Manager flaky test

pkg/manager/manager.go

@@ -126,7 +126,11 @@ func (m *manager) Start() (<-chan struct{}, error) {
 				log.Infoln("Manager stopped.")
 				return
 
-			case leader := <-notify:
+			case leader, open := <-notify:
+
+				if !open {
+					return
+				}
 
 				// This channel has data only when there's been a leadership change.
 
@@ -150,11 +154,17 @@ func (m *manager) Start() (<-chan struct{}, error) {
 			case <-m.stop:
 
 				log.Infoln("Stopping..")
+				m.stop = nil
 				close(stopWorkQueue)
 				close(notify)
 				return
 
-			case evt := <-leaderChan:
+			case evt, open := <-leaderChan:
+
+				if !open {
+					return
+				}
+
 				// This here handles possible duplicated events about leadership and fires only when there
 				// is a change.
 
@@ -198,8 +208,8 @@ func (m *manager) Stop() {
 	if m.stop == nil {
 		return
 	}
-	m.leader.Stop()
 	close(m.stop)
+	m.leader.Stop()
 }
 
 func (m *manager) getCurrentState() (GlobalSpec, error) {

pkg/manager/manager_test.go

@@ -121,6 +121,12 @@ func testToStruct(m *json.RawMessage) interface{} {
 	return &o
 }
 
+func testCloseAll(c []chan string) {
+	for _, cc := range c {
+		close(cc)
+	}
+}
+
 func TestNoCallsToGroupWhenNoLeader(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
@@ -145,11 +151,15 @@ func TestNoCallsToGroupWhenNoLeader(t *testing.T) {
 	manager1.Start()
 	manager2.Start()
 
+	testSetLeader(t, leaderChans, "nobody")
+
 	manager1.Stop()
 	manager2.Stop()
 
 	stoppable1.Stop()
 	stoppable2.Stop()
+
+	testCloseAll(leaderChans)
 }
 
 func TestStartOneLeader(t *testing.T) {
@@ -209,6 +219,7 @@ func TestStartOneLeader(t *testing.T) {
 	stoppable1.Stop()
 	stoppable2.Stop()
 
+	testCloseAll(leaderChans)
 }
 
 func TestChangeLeadership(t *testing.T) {
@@ -306,4 +317,6 @@ func TestChangeLeadership(t *testing.T) {
 
 	stoppable1.Stop()
 	stoppable2.Stop()
+
+	testCloseAll(leaderChans)
 }