From 06d866004e11ec00a3ea5fc60fb118856ba0a8fa Mon Sep 17 00:00:00 2001
From: Luigi Pinca <luigipinca@gmail.com>
Date: Sun, 19 Apr 2020 08:55:54 +0200
Subject: [PATCH] Revert "[minor] Throw an error on invalid usage"

This reverts commit 364126620bf3fe4e6e0042d3b74ec53b5ccbbb08.
---
 lib/websocket-server.js       | 11 -----------
 test/websocket-server.test.js | 31 +++++++------------------------
 2 files changed, 7 insertions(+), 35 deletions(-)

diff --git a/lib/websocket-server.js b/lib/websocket-server.js
index 882c19486..e3701a040 100644
--- a/lib/websocket-server.js
+++ b/lib/websocket-server.js
@@ -10,7 +10,6 @@ const { format, parse } = require('./extension');
 const { GUID } = require('./constants');
 
 const keyRegex = /^[+/0-9A-Za-z]{22}==$/;
-const kUsedByWebSocketServer = Symbol('kUsedByWebSocketServer');
 
 /**
  * Class representing a WebSocket server.
@@ -83,14 +82,6 @@ class WebSocketServer extends EventEmitter {
     }
 
     if (this._server) {
-      if (this._server[kUsedByWebSocketServer]) {
-        throw new Error(
-          'The HTTP/S server is already being used by another WebSocket server'
-        );
-      } else {
-        this._server[kUsedByWebSocketServer] = true;
-      }
-
       this._removeListeners = addListeners(this._server, {
         listening: this.emit.bind(this, 'listening'),
         error: this.emit.bind(this, 'error'),
@@ -144,8 +135,6 @@ class WebSocketServer extends EventEmitter {
     const server = this._server;
 
     if (server) {
-      server[kUsedByWebSocketServer] = false;
-
       this._removeListeners();
       this._removeListeners = this._server = null;
 
diff --git a/test/websocket-server.test.js b/test/websocket-server.test.js
index 7503010a2..e862b61d9 100644
--- a/test/websocket-server.test.js
+++ b/test/websocket-server.test.js
@@ -18,22 +18,11 @@ describe('WebSocketServer', () => {
       assert.throws(() => new WebSocket.Server());
     });
 
-    describe('options', () => {
-      it('throws an error if no `port` or `server` option is specified', () => {
-        assert.throws(() => new WebSocket.Server({}));
-      });
-
-      it('throws an error if the server is already being used', () => {
-        const server = http.createServer();
-
-        new WebSocket.Server({ server });
-
-        assert.throws(
-          () => new WebSocket.Server({ server }),
-          /^Error: The HTTP\/S server is already being used by another WebSocket server$/
-        );
-      });
+    it('throws an error if no port or server is specified', () => {
+      assert.throws(() => new WebSocket.Server({}));
+    });
 
+    describe('options', () => {
       it('exposes options passed to constructor', (done) => {
         const wss = new WebSocket.Server({ port: 0 }, () => {
           assert.strictEqual(wss.options.port, 0);
@@ -237,21 +226,15 @@ describe('WebSocketServer', () => {
 
     it('cleans event handlers on precreated server', (done) => {
       const server = http.createServer();
-      const wss1 = new WebSocket.Server({ server });
+      const wss = new WebSocket.Server({ server });
 
       server.listen(0, () => {
-        wss1.close(() => {
+        wss.close(() => {
           assert.strictEqual(server.listenerCount('listening'), 0);
           assert.strictEqual(server.listenerCount('upgrade'), 0);
           assert.strictEqual(server.listenerCount('error'), 0);
 
-          // Check that no error is thrown if `server` is resued now as there
-          // are no other `WebSocketServer`s using it.
-          const wss2 = new WebSocket.Server({ server });
-
-          wss2.close(() => {
-            server.close(done);
-          });
+          server.close(done);
         });
       });
     });