test: add basic test

extensions/checkout-ui/__tests__/Checkout.test.jsx

@@ -0,0 +1,11 @@
+import { mount } from '@remote-ui/testing'
+import { createRoot } from '@remote-ui/react'
+import Checkout from '../src/Checkout'
+
+describe('Header', () => {
+	it('renders the header', () => {
+		const app = mount((root) => {
+			createRoot(root).render(<Checkout />)
+		})
+	})
+})

extensions/checkout-ui/babel.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+    presets: [
+      '@babel/preset-env',
+      ['@babel/preset-react', {runtime: 'automatic'}],
+      "@babel/preset-typescript",
+    ],
+  };

extensions/checkout-ui/package.json

@@ -3,13 +3,24 @@
   "private": true,
   "version": "1.0.0",
   "license": "UNLICENSED",
+  "scripts": {
+    "test": "jest"
+  },
   "dependencies": {
-    "react": "^18.0.0",
     "@shopify/ui-extensions": "2024.7.x",
-    "@shopify/ui-extensions-react": "2024.7.x"
+    "@shopify/ui-extensions-react": "2024.7.x",
+    "react": "^18.0.0"
   },
   "devDependencies": {
+    "@babel/preset-env": "^7.24.8",
+    "@babel/preset-react": "^7.24.7",
+    "@babel/preset-typescript": "^7.24.7",
+    "@remote-ui/testing": "^1.4.3",
+    "@types/jest": "^29.5.12",
     "@types/react": "^18.0.0",
-    "react-reconciler": "0.29.0"
+    "babel-jest": "^29.7.0",
+    "jest": "^29.7.0",
+    "react-reconciler": "0.29.0",
+    "react-test-renderer": "^18.3.1"
   }
-}
+}