feat(message-core): unsusbscribeAll fn

Author: Kasey Powers

packages/message-core/README.md

@@ -16,7 +16,11 @@ it returns a function that can be used to unsubscribe from that event
 
 ### unsubscribe
 
-`avMessage.unsubscribe(eventName)` will remove all listeners for this event
+`avMessage.unsubscribe(eventName)` will remove all listeners for this event.
+
+### unsubscribeAll
+
+`avMessage.unsubscribeAll()` will remove all listeners for all events.
 
 ### enabled
 

packages/message-core/src/index.js

@@ -66,6 +66,10 @@ class AvMessage {
     delete this.subscribers[event];
   }
 
+  unsubscribeAll() {
+    this.subscribers = {};
+  }
+
   onMessage(event, data) {
     if (this.subscribers[event]) {
       this.subscribers[event].forEach(fn => {

packages/message-core/src/tests/message.test.js

@@ -68,6 +68,11 @@ describe('AvMessage', () => {
       expect(avMessage.subscribers).toEqual({
         [testEvent]: [fn2],
       });
+
+      unsubscribe();
+      expect(avMessage.subscribers).toEqual({
+        [testEvent]: [fn2],
+      });
     });
 
     test('unsusbscribe should remove subscriptions for event', () => {
@@ -80,6 +85,18 @@ describe('AvMessage', () => {
 
       avMessage.unsubscribe('event1');
       expect(avMessage.subscribers).toEqual({ event2 });
+
+      avMessage.unsubscribe();
+      expect(avMessage.subscribers).toEqual({ event2 });
+    });
+
+    test('unsubscribeAll should remove all subscriptions', () => {
+      avMessage.subscribers = {
+        test1: ['a', 'b'],
+        test2: ['b', 'c'],
+      };
+      avMessage.unsubscribeAll();
+      expect(avMessage.subscribers).toEqual({});
     });
   });