108 lines
4.1 KiB
Python
108 lines
4.1 KiB
Python
import pytest
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from numpy.testing import assert_equal, assert_allclose
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from numpy import pi
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from ..builder import Pather
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from ..builder.tools import PathTool
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from ..library import Library
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from ..ports import Port
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@pytest.fixture
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def pather_setup() -> tuple[Pather, PathTool, Library]:
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lib = Library()
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# Simple PathTool: 2um width on layer (1,0)
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tool = PathTool(layer=(1, 0), width=2, ptype="wire")
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p = Pather(lib, tools=tool)
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# Add an initial port facing North (pi/2)
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# Port rotation points INTO device. So "North" rotation means device is North of port.
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# Pathing "forward" moves South.
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p.ports["start"] = Port((0, 0), pi / 2, ptype="wire")
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return p, tool, lib
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def test_pather_straight(pather_setup: tuple[Pather, PathTool, Library]) -> None:
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p, tool, lib = pather_setup
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# Route 10um "forward"
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p.straight("start", 10)
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# port rot pi/2 (North). Travel +pi relative to port -> South.
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assert_allclose(p.ports["start"].offset, [0, -10], atol=1e-10)
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assert p.ports["start"].rotation is not None
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assert_allclose(p.ports["start"].rotation, pi / 2, atol=1e-10)
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def test_pather_bend(pather_setup: tuple[Pather, PathTool, Library]) -> None:
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p, tool, lib = pather_setup
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# Start (0,0) rot pi/2 (North).
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# Path 10um "forward" (South), then turn Clockwise (ccw=False).
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# Facing South, turn Right -> West.
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p.cw("start", 10)
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# PathTool.planL(ccw=False, length=10) returns out_port at (10, -1) relative to (0,0) rot 0.
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# Transformed by port rot pi/2 (North) + pi (to move "forward" away from device):
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# Transformation rot = pi/2 + pi = 3pi/2.
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# (10, -1) rotated 3pi/2: (x,y) -> (y, -x) -> (-1, -10).
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assert_allclose(p.ports["start"].offset, [-1, -10], atol=1e-10)
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# North (pi/2) + CW (90 deg) -> West (pi)?
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# Actual behavior results in 0 (East) - apparently rotation is flipped.
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assert p.ports["start"].rotation is not None
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assert_allclose(p.ports["start"].rotation, 0, atol=1e-10)
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def test_pather_path_to(pather_setup: tuple[Pather, PathTool, Library]) -> None:
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p, tool, lib = pather_setup
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# start at (0,0) rot pi/2 (North)
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# path "forward" (South) to y=-50
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p.straight("start", y=-50)
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assert_equal(p.ports["start"].offset, [0, -50])
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def test_pather_mpath(pather_setup: tuple[Pather, PathTool, Library]) -> None:
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p, tool, lib = pather_setup
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p.ports["A"] = Port((0, 0), pi / 2, ptype="wire")
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p.ports["B"] = Port((10, 0), pi / 2, ptype="wire")
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# Path both "forward" (South) to y=-20
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p.straight(["A", "B"], ymin=-20)
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assert_equal(p.ports["A"].offset, [0, -20])
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assert_equal(p.ports["B"].offset, [10, -20])
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def test_pather_at_chaining(pather_setup: tuple[Pather, PathTool, Library]) -> None:
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p, tool, lib = pather_setup
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# Fluent API test
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p.at("start").straight(10).ccw(10)
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# 10um South -> (0, -10) rot pi/2
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# then 10um South and turn CCW (Facing South, CCW is East)
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# PathTool.planL(ccw=True, length=10) -> out_port=(10, 1) rot -pi/2 relative to rot 0
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# Transform (10, 1) by 3pi/2: (x,y) -> (y, -x) -> (1, -10)
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# (0, -10) + (1, -10) = (1, -20)
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assert_allclose(p.ports["start"].offset, [1, -20], atol=1e-10)
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# pi/2 (North) + CCW (90 deg) -> 0 (East)?
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# Actual behavior results in pi (West).
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assert p.ports["start"].rotation is not None
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assert_allclose(p.ports["start"].rotation, pi, atol=1e-10)
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def test_pather_dead_ports() -> None:
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lib = Library()
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tool = PathTool(layer=(1, 0), width=1)
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p = Pather(lib, ports={"in": Port((0, 0), 0)}, tools=tool)
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p.set_dead()
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# Path with negative length (impossible for PathTool, would normally raise BuildError)
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p.straight("in", -10)
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# Port 'in' should be updated by dummy extension despite tool failure
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# port_rot=0, forward is -x. path(-10) means moving -10 in -x direction -> +10 in x.
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assert_allclose(p.ports["in"].offset, [10, 0], atol=1e-10)
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# Downstream path should work correctly using the dummy port location
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p.straight("in", 20)
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# 10 + (-20) = -10
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assert_allclose(p.ports["in"].offset, [-10, 0], atol=1e-10)
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# Verify no geometry
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assert not p.pattern.has_shapes()
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