engine: GetSubsystemsStatus fix (thrasher-corp#773)

* engine: GetSubsystemsStatus fix

* engine: force map literal to stop doubling up on keys, expanded test coverage

* engine: Deploy default for migration requirement.

* glorious: nits addr

* glorious: suggestion

* tests: fix

communications/communications.go

@@ -15,13 +15,13 @@ type Communications struct {
 	base.IComm
 }
 
-// ErrNoCommunicationRelayersEnabled returns when no relayers enabled
-var ErrNoCommunicationRelayersEnabled = errors.New("no communication relayers enabled")
+// ErrNoRelayersEnabled returns when no communication relayers are enabled
+var ErrNoRelayersEnabled = errors.New("no communication relayers are enabled")
 
 // NewComm sets up and returns a pointer to a Communications object
 func NewComm(cfg *base.CommunicationsConfig) (*Communications, error) {
 	if !cfg.IsAnyEnabled() {
-		return nil, ErrNoCommunicationRelayersEnabled
+		return nil, ErrNoRelayersEnabled
 	}
 
 	var comm Communications

dispatch/dispatch.go

@@ -11,6 +11,9 @@ import (
 	"github.com/thrasher-corp/gocryptotrader/log"
 )
 
+// ErrNotRunning defines an error when the dispatcher is not running
+var ErrNotRunning = errors.New("dispatcher not running")
+
 // Name is an exported subsystem name
 const Name = "dispatch"
 
@@ -117,7 +120,7 @@ func (d *Dispatcher) start(workers, channelCapacity int) error {
 // stop stops the service and shuts down all worker routines
 func (d *Dispatcher) stop() error {
 	if !atomic.CompareAndSwapUint32(&d.running, 1, 0) {
-		return errors.New("dispatcher not running")
+		return ErrNotRunning
 	}
 	close(d.shutdown)
 	ch := make(chan struct{})

engine/communication_manager_test.go

@@ -16,8 +16,8 @@ func TestSetup(t *testing.T) {
 	}
 
 	_, err = SetupCommunicationManager(&base.CommunicationsConfig{})
-	if !errors.Is(err, communications.ErrNoCommunicationRelayersEnabled) {
-		t.Errorf("error '%v', expected '%v'", err, communications.ErrNoCommunicationRelayersEnabled)
+	if !errors.Is(err, communications.ErrNoRelayersEnabled) {
+		t.Errorf("error '%v', expected '%v'", err, communications.ErrNoRelayersEnabled)
 	}
 
 	m, err := SetupCommunicationManager(&base.CommunicationsConfig{

engine/connection_manager.go

@@ -1,6 +1,7 @@
 package engine
 
 import (
+	"errors"
 	"fmt"
 	"sync/atomic"
 
@@ -12,6 +13,8 @@ import (
 // ConnectionManagerName is an exported subsystem name
 const ConnectionManagerName = "internet_monitor"
 
+var errConnectionCheckerIsNil = errors.New("connection checker is nil")
+
 // connectionManager manages the connchecker
 type connectionManager struct {
 	started int32
@@ -72,14 +75,17 @@ func (m *connectionManager) Start() error {
 // Stop stops the connection manager
 func (m *connectionManager) Stop() error {
 	if m == nil {
-		return fmt.Errorf("connection manager %w", ErrNilSubsystem)
+		return fmt.Errorf("connection manager: %w", ErrNilSubsystem)
 	}
 	if atomic.LoadInt32(&m.started) == 0 {
-		return fmt.Errorf("connection manager %w", ErrSubSystemNotStarted)
+		return fmt.Errorf("connection manager: %w", ErrSubSystemNotStarted)
 	}
 	defer func() {
 		atomic.CompareAndSwapInt32(&m.started, 1, 0)
 	}()
+	if m.conn == nil {
+		return fmt.Errorf("connection manager: %w", errConnectionCheckerIsNil)
+	}
 	log.Debugln(log.ConnectionMgr, "Connection manager shutting down...")
 	m.conn.Shutdown()
 	log.Debugln(log.ConnectionMgr, "Connection manager stopped.")

