Using Cloudflare Workers

test/env.d.ts

@@ -0,0 +1,3 @@
+declare module "cloudflare:test" {
+    interface ProvidedEnv extends Env {}
+}

test/index.spec.ts

@@ -0,0 +1,24 @@
+import { env, createExecutionContext, waitOnExecutionContext, SELF } from "cloudflare:test";
+import { describe, it, expect } from "vitest";
+import worker from "../src/index";
+
+// For now, you'll need to do something like this to get a correctly-typed
+// `Request` to pass to `worker.fetch()`.
+const IncomingRequest = Request<unknown, IncomingRequestCfProperties>;
+
+describe("Hello World worker", () => {
+    it("responds with Hello World! (unit style)", async () => {
+        const request = new IncomingRequest("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("https://example.com");
+        expect(await response.text()).toMatchInlineSnapshot(`"Hello World!"`);
+    });
+});

test/tsconfig.json

@@ -0,0 +1,8 @@
+{
+    "extends": "../tsconfig.json",
+    "compilerOptions": {
+        "types": ["@cloudflare/vitest-pool-workers"]
+    },
+    "include": ["./**/*.ts", "../worker-configuration.d.ts"],
+    "exclude": []
+}