func assertNextOp(c *gc.C, s *timequeue.Queue, clock *coretesting.Clock, d time.Duration) {
next := s.Next()
c.Assert(next, gc.NotNil)
if d > 0 {
select {
case <-next:
c.Fatal("Next channel signalled too soon")
default:
}
}
// temporarily move time forward
clock.Advance(d)
defer clock.Advance(-d)
select {
case _, ok := <-next:
c.Assert(ok, jc.IsTrue)
// the time value is unimportant to us
default:
c.Fatal("Next channel not signalled")
}
}
func assertReady(c *gc.C, s *timequeue.Queue, clock *coretesting.Clock, expect ...interface{}) {
ready := s.Ready(clock.Now())
c.Assert(ready, jc.DeepEquals, expect)
}