Add test for wrong password

test/command_pass.js

@@ -29,6 +29,29 @@ describe("PASS OK", function () {
         user = server.getUserlist()["some_nick"]
         assert.equal(user["registered"], true)
         done()
+    })
+
+    it("should end connection on wrong password", function (done) {
+        const server = IRCServer.create({
+          password: "itsJustATest"
+        })
+        let mockedSock = new EventEmitter()
+
+        mockedSock.address = function() {
+          return { port: 12346, family: 'IPv4', address: '127.0.0.1' }
+        }
+
+        mockedSock.write = function (data) {
+            return
+        }
+
+        mockedSock.destroy = function () {
+            // connection has to be destroyed
+            done("")
+        }
+
+        server.emit("connection", mockedSock)
+        mockedSock.emit('data', Buffer.from("PASS wrongpassword\r\n", "ascii"))
 
     })
 })