test(worker): add vitest harness

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

worker/package.json

@@ -6,7 +6,9 @@
   "scripts": {
     "build": "tsc",
     "start": "node dist/index.js",
-    "dev": "tsx watch src/index.ts"
+    "dev": "tsx watch src/index.ts",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "dependencies": {
     "@prisma/adapter-pg": "^7.4.0",
@@ -23,6 +25,7 @@
     "@types/yauzl": "^2.10.3",
     "prisma": "^7.4.0",
     "tsx": "^4.21.0",
-    "typescript": "^5"
+    "typescript": "^5",
+    "vitest": "^3.2.4"
   }
 }

worker/src/archive/fingerprint.test.ts

@@ -0,0 +1,7 @@
+import { describe, it, expect } from "vitest";
+
+describe("harness", () => {
+  it("runs", () => {
+    expect(1 + 1).toBe(2);
+  });
+});

worker/vitest.config.ts

@@ -0,0 +1,8 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    environment: "node",
+    include: ["src/**/*.test.ts"],
+  },
+});