checkpoint gerber rendering with snapshots

bunfig.toml

@@ -0,0 +1,2 @@
+[test]
+preload = ["./tests/fixtures/preload.ts"]

package.json

@@ -6,12 +6,14 @@
   "devDependencies": {
     "@tscircuit/soup": "^0.0.58",
     "@types/bun": "latest",
+    "gerber-to-svg": "^4.2.8",
     "tsup": "^8.2.4"
   },
   "peerDependencies": {
     "typescript": "^5.0.0"
   },
   "dependencies": {
+    "bun-match-svg": "^0.0.1",
     "fast-json-stable-stringify": "^2.1.0"
   }
 }

tests/fixtures/preload.ts

@@ -0,0 +1,33 @@
+import "bun-match-svg"
+import { expect } from "bun:test"
+import gerberToSvg from "gerber-to-svg"
+
+async function toMatchGerberSnapshot(
+  this: any,
+  gerberOutput: Record<string, string>,
+  testPathOriginal: string,
+  svgName?: string,
+) {
+  const svg = await new Promise((resolve, reject) => {
+    gerberToSvg(gerberOutput.Edge_Cuts, {}, (err, svg) => {
+      if (err) return reject(err)
+      resolve(svg)
+    })
+  })
+
+  return expect(svg).toMatchSvgSnapshot(import.meta.path, svgName)
+}
+
+expect.extend({
+  // biome-ignore lint/suspicious/noExplicitAny:
+  toMatchGerberSnapshot: toMatchGerberSnapshot as any,
+})
+
+declare module "bun:test" {
+  interface Matchers<T = unknown> {
+    toMatchGerberSnapshot(
+      testPath: string,
+      svgName?: string,
+    ): Promise<MatcherResult>
+  }
+}

tests/generate-board-outline-gerber.test.ts

@@ -1,10 +1,11 @@
-import { test } from "bun:test"
+import { test, expect } from "bun:test"
 import { convertSoupToGerberCommands } from "src/convert-soup-to-gerber-commands"
 import {
   stringifyGerberCommandLayers,
   stringifyGerberCommands,
 } from "src/stringify-gerber"
 import { maybeOutputGerber } from "tests/fixtures/maybe-output-gerber"
+import gerberToSvg from "gerber-to-svg"
 
 // If you're trying to test this, I would recommend opening up Kicad's Gerber
 // Viewer and loading in the files from the generated directory "gerber-output"
@@ -27,5 +28,15 @@ test("Generate simple gerber with a single trace", async () => {
 
   // TODO parse gerber to check for correctness
 
-  await maybeOutputGerber(stringifyGerberCommandLayers(gerber_cmds))
+  const gerberOutput = stringifyGerberCommandLayers(gerber_cmds)
+
+  await maybeOutputGerber(gerberOutput)
+
+  expect(gerberOutput).toMatchGerberSnapshot(import.meta.path, "simple1")
+
+  // gerberToSvg(gerberOutput.Edge_Cuts, {}, (err, svg) => {
+  //   expect(svg).toMatchSvgSnapshot(import.meta.path, "gerber-edge-cuts")
+  // })
+
+  // render(
 })