72 lines
1.8 KiB
TypeScript
72 lines
1.8 KiB
TypeScript
/// <reference lib="deno.ns" />
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import { assertEquals } from "jsr:@std/assert";
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const url = "ws://0.0.0.0:6969";
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function connect(url: string): Promise<WebSocket> {
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return new Promise((resolve, reject) => {
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const socket = new WebSocket(url);
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socket.onopen = () => resolve(socket);
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socket.onerror = (e) => reject(e);
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});
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}
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function nextMessage(socket: WebSocket): Promise<unknown> {
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return new Promise((resolve, reject) => {
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const onMessage = (e: MessageEvent) => {
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socket.removeEventListener("message", onMessage);
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try {
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resolve(JSON.parse(e.data));
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} catch {
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resolve(e.data);
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}
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};
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socket.addEventListener("message", onMessage);
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socket.addEventListener("error", reject, { once: true });
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});
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}
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function close(socket: WebSocket): Promise<void> {
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return new Promise((resolve) => {
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if (socket.readyState === WebSocket.CLOSED) {
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return resolve();
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}
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socket.onclose = () => resolve();
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socket.close();
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});
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}
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Deno.test("broadcasts a message on connect to all clients", async () => {
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const s1 = await connect(url);
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const s2 = await connect(url);
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assertEquals(await nextMessage(s1), "2 has joined!");
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const s3 = connect(url);
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Promise.all([nextMessage(s1), nextMessage(s2)]).then((messages) => {
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messages.forEach((message) => {
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assertEquals(message, "3 has joined!");
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});
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});
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await close(s1);
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await close(s2);
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await close(await s3);
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});
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Deno.test("removes a client from broadcast after it disconnects", async () => {
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const s4 = await connect(url);
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const s5 = await connect(url);
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const s6 = await connect(url);
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await close(s5);
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Promise.all([nextMessage(s4), nextMessage(s6)]).then((messages) => {
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messages.forEach((message) => {
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assertEquals(message, "5 has left!");
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});
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});
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await close(s4);
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await close(s6);
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});
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