fix: serve handler error with 0 arguments

ext/http/00_serve.ts

@@ -793,9 +793,9 @@ internals.serveHttpOnConnection = serveHttpOnConnection;
 
 function registerDeclarativeServer(exports) {
  if (ObjectHasOwn(exports, "fetch")) {
- if (typeof exports.fetch !== "function" || exports.fetch.length !== 1) {
+ if (typeof exports.fetch !== "function") {
  throw new TypeError(
- "Invalid type for fetch: must be a function with a single parameter",
+ "Invalid type for fetch: must be a function with a single or no parameter",
  );
  }
  return ({ servePort, serveHost }) => {

tests/specs/serve/no_args/__test__.jsonc

@@ -0,0 +1,5 @@
+{
+ "args": "serve --port 12345 main.ts",
+ "output": "main.out",
+ "tempDir": true
+}

tests/specs/serve/no_args/main.out

@@ -0,0 +1 @@
+deno serve: Listening on http://localhost:12345/

tests/specs/serve/no_args/main.ts

@@ -0,0 +1,18 @@
+(async () => {
+ for (let i = 0; i < 1000; i++) {
+ try {
+ const resp = await fetch("http://localhost:12345/");
+ Deno.exit(0);
+ } catch {
+ await new Promise((r) => setTimeout(r, 10));
+ }
+ }
+
+ Deno.exit(2);
+})();
+
+export default {
+ fetch() {
+ return new Response("Hello world!");
+ },
+};