engine/connection_manager_test.go

@@ -69,6 +69,10 @@ func TestConnectionMonitorStart(t *testing.T) {
 
 func TestConnectionMonitorStop(t *testing.T) {
 	t.Parallel()
+	err := (&connectionManager{started: 1}).Stop()
+	if !errors.Is(err, errConnectionCheckerIsNil) {
+		t.Errorf("error '%v', expected '%v'", err, errConnectionCheckerIsNil)
+	}
 	m, err := setupConnectionManager(&config.ConnectionMonitorConfig{})
 	if !errors.Is(err, nil) {
 		t.Errorf("error '%v', expected '%v'", err, nil)

engine/helpers.go

@@ -34,29 +34,31 @@ import (
 )
 
 var (
-	errCertExpired     = errors.New("gRPC TLS certificate has expired")
-	errCertDataIsNil   = errors.New("gRPC TLS certificate PEM data is nil")
-	errCertTypeInvalid = errors.New("gRPC TLS certificate type is invalid")
+	errCertExpired         = errors.New("gRPC TLS certificate has expired")
+	errCertDataIsNil       = errors.New("gRPC TLS certificate PEM data is nil")
+	errCertTypeInvalid     = errors.New("gRPC TLS certificate type is invalid")
+	errSubsystemNotFound   = errors.New("subsystem not found")
+	errGRPCManagementFault = errors.New("cannot manage GRPC subsystem via GRPC. Please manually change your config")
 )
 
 // GetSubsystemsStatus returns the status of various subsystems
 func (bot *Engine) GetSubsystemsStatus() map[string]bool {
-	systems := make(map[string]bool)
-	systems[SyncManagerName] = bot.CommunicationsManager.IsRunning()
-	systems[ConnectionManagerName] = bot.connectionManager.IsRunning()
-	systems[OrderManagerName] = bot.OrderManager.IsRunning()
-	systems[PortfolioManagerName] = bot.portfolioManager.IsRunning()
-	systems[NTPManagerName] = bot.ntpManager.IsRunning()
-	systems[DatabaseConnectionManagerName] = bot.DatabaseManager.IsRunning()
-	systems[SyncManagerName] = bot.Settings.EnableExchangeSyncManager
-	systems[grpcName] = bot.Settings.EnableGRPC
-	systems[grpcProxyName] = bot.Settings.EnableGRPCProxy
-	systems[vm.Name] = bot.gctScriptManager.IsRunning()
-	systems[DeprecatedName] = bot.Settings.EnableDeprecatedRPC
-	systems[WebsocketName] = bot.Settings.EnableWebsocketRPC
-	systems[dispatch.Name] = dispatch.IsRunning()
-	systems[dataHistoryManagerName] = bot.dataHistoryManager.IsRunning()
-	return systems
+	return map[string]bool{
+		CommunicationsManagerName:     bot.CommunicationsManager.IsRunning(),
+		ConnectionManagerName:         bot.connectionManager.IsRunning(),
+		OrderManagerName:              bot.OrderManager.IsRunning(),
+		PortfolioManagerName:          bot.portfolioManager.IsRunning(),
+		NTPManagerName:                bot.ntpManager.IsRunning(),
+		DatabaseConnectionManagerName: bot.DatabaseManager.IsRunning(),
+		SyncManagerName:               bot.Settings.EnableExchangeSyncManager,
+		grpcName:                      bot.Settings.EnableGRPC,
+		grpcProxyName:                 bot.Settings.EnableGRPCProxy,
+		vm.Name:                       bot.gctScriptManager.IsRunning(),
+		DeprecatedName:                bot.Settings.EnableDeprecatedRPC,
+		WebsocketName:                 bot.Settings.EnableWebsocketRPC,
+		dispatch.Name:                 dispatch.IsRunning(),
+		dataHistoryManagerName:        bot.dataHistoryManager.IsRunning(),
+	}
 }
 
 // RPCEndpoint stores an RPC endpoint status and addr
@@ -66,29 +68,40 @@ type RPCEndpoint struct {
 }
 
