package app

import "testing"

func TestHubTracksOnlineAcrossMultipleDevices(t *testing.T) {
	hub := NewHub()
	first := &wsClient{userID: 7}
	second := &wsClient{userID: 7}
	if !hub.add(first) || !hub.online(7) {
		t.Fatal("first socket must make the user online")
	}
	if hub.add(second) {
		t.Fatal("a second device must not emit a duplicate online transition")
	}
	if hub.remove(first) || !hub.online(7) {
		t.Fatal("one remaining device must keep the user online")
	}
	if !hub.remove(second) || hub.online(7) {
		t.Fatal("the final socket must make the user offline")
	}
	if hub.remove(second) {
		t.Fatal("a late duplicate close must not emit another transition")
	}
}