Add simple test to Workers AI binding

fixtures/ai-app/.gitignore

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+dist

fixtures/ai-app/package.json

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+{
+	"name": "ai-app",
+	"version": "1.0.1",
+	"private": true,
+	"description": "",
+	"license": "ISC",
+	"author": "",
+	"main": "src/index.js",
+	"scripts": {
+		"check:type": "tsc",
+		"test": "vitest run",
+		"test:watch": "vitest",
+		"type:tests": "tsc -p ./tests/tsconfig.json"
+	},
+	"devDependencies": {
+		"wrangler": "workspace:*",
+		"@cloudflare/workers-tsconfig": "workspace:^"
+	},
+	"dependencies": {
+		"@cloudflare/ai": "^1.0.35"
+	}
+}

fixtures/ai-app/src/index.js

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+console.log("startup log");
+
+export default {
+	async fetch(request, env) {
+		console.log("request log");
+
+		return Response.json({
+			binding: env.AI,
+			fetcher: env.AI.fetch.toString(),
+		});
+	},
+};

fixtures/ai-app/tests/index.test.ts

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+import { resolve } from "path";
+import { fetch } from "undici";
+import { describe, it, beforeAll, afterAll } from "vitest";
+import { runWranglerDev } from "../../shared/src/run-wrangler-long-lived";
+
+describe("'wrangler dev' correctly renders pages", () => {
+	let ip: string,
+		port: number,
+		stop: (() => Promise<unknown>) | undefined,
+		getOutput: () => string;
+
+	beforeAll(async () => {
+		({ ip, port, stop, getOutput } = await runWranglerDev(
+			resolve(__dirname, ".."),
+			["--local", "--port=0", "--inspector-port=0"]
+		));
+	});
+
+	afterAll(async () => {
+		await stop?.();
+	});
+
+	it("ai binding is defined ", async ({ expect }) => {
+		const response = await fetch(`http://${ip}:${port}/`);
+		const content = await response.json();
+		expect(content).toEqual({
+			binding: {},
+			fetcher: "function fetch() { [native code] }",
+		});
+	});
+});

fixtures/ai-app/tests/tsconfig.json

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+{
+	"extends": "@cloudflare/workers-tsconfig/tsconfig.json",
+	"compilerOptions": {
+		"types": ["node"]
+	},
+	"include": ["**/*.ts", "../../../node-types.d.ts"]
+}

fixtures/ai-app/tsconfig.json

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+{
+	"compilerOptions": {
+		"target": "ES2020",
+		"esModuleInterop": true,
+		"module": "CommonJS",
+		"lib": ["ES2020"],
+		"types": ["node"],
+		"skipLibCheck": true,
+		"moduleResolution": "node",
+		"noEmit": true
+	},
+	"include": ["tests", "../../node-types.d.ts"]
+}

fixtures/ai-app/vitest.config.ts

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+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+	test: {
+		testTimeout: 10_000,
+		hookTimeout: 10_000,
+		teardownTimeout: 10_000,
+		useAtomics: true,
+	},
+});

fixtures/ai-app/wrangler.toml

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+name = "ai-app"
+compatibility_date = "2023-11-21"
+
+main = "src/index.js"
+
+[ai]
+binding = "AI"