func TestNewGroupAndJoin(t *testing.T) {
	group := NewGroup()
	member1 := group.Join()
	member2 := group.Join()
	if member1.group != member2.group {
		t.Fatal("group for these members must be same")
	}
}
Create new broadcast group.
Join two members.
package bcast
import (
	"gopkg.in/fatih/set.v0"
	"testing"
	"time"
)