address PR comments

node/node.go

@@ -461,18 +461,16 @@ func (n *Node) initKeystoreAPI() error {
 // initMetricsAPI initializes the Metrics API
 // Assumes n.APIServer is already set
 func (n *Node) initMetricsAPI() error {
-	n.Log.Info("initializing metrics")
 	registry, handler := metrics.NewService()
-	if n.Config.MetricsAPIEnabled {
-		n.Log.Info("initializing metrics API")
-		if err := n.APIServer.AddRoute(handler, &sync.RWMutex{}, "metrics", "", n.HTTPLog); err != nil {
-			return err
-		}
-	} else {
-		n.Log.Info("skipping metrics API initialization because it has been disabled")
-	}
+	// It is assumed by components of the system that the Metrics interface is
+	// non-nil. So, it is set regardless of if the metrics API is available or not.
 	n.Config.ConsensusParams.Metrics = registry
-	return nil
+	if !n.Config.MetricsAPIEnabled {
+		n.Log.Info("skipping metrics API initialization because it has been disabled")
+		return nil
+	}
+	n.Log.Info("initializing metrics API")
+	return n.APIServer.AddRoute(handler, &sync.RWMutex{}, "metrics", "", n.HTTPLog)
 }
 
 // initAdminAPI initializes the Admin API service
@@ -529,7 +527,7 @@ func (n *Node) initHealthAPI() error {
 		return nil, nil
 	}
 	// Passes if the P, X and C chains are finished bootstrapping
-	if err := service.RegisterMonotonicCheckFunc("defaultChainsBootstrapped", isBootstrappedFunc); err != nil {
+	if err := service.RegisterMonotonicCheckFunc("chains.default.bootstrapped", isBootstrappedFunc); err != nil {
 		return err
 	}
 	return n.APIServer.AddRoute(service.Handler(), &sync.RWMutex{}, "health", "", n.HTTPLog)

snow/engine/common/test_engine.go

@@ -15,7 +15,7 @@ import (
 type EngineTest struct {
 	T *testing.T
 
-	Bootstrapped,
+	CantIsBootstrapped,
 	CantStartup,
 	CantGossip,
 	CantShutdown,
@@ -44,6 +44,7 @@ type EngineTest struct {
 	CantQueryFailed,
 	CantChits bool
 
+	IsBootstrappedF                                    func() bool
 	ContextF                                           func() *snow.Context
 	StartupF, GossipF, ShutdownF                       func() error
 	NotifyF                                            func(Message) error
@@ -59,7 +60,7 @@ var _ Engine = &EngineTest{}
 
 // Default ...
 func (e *EngineTest) Default(cant bool) {
-	e.Bootstrapped = cant
+	e.CantIsBootstrapped = cant
 
 	e.CantStartup = cant
 	e.CantGossip = cant
@@ -360,5 +361,13 @@ func (e *EngineTest) Chits(validatorID ids.ShortID, requestID uint32, containerI
 
 // IsBootstrapped ...
 func (e *EngineTest) IsBootstrapped() bool {
-	return e.Bootstrapped
+	if e.IsBootstrappedF != nil {
+		return e.IsBootstrappedF()
+	} else if e.CantIsBootstrapped {
+		if e.T != nil {
+			e.T.Fatalf("Unexpectedly called IsBootstrapped")
+		}
+		panic("Unexpectedly called IsBootstrapped")
+	}
+	return e.IsBootstrappedF()
 }