Check sender of ENTER presence message in space.enter()

It shouldn’t return as a result of somebody else entering the space.

I’m not sure whether this is the best way of predicating whether or not
to return — perhaps checking for some unique ID on the received ENTER
presence message would be better. But it seems like an OK low-thought
solution at least for the time being.

src/Space.test.ts

@@ -63,7 +63,9 @@ describe('Space', () => {
     beforeEach<SpaceTestContext>(({ presence }) => {
       vi.spyOn(presence, 'subscribe').mockImplementation(
         async (_, listener?: (presenceMessage: Types.PresenceMessage) => void) => {
-          listener!(createPresenceMessage('enter' /* arbitrarily chosen */));
+          listener!(
+            createPresenceMessage('enter' /* arbitrarily chosen */, { clientId: 'MOCK_CLIENT_ID', connectionId: '1' }),
+          );
         },
       );
     });

src/Space.ts

@@ -244,7 +244,16 @@ class Space extends EventEmitter<SpaceEventMap> {
     return new Promise((resolve) => {
       const presence = this.channel.presence;
 
-      const presenceListener = async () => {
+      const presenceListener = async (presenceMessage: Types.PresenceMessage) => {
+        if (
+          !(
+            presenceMessage.clientId == this.client.auth.clientId &&
+            presenceMessage.connectionId == this.client.connection.id
+          )
+        ) {
+          return;
+        }
+
         presence.unsubscribe(presenceListener);
 
         const presenceMessages = await presence.get();