 // GetRPCEndpoints returns a list of RPC endpoints and their listen addrs
-func GetRPCEndpoints() map[string]RPCEndpoint {
-	endpoints := make(map[string]RPCEndpoint)
-	endpoints[grpcName] = RPCEndpoint{
-		Started:    Bot.Settings.EnableGRPC,
-		ListenAddr: "grpc://" + Bot.Config.RemoteControl.GRPC.ListenAddress,
-	}
-	endpoints[grpcProxyName] = RPCEndpoint{
-		Started:    Bot.Settings.EnableGRPCProxy,
-		ListenAddr: "http://" + Bot.Config.RemoteControl.GRPC.GRPCProxyListenAddress,
-	}
-	endpoints[DeprecatedName] = RPCEndpoint{
-		Started:    Bot.Settings.EnableDeprecatedRPC,
-		ListenAddr: "http://" + Bot.Config.RemoteControl.DeprecatedRPC.ListenAddress,
-	}
-	endpoints[WebsocketName] = RPCEndpoint{
-		Started:    Bot.Settings.EnableWebsocketRPC,
-		ListenAddr: "ws://" + Bot.Config.RemoteControl.WebsocketRPC.ListenAddress,
-	}
-	return endpoints
+func (bot *Engine) GetRPCEndpoints() (map[string]RPCEndpoint, error) {
+	if bot.Config == nil {
+		return nil, errNilConfig
+	}
+	return map[string]RPCEndpoint{
+		grpcName: {
+			Started:    bot.Settings.EnableGRPC,
+			ListenAddr: "grpc://" + bot.Config.RemoteControl.GRPC.ListenAddress,
+		},
+		grpcProxyName: {
+			Started:    bot.Settings.EnableGRPCProxy,
+			ListenAddr: "http://" + bot.Config.RemoteControl.GRPC.GRPCProxyListenAddress,
+		},
+		DeprecatedName: {
+			Started:    bot.Settings.EnableDeprecatedRPC,
+			ListenAddr: "http://" + bot.Config.RemoteControl.DeprecatedRPC.ListenAddress,
+		},
+		WebsocketName: {
+			Started:    bot.Settings.EnableWebsocketRPC,
+			ListenAddr: "ws://" + bot.Config.RemoteControl.WebsocketRPC.ListenAddress,
+		},
+	}, nil
 }
 
 // SetSubsystem enables or disables an engine subsystem
 func (bot *Engine) SetSubsystem(subSystemName string, enable bool) error {
+	if bot == nil {
+		return errNilBot
+	}
+
+	if bot.Config == nil {
+		return errNilConfig
+	}
+
 	var err error
 	switch strings.ToLower(subSystemName) {
 	case CommunicationsManagerName:
@@ -227,7 +240,7 @@ func (bot *Engine) SetSubsystem(subSystemName string, enable bool) error {
 		}
 		return bot.apiServer.StopWebsocketServer()
 	case grpcName, grpcProxyName:
-		return errors.New("cannot manage GRPC subsystem via GRPC. Please manually change your config")
+		return errGRPCManagementFault
 	case dataHistoryManagerName:
 		if enable {
 			if bot.dataHistoryManager == nil {
@@ -251,8 +264,7 @@ func (bot *Engine) SetSubsystem(subSystemName string, enable bool) error {
 		}
 		return bot.gctScriptManager.Stop()
 	}
-
-	return errors.New("subsystem not found")
+	return fmt.Errorf("%s: %w", subSystemName, errSubsystemNotFound)
 }
 
 // GetExchangeOTPs returns OTP codes for all exchanges which have a otpsecret

engine/helpers_test.go

@@ -18,13 +18,18 @@ import (
 	"github.com/thrasher-corp/gocryptotrader/common"
 	"github.com/thrasher-corp/gocryptotrader/common/convert"
 	"github.com/thrasher-corp/gocryptotrader/common/file"
+	"github.com/thrasher-corp/gocryptotrader/communications"
 	"github.com/thrasher-corp/gocryptotrader/config"
 	"github.com/thrasher-corp/gocryptotrader/currency"
+	"github.com/thrasher-corp/gocryptotrader/database"
+	"github.com/thrasher-corp/gocryptotrader/dispatch"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/account"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/asset"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/orderbook"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/stats"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/ticker"
+	"github.com/thrasher-corp/gocryptotrader/gctscript/vm"
+	"github.com/thrasher-corp/gocryptotrader/log"
 )
 
 var testExchange = "Bitstamp"
@@ -88,6 +93,147 @@ func CreateTestBot(t *testing.T) *Engine {
 	return bot
 }
 
