func (s *HostSuite) TestUpdateTags(t *c.C) {
events := make(chan *discoverd.Event)
stream, err := s.discoverdClient(t).Service("flynn-host").Watch(events)
t.Assert(err, c.IsNil)
defer stream.Close()
nextEvent := func() *discoverd.Event {
select {
case e, ok := <-events:
if !ok {
t.Fatal("unexpected close of discoverd stream")
}
return e
case <-time.After(10 * time.Second):
t.Fatal("timed out waiting for discoverd event")
}
return nil
}
var client *cluster.Host
for {
e := nextEvent()
if e.Kind == discoverd.EventKindUp && client == nil {
client = cluster.NewHost(e.Instance.Meta["id"], e.Instance.Addr, nil, nil)
}
if e.Kind == discoverd.EventKindCurrent {
break
}
}
if client == nil {
t.Fatal("did not initialize flynn-host client")
}
t.Assert(client.UpdateTags(map[string]string{"foo": "bar"}), c.IsNil)
var meta map[string]string
for {
e := nextEvent()
if e.Kind == discoverd.EventKindUpdate && e.Instance.Meta["id"] == client.ID() {
meta = e.Instance.Meta
break
}
}
t.Assert(meta["tag:foo"], c.Equals, "bar")
// setting to empty string should delete the tag
t.Assert(client.UpdateTags(map[string]string{"foo": ""}), c.IsNil)
for {
e := nextEvent()
if e.Kind == discoverd.EventKindUpdate && e.Instance.Meta["id"] == client.ID() {
meta = e.Instance.Meta
break
}
}
if _, ok := meta["tag:foo"]; ok {
t.Fatal("expected tag to be deleted but is still present")
}
}