added files

test/index.spec.js

@@ -0,0 +1,20 @@
+import { env, createExecutionContext, waitOnExecutionContext, SELF } from 'cloudflare:test';
+import { describe, it, expect } from 'vitest';
+import worker from '../src';
+
+describe('Hello World worker', () => {
+	it('responds with Hello World! (unit style)', async () => {
+		const request = new Request('http://example.com');
+		// Create an empty context to pass to `worker.fetch()`.
+		const ctx = createExecutionContext();
+		const response = await worker.fetch(request, env, ctx);
+		// Wait for all `Promise`s passed to `ctx.waitUntil()` to settle before running test assertions
+		await waitOnExecutionContext(ctx);
+		expect(await response.text()).toMatchInlineSnapshot(`"Hello World!"`);
+	});
+
+	it('responds with Hello World! (integration style)', async () => {
+		const response = await SELF.fetch(request, env, ctx);
+		expect(await response.text()).toMatchInlineSnapshot(`"Hello World!"`);
+	});
+});