+func TestGetSubsystemsStatus(t *testing.T) {
+	m := (&Engine{}).GetSubsystemsStatus()
+	if len(m) != 14 {
+		t.Fatalf("subsystem count is wrong expecting: %d but received: %d", 14, len(m))
+	}
+}
+
+func TestGetRPCEndpoints(t *testing.T) {
+	_, err := (&Engine{}).GetRPCEndpoints()
+	if !errors.Is(err, errNilConfig) {
+		t.Fatalf("received: %v, but expected: %v", err, errNilConfig)
+	}
+
+	m, err := (&Engine{Config: &config.Config{}}).GetRPCEndpoints()
+	if !errors.Is(err, nil) {
+		t.Fatalf("received: %v, but expected: %v", err, nil)
+	}
+	if len(m) != 4 {
+		t.Fatalf("expected length: %d but received: %d", 4, len(m))
+	}
+}
+
+func TestSetSubsystem(t *testing.T) {
+	testCases := []struct {
+		Subsystem    string
+		Engine       *Engine
+		EnableError  error
+		DisableError error
+	}{
+		{Subsystem: "sillyBilly", EnableError: errNilBot, DisableError: errNilBot},
+		{Subsystem: "sillyBilly", Engine: &Engine{}, EnableError: errNilConfig, DisableError: errNilConfig},
+		{Subsystem: "sillyBilly", Engine: &Engine{Config: &config.Config{}}, EnableError: errSubsystemNotFound, DisableError: errSubsystemNotFound},
+		{
+			Subsystem:    CommunicationsManagerName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  communications.ErrNoRelayersEnabled,
+			DisableError: ErrNilSubsystem,
+		},
+		{
+			Subsystem:    ConnectionManagerName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  nil,
+			DisableError: nil,
+		},
+		{
+			Subsystem:    OrderManagerName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  nil,
+			DisableError: nil,
+		},
+		{
+			Subsystem:    PortfolioManagerName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  errNilExchangeManager,
+			DisableError: ErrNilSubsystem,
+		},
+		{
+			Subsystem:    NTPManagerName,
+			Engine:       &Engine{Config: &config.Config{Logging: log.Config{Enabled: convert.BoolPtr(false)}}},
+			EnableError:  errNilNTPConfigValues,
+			DisableError: ErrNilSubsystem,
+		},
+		{
+			Subsystem:    DatabaseConnectionManagerName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  database.ErrDatabaseSupportDisabled,
+			DisableError: ErrSubSystemNotStarted,
+		},
+		{
+			Subsystem:    SyncManagerName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  errNoSyncItemsEnabled,
+			DisableError: ErrNilSubsystem,
+		},
+		{
+			Subsystem:    dispatch.Name,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  nil,
+			DisableError: nil,
+		},
+
+		{
+			Subsystem:    DeprecatedName,
+			Engine:       &Engine{Config: &config.Config{}, Settings: Settings{ConfigFile: config.DefaultFilePath()}},
+			EnableError:  errServerDisabled,
+			DisableError: ErrSubSystemNotStarted,
+		},
+		{
+			Subsystem:    WebsocketName,
+			Engine:       &Engine{Config: &config.Config{}, Settings: Settings{ConfigFile: config.DefaultFilePath()}},
+			EnableError:  errServerDisabled,
+			DisableError: ErrSubSystemNotStarted,
+		},
+		{
+			Subsystem:    grpcName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  errGRPCManagementFault,
+			DisableError: errGRPCManagementFault},
+		{
+			Subsystem:    grpcProxyName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  errGRPCManagementFault,
+			DisableError: errGRPCManagementFault},
+		{
+			Subsystem:    dataHistoryManagerName,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  database.ErrNilInstance,
+			DisableError: ErrNilSubsystem,
+		},
+		{
+			Subsystem:    vm.Name,
+			Engine:       &Engine{Config: &config.Config{}},
+			EnableError:  nil,
+			DisableError: nil,
+		},
+	}
+
+	for _, tt := range testCases {
+		tt := tt
+		t.Run(tt.Subsystem, func(t *testing.T) {
+			t.Parallel()
+			err := tt.Engine.SetSubsystem(tt.Subsystem, true)
+			if !errors.Is(err, tt.EnableError) {
+				t.Fatalf(
+					"while enabled %s subsystem received: %#v, but expected: %v",
+					tt.Subsystem,
+					err,
+					tt.EnableError)
+			}
+			err = tt.Engine.SetSubsystem(tt.Subsystem, false)
+			if !errors.Is(err, tt.DisableError) {
+				t.Fatalf(
+					"while disabling %s subsystem received: %#v, but expected: %v",
+					tt.Subsystem,
+					err,
+					tt.DisableError)
+			}
+		})
+	}
+}
+
 func TestGetExchangeOTPs(t *testing.T) {
 	t.Parallel()
 	bot := CreateTestBot(t)