Improve types (#25654)

types/stompjs/index.d.ts

@@ -1,6 +1,7 @@
 // Type definitions for stompjs 2.3
 // Project: https://github.com/jmesnil/stomp-websocket
-// Definitions by: Jimi Charalampidis <https://github.com/jimic>, Stefan Erichsen <https://github.com/Dr4k4n>
+// Definitions by: Jimi Charalampidis <https://github.com/jimic>
+//                 Stefan Erichsen <https://github.com/Dr4k4n>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /// <reference types="node" />
@@ -9,7 +10,7 @@ export const VERSIONS: {
     V1_0: string,
     V1_1: string,
     V1_2: string,
-    supportedVersions: () => Array<string>
+    supportedVersions: () => string[]
 };
 
 export class Client {
@@ -31,8 +32,8 @@ export class Client {
     disconnect(disconnectCallback: () => any, headers?: {}): any;
 
     send(destination: string, headers?: {}, body?: string): any;
-    subscribe(destination: string, callback?: (message: Message) => any, headers?: {}): any;
-    unsubscribe(id: string): any;
+    subscribe(destination: string, callback?: (message: Message) => any, headers?: {}): Subscription;
+    unsubscribe(id: string): void;
 
     begin(transaction: string): any;
     commit(transaction: string): any;
@@ -42,23 +43,22 @@ export class Client {
     nack(messageID: string, subscription: string, headers?: {}): any;
 }
 
-export interface Message {
-    command: string;
-    headers: {};
-    body: string;
+export interface Subscription {
+    id: string;
+    unsubscribe(): void;
+}
 
+export interface Message extends Frame {
     ack(headers?: {}): any;
     nack(headers?: {}): any;
 }
 
-export class Frame implements Message {
+export class Frame {
     command: string;
     headers: {};
     body: string;
     constructor(command: string, headers?: {}, body?: string);
 
-    ack(headers?: {}): any;
-    nack(headers?: {}): any;
     toString(): string;
     static sizeOfUTF8(s: string): number;
     static unmarshall(datas: any): any;

types/stompjs/stompjs-tests.ts

@@ -61,10 +61,11 @@ client.send('destination');
 client.send('destination', {});
 client.send('destination', {}, 'body');
 
-client.subscribe('destination', (message) => { });
-client.subscribe('destination', (message) => { }, {});
+let subscription = client.subscribe('destination', (message) => { });
+subscription = client.subscribe('destination', (message) => { }, {});
+subscription.unsubscribe();
 
-client.unsubscribe('id');
+client.unsubscribe(subscription.id);
 
 client.begin('transaction');