add test and test workflow

.github/workflows/test.yml

···
+name: Testing
+
+on:
+    push:
+        branches:
+            - main
+    pull_request:
+        branches: ["main"]
+
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install PNPM
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          cache: "pnpm"
+      - name: Install dependencies
+        run: pnpm install
+      - name: Test
+        run: pnpm test

package.json

···
 	"scripts": {
 		"lint": "biome lint",
 		"format": "biome format --write ./src",
+		"test": "vitest --run",
 		"lex-gen": "lex gen-api ./src/leaflet/lexicons ./lexicons/pub/leaflet/* ./lexicons/pub/leaflet/*/* ./lexicons/com/atproto/*/* --yes",
 		"typecheck": "tsc --noEmit",
 		"build": "rm -rf dist && tsc"

src/tests/uri-to-rkey.test.ts

···
+import { expect, test } from "vitest";
+import { uriToRkey } from "../utils";
+
+test("should throw if invalid at uri is passed in", () => {
+	expect(() => uriToRkey("test")).toThrowError("get rkey");
+});
+
+test("should pass if valid at uri is passed in", () => {
+	expect(
+		uriToRkey(
+			"at://did:plc:qttsv4e7pu2jl3ilanfgc3zn/pub.leaflet.document/3lvl7m6jd4s2e",
+		),
+	).toBe("3lvl7m6jd4s2e");
+});

src/utils.ts

···
-import { UnicodeString } from "@atproto/api";
+import { AtUri, UnicodeString } from "@atproto/api";
 import sanitizeHTML from "sanitize-html";
 import {
 	PubLeafletBlocksHeader,
···
 } from "./types.js";
 
 export function uriToRkey(uri: string): string {
-	const rkey = uri.split("/").pop();
-	if (!rkey) {
+	const u = AtUri.make(uri);
+	if (!u.rkey) {
 		throw new Error("Failed to get rkey from uri.");
 	}
-	return rkey;
+	return u.rkey;
 }
 
 export async function resolveMiniDoc(handleOrDid: string) {

vitest.config.ts

···
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+	test: {
+		globals: true,
+		environment: "node",
+	},
+});