# DSN test fixtures

Hand-crafted minimal Specctra DSN files, written to exercise the parser. They
are modeled on the real fixtures shipped in the upstream FreeRouting repo
(`fixtures/empty_board.dsn` and `fixtures/SMD-routing-issue-demo.dsn`) so the
grammar and formatting match what `kicad-cli pcb export specctra-dsn` and
FreeRouting itself produce, but they were typed fresh here (no upstream file is
copied into this tree).

- `empty_board.dsn` — the smallest valid board: parser, resolution, unit, and a
  structure with two signal layers and a `pcb` boundary path. Modeled on
  FreeRouting `fixtures/empty_board.dsn`.
- `smd_demo.dsn` — a fuller board exercising every scope the parser handles:
  quoted board/padstack/image names, `via`, default `rule` (width + clearance
  with a `(type smd_smd)` pair), a `keepout`, padstacks (rect and circle pads),
  images with pins, placement with `front`/rotation, nets with `Comp-Pin`
  references, and a `class` with `circuit`/`use_via` and a `rule`. Modeled on
  FreeRouting `fixtures/SMD-routing-issue-demo.dsn`.
</content>