Ryan Malloy
3bf4f6bed2
Ports the read path of FreeRouting's io/specctra/parser package to a Java-free Python implementation: - tokenizer: S-expression lexer mirroring SpecctraFileDescription.flex (comments, quoted strings, the string_quote IGNORE_QUOTE directive, case-insensitive keywords, and hash-prefixed names) - sexp: nested S-expression tree builder - shapes: rect/circle/polygon/path plus area-with-holes scopes - model: typed dataclasses for layers, padstacks, images, placements, nets, net classes, rules, keepouts - reader: recursive-descent scope readers producing a DsnBoard, one _read_* function per FreeRouting read_scope method 46 pytest cases cover the tokenizer, tree, shapes, and end-to-end parsing against hand-crafted fixtures modeled on FreeRouting's own test DSN files. Parses 90 of 91 upstream fixtures (the one failure is a binary OLE file, not text DSN).
75 lines
2.0 KiB
Python
75 lines
2.0 KiB
Python
"""Tests for DSN shape parsing."""
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from __future__ import annotations
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from freeroute.dsn.sexp import parse
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from freeroute.dsn.shapes import (
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Circle,
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Path,
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Polygon,
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Rectangle,
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read_area,
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read_shape,
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)
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def shape_of(text: str):
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return read_shape(parse(text))
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def test_rectangle():
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rect = shape_of("(rect Top -400 -100 400 100)")
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assert isinstance(rect, Rectangle)
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assert rect.layer == "Top"
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assert rect.coords == [-400.0, -100.0, 400.0, 100.0]
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def test_circle_with_center():
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circ = shape_of("(circle Bottom 600 10 20)")
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assert isinstance(circ, Circle)
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assert circ.diameter == 600.0
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assert (circ.center_x, circ.center_y) == (10.0, 20.0)
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def test_circle_without_center_defaults_to_origin():
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circ = shape_of("(circle Top 600)")
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assert isinstance(circ, Circle)
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assert (circ.center_x, circ.center_y) == (0.0, 0.0)
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def test_polygon():
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poly = shape_of("(polygon signal 0 0 0 100 0 100 100 0 100)")
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assert isinstance(poly, Polygon)
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assert poly.aperture_width == 0.0
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assert poly.coords == [0.0, 0.0, 100.0, 0.0, 100.0, 100.0, 0.0, 100.0]
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def test_path_is_width_plus_points():
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path = shape_of("(path pcb 0 0 0 150000 0 150000 -90000)")
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assert isinstance(path, Path)
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assert path.width == 0.0
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assert path.coords == [0.0, 0.0, 150000.0, 0.0, 150000.0, -90000.0]
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def test_unknown_shape_returns_none():
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assert shape_of("(mystery Top 1 2)") is None
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def test_area_border_name_and_clearance():
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area = read_area(parse('(keepout "kz" (rect Top 0 0 10 10) (clearance_class special))'))
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assert area is not None
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assert area.name == "kz"
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assert isinstance(area.border, Rectangle)
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assert area.clearance_class == "special"
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assert area.holes == []
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def test_area_with_window_hole():
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area = read_area(
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parse("(keepout (polygon Top 0 0 0 0 100 100 100 100 0) (window (rect Top 10 10 20 20)))")
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)
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assert area is not None
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assert isinstance(area.border, Polygon)
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assert len(area.holes) == 1
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assert isinstance(area.holes[0], Rectangle)
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