repro crystal circuit

tests/repros/assets/repro-crystal-load-capacitors.input.json

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+{
+  "chips": [
+    {
+      "chipId": "schematic_component_0",
+      "center": {
+        "x": 0,
+        "y": 0
+      },
+      "width": 1.1,
+      "height": 0.54,
+      "pins": [
+        {
+          "pinId": "Y1.1",
+          "x": -0.55,
+          "y": 0,
+          "_facingDirection": "x-"
+        },
+        {
+          "pinId": "Y1.2",
+          "x": 0.55,
+          "y": 0,
+          "_facingDirection": "x+"
+        }
+      ]
+    },
+    {
+      "chipId": "schematic_component_1",
+      "center": {
+        "x": -0.41500000000000004,
+        "y": -1.52
+      },
+      "width": 0.9199999999999999,
+      "height": 0.7599999999999998,
+      "pins": [
+        {
+          "pinId": "C19.1",
+          "x": -0.55,
+          "y": -1.1400000000000001,
+          "_facingDirection": "y+"
+        },
+        {
+          "pinId": "C19.2",
+          "x": -0.55,
+          "y": -1.9,
+          "_facingDirection": "y-"
+        }
+      ]
+    },
+    {
+      "chipId": "schematic_component_2",
+      "center": {
+        "x": 0.685,
+        "y": -1.52
+      },
+      "width": 0.9199999999999999,
+      "height": 0.7599999999999998,
+      "pins": [
+        {
+          "pinId": "C20.1",
+          "x": 0.55,
+          "y": -1.1400000000000001,
+          "_facingDirection": "y+"
+        },
+        {
+          "pinId": "C20.2",
+          "x": 0.55,
+          "y": -1.9,
+          "_facingDirection": "y-"
+        }
+      ]
+    }
+  ],
+  "directConnections": [],
+  "netConnections": [
+    {
+      "netId": "XIN",
+      "pinIds": [
+        "Y1.1",
+        "C19.1"
+      ],
+      "netLabelWidth": 0.48
+    },
+    {
+      "netId": "XOUT",
+      "pinIds": [
+        "Y1.2",
+        "C20.1"
+      ],
+      "netLabelWidth": 0.6
+    },
+    {
+      "netId": "GND",
+      "pinIds": [
+        "C19.2",
+        "C20.2"
+      ],
+      "netLabelWidth": 0.42,
+      "netLabelHeight": 0.48
+    }
+  ],
+  "textBoxes": [],
+  "availableNetLabelOrientations": {
+    "XIN": [
+      "x-",
+      "x+"
+    ],
+    "XOUT": [
+      "x-",
+      "x+"
+    ],
+    "GND": [
+      "y-"
+    ]
+  },
+  "maxMspPairDistance": 2.4,
+  "_hideRatsNet": false
+}

tests/repros/repro-crystal-load-capacitors.test.ts

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+import { expect, test } from "bun:test"
+import { SchematicTracePipelineSolver } from "lib/solvers/SchematicTracePipelineSolver/SchematicTracePipelineSolver"
+import "tests/fixtures/matcher"
+import inputProblem from "./assets/repro-crystal-load-capacitors.input.json"
+
+// InputProblem extracted from a tscircuit circuit: a 12MHz crystal (Y1) wired
+// to two 22pF load capacitors (C19, C20) via the XIN and XOUT nets, with both
+// capacitor bottom pins tied to GND. Generated by rendering the circuit in
+// @tscircuit/core and capturing the "solver:started" event for
+// SchematicTracePipelineSolver.
+test("repro crystal with load capacitors routes XIN, XOUT, GND nets", () => {
+  const solver = new SchematicTracePipelineSolver(inputProblem as any)
+
+  const getPin = (pinId: string) =>
+    solver.inputProblem.chips
+      .flatMap((chip) => chip.pins)
+      .find((pin) => pin.pinId === pinId)!
+
+  expect(getPin("Y1.1").x).toBeCloseTo(getPin("C19.1").x)
+  expect(getPin("Y1.2").x).toBeCloseTo(getPin("C20.1").x)
+  expect(getPin("C19.2").y).toBeCloseTo(getPin("C20.2").y)
+
+  solver.solve()
+
+  expect(solver.schematicTraceLinesSolver?.failedConnectionPairs).toHaveLength(
+    0,
+  )
+  expect(solver).toMatchSolverSnapshot(import.meta.path)
+})