add keyswitch implementation

lib/components/base-components/PrimitiveComponent.ts

@@ -92,8 +92,8 @@ export abstract class PrimitiveComponent<
     ) as z.infer<ZodProps>
     if (!this.componentName) {
       this.componentName = this.constructor.name
-      this.lowercaseComponentName = this.componentName.toLowerCase()
     }
+    this.lowercaseComponentName = this.componentName.toLowerCase()
   }
 
   setProps(props: Partial<z.input<ZodProps>>) {

lib/components/primitive-components/Constraint.ts

@@ -13,6 +13,8 @@ const edgeSpecifiers = [
 export type EdgeSpecifier = (typeof edgeSpecifiers)[number]
 
 export class Constraint extends PrimitiveComponent<typeof constraintProps> {
+  componentName = "Constraint"
+
   get config() {
     return {
       zodProps: constraintProps,

tests/examples/example2-switchshaft.test.tsx

@@ -0,0 +1,63 @@
+import { test, expect } from "bun:test"
+import { getTestFixture } from "tests/fixtures/get-test-fixture"
+
+const SwitchShaft = (props: {
+  name: string
+  pcbX?: number
+  pcbY?: number
+}) => (
+  <chip
+    {...props}
+    footprint={
+      <footprint>
+        <smtpad
+          shape="rect"
+          width="2.55mm"
+          height="2.5mm"
+          portHints={["pin1"]}
+        />
+        <smtpad
+          shape="rect"
+          width="2.55mm"
+          height="2.5mm"
+          portHints={["pin2"]}
+        />
+        <platedhole
+          shape="circle"
+          name="H1"
+          holeDiameter="3mm"
+          outerDiameter="3.1mm"
+        />
+        <platedhole
+          shape="circle"
+          name="H2"
+          holeDiameter="3mm"
+          outerDiameter="3.1mm"
+        />
+        <constraint xDist="6.35mm" centerToCenter left=".H1" right=".H2" />
+        <constraint yDist="2.54mm" centerToCenter top=".H1" bottom=".H2" />
+        <constraint edgeToEdge xDist="11.3mm" left=".pin1" right=".pin2" />
+        <constraint sameY for={[".pin1", ".H1"]} />
+        <constraint sameY for={[".pin2", ".H2"]} />
+        <constraint
+          edgeToEdge
+          xDist={(11.3 - 6.35 - 3) / 2}
+          left=".pin1"
+          right=".H1"
+        />
+      </footprint>
+    }
+  />
+)
+
+test("example2-switchshaft", async () => {
+  const { circuit } = getTestFixture()
+
+  circuit.add(
+    <board width="10mm" height="10mm">
+      <SwitchShaft name="S1" />
+    </board>,
+  )
+
+  expect(circuit.getCircuitJson()).toMatchPcbSnapshot(import.meta.path)
+})