간단한 테스트 로직 작성

 {
   "dependencies": {
+    "@types/chai": "^4.2.18",
     "@types/express": "^4.17.11",
+    "@types/mocha": "^8.2.2",
     "@types/node": "^15.3.1",
     "@types/socket.io": "^3.0.2",
+    "@types/socket.io-client": "^3.0.0",
     "@types/uuid": "^8.3.0",
+    "chai": "^4.3.4",
     "express": "^4.17.1",
+    "mocha": "^8.4.0",
     "nodemon": "^2.0.7",
     "socket.io": "^4.1.2",
+    "socket.io-client": "^4.1.2",
     "ts-node": "^9.1.1",
     "typescript": "^4.2.4",
     "uuid": "^8.3.2"
   },
   "scripts": {
-    "start": "nodemon index.ts"
+    "start": "nodemon index.ts",
+    "test": "mocha -r ts-node/register ./**/*.test.ts"
   }
 }

+import ioclient, { Socket } from "socket.io-client";
+import { MessageResponse, MessageType } from "./message/types";
+import { expect } from "chai";
+import { Server } from "./Server";
+
+describe("server", () => {
+  const PORT = 3000;
+
+  var server: Server;
+  var client: Socket;
+
+  before((done) => {
+    client = ioclient(`http://localhost:${PORT}`);
+    client.on("connect", done);
+
+    server = new Server(3000);
+  });
+
+  after(() => {
+    server.close();
+    client.close();
+  });
+
+  it("login", (done) => {
+    client.emit(
+      MessageType.LOGIN,
+      { username: "guest" },
+      (response: MessageResponse) => {
+        expect(response.ok).to.equals(true);
+        done();
+      }
+    );
+  });
+});