// TestProposeAfterRemoveLeader ensures that we gracefully handle
// proposals that are attempted after a leader has been removed from
// the active configuration, but before that leader has called
// MultiNode.RemoveGroup.
func TestProposeAfterRemoveLeader(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
mn := newMultiNode(1)
go mn.run()
defer mn.Stop()
storage := NewMemoryStorage()
if err := mn.CreateGroup(1, newTestConfig(1, nil, 10, 1, storage),
[]Peer{{ID: 1}}); err != nil {
t.Fatal(err)
}
if err := mn.Campaign(ctx, 1); err != nil {
t.Fatal(err)
}
if err := mn.ProposeConfChange(ctx, 1, raftpb.ConfChange{
Type: raftpb.ConfChangeRemoveNode,
NodeID: 1,
}); err != nil {
t.Fatal(err)
}
gs := <-mn.Ready()
g := gs[1]
if err := storage.Append(g.Entries); err != nil {
t.Fatal(err)
}
for _, e := range g.CommittedEntries {
if e.Type == raftpb.EntryConfChange {
var cc raftpb.ConfChange
if err := cc.Unmarshal(e.Data); err != nil {
t.Fatal(err)
}
mn.ApplyConfChange(1, cc)
}
}
mn.Advance(gs)
if err := mn.Propose(ctx, 1, []byte("somedata")); err != nil {
t.Errorf("err = %v, want nil", err)
}
}
