Add a very simple http server test

integration/bunjs-only-snippets/serve.test.ts

@@ -0,0 +1,54 @@
+import { file, serve } from "bun";
+import { expect, it } from "bun:test";
+import { readFileSync } from "fs";
+import { resolve } from "path";
+
+var port = 60000;
+
+it("should work for a hello world", async () => {
+  const server = serve({
+    port: port++,
+    fetch(req) {
+      return new Response(`Hello, world!`);
+    },
+  });
+  const response = await fetch(`http://localhost:${server.port}`);
+  expect(await response.text()).toBe("Hello, world!");
+  server.stop();
+});
+
+it("should work for a file", async () => {
+  const fixture = resolve(import.meta.dir, "./fetch.js.txt");
+  const textToExpect = readFileSync(fixture, "utf-8");
+
+  const server = serve({
+    port: port++,
+    fetch(req) {
+      return new Response(file(fixture));
+    },
+  });
+  const response = await fetch(`http://localhost:${server.port}`);
+  expect(await response.text()).toBe(textToExpect);
+  server.stop();
+});
+
+// var count = 200;
+// it(`should work for a file ${count} times`, async () => {
+//   const fixture = resolve(import.meta.dir, "./fetch.js.txt");
+//   const textToExpect = readFileSync(fixture, "utf-8");
+//   var ran = 0;
+//   const server = serve({
+//     port: port++,
+//     async fetch(req) {
+//       console.log(`Ran ${ran++}`);
+//       return new Response(file(fixture));
+//     },
+//   });
+
+//   for (let i = 0; i < count; i++) {
+//     const response = await fetch(`http://localhost:${server.port}`);
+//     expect(await response.text()).toBe(textToExpect);
+//   }
+
+//   server.stop();
+// });