stage.
README rows and the tasks_v4 docstring say what the task now does; the README
collected-tests figure follows the two new tests (3282 -> 3284). The
regenerated A/B report against v1.5.1 is byte-identical (26 -> 32/32).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
This commit is contained in:
Umut CAN
2026-09-22 13:27:17 +03:00
co-authored by Claude Opus 5
parent c2942d3c94
commit 18c7c69da6
6 changed files with 134 additions and 14 deletions
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benchmarks/README.md
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@@ -95,7 +95,7 @@ fail on their own:
| Task | Category | Verified against |
|---|---|---|
| `pid_roundtrip` | pid | the example spec drawn through `pid_from_spec`'s code, then read back by the graph builder, which never sees the spec: 5 nodes, 4 edges, 0 dangling ends, `confidence_min` 1.0, zero critique issues, an instrument index of exactly `FIC-101` wired to `FCV-101`, and the two authored line numbers back on the two process lines while the two unnumbered lines carry sequence-built numbers from XDATA |
| `page_setup_truth` | pagesetup | `page_setup_apply("Layout1", ISO_A3 landscape 1:1)` then `batch_plot`; the PDF's own `/MediaBox` must parse to 420 × 297 mm (±0.5), the page-setup list must say `ISO_A3` / `landscape` / `[420, 297]`, and the ctb must be a known one |
| `page_setup_truth` | pagesetup | `page_setup_apply("Layout1", ANSI_B landscape 1:1)` then `batch_plot` — the PDF's own `/MediaBox` must parse to 432 × 279 mm (±0.5), a size no fresh document has; then `page_setup_apply("Layout1", ISO_A3 landscape 1:1)` and `batch_plot` again — 420 × 297, the setter's `changed.size_mm` must read `[[432, 279], [420, 297]]`, the page-setup list must say `ISO_A3` / `landscape` / `[420, 297]`, and the ctb must be a known one. A setter that writes nothing fails at the first PDF (`tests/test_benchmark_v4.py` stubs it to prove that) |
The competitor reports carry no result for either, for the same reason they
carry none for the v3 five. `--matrix v3` reproduces the v1.5 set exactly.