E2E Tests for GameServer Player Tracking

Updated the udp-simple example to accept various player tracking
commands, and also implemented e2e tests to test it working on a
singular GameServer instance.

Work on #1507

examples/simple-udp/Makefile

@@ -27,7 +27,7 @@ REPOSITORY = gcr.io/agones-images
 
 mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
 project_path := $(dir $(mkfile_path))
-server_tag = $(REPOSITORY)/udp-server:0.19
+server_tag = $(REPOSITORY)/udp-server:0.20
 root_path = $(realpath $(project_path)/../..)
 
 #   _____                    _

examples/simple-udp/main.go

@@ -176,6 +176,52 @@ func readWriteLoop(conn net.PacketConn, stop chan struct{}, s *sdk.SDK) {
 				respond(conn, sender, "ERROR: Invalid ANNOTATION command, must use zero or 2 arguments\n")
 				continue
 			}
+		case "PLAYER_CAPACITY":
+			switch len(parts) {
+			case 1:
+				respond(conn, sender, getPlayerCapacity(s))
+				continue
+			case 2:
+				if cap, err := strconv.Atoi(parts[1]); err != nil {
+					respond(conn, sender, err.Error()+"\n")
+					continue
+				} else {
+					setPlayerCapacity(s, int64(cap))
+				}
+			default:
+				respond(conn, sender, "ERROR: Invalid PLAYER_CAPACITY, should have 0 or 1 arguments\n")
+				continue
+			}
+
+		case "PLAYER_CONNECT":
+			if len(parts) < 2 {
+				respond(conn, sender, "ERROR: Invalid PLAYER_CONNECT, should have 1 arguments\n")
+				continue
+			}
+			playerConnect(s, parts[1])
+
+		case "PLAYER_DISCONNECT":
+			if len(parts) < 2 {
+				respond(conn, sender, "ERROR: Invalid PLAYER_CONNECT, should have 1 arguments\n")
+				continue
+			}
+			playerDisconnect(s, parts[1])
+
+		case "PLAYER_CONNECTED":
+			if len(parts) < 2 {
+				respond(conn, sender, "ERROR: Invalid PLAYER_CONNECTED, should have 1 arguments\n")
+				continue
+			}
+			respond(conn, sender, playerIsConnected(s, parts[1]))
+			continue
+
+		case "GET_PLAYERS":
+			respond(conn, sender, getConnectedPlayers(s))
+			continue
+
+		case "PLAYER_COUNT":
+			respond(conn, sender, getPlayerCount(s))
+			continue
 		}
 
 		respond(conn, sender, "ACK: "+txt+"\n")
@@ -284,6 +330,73 @@ func setLabel(s *sdk.SDK, key, value string) {
 	}
 }
 
+// setPlayerCapacity sets the player capacity to the given value
+func setPlayerCapacity(s *sdk.SDK, capacity int64) {
+	log.Printf("Setting Player Capacity to %d", capacity)
+	if err := s.Alpha().SetPlayerCapacity(capacity); err != nil {
+		log.Fatalf("could not set capacity: %v", err)
+	}
+}
+
+// getPlayerCapacity returns the current player capacity as a string
+func getPlayerCapacity(s *sdk.SDK) string {
+	log.Print("Getting Player Capacity")
+	capacity, err := s.Alpha().GetPlayerCapacity()
+	if err != nil {
+		log.Fatalf("could not get capacity: %v", err)
+	}
+	return strconv.FormatInt(capacity, 10)
+}
+
+// playerConnect connects a given player
+func playerConnect(s *sdk.SDK, id string) {
+	log.Printf("Connecting Player: %s", id)
+	if _, err := s.Alpha().PlayerConnect(id); err != nil {
+		log.Fatalf("could not connect player: %v", err)
+	}
+}
+
+// playerDisconnect disconnects a given player
+func playerDisconnect(s *sdk.SDK, id string) {
+	log.Printf("Disconnecting Player: %s", id)
+	if _, err := s.Alpha().PlayerDisconnect(id); err != nil {
+		log.Fatalf("could not disconnect player: %v", err)
+	}
+}
+
+// playerIsConnected returns a bool as a string if a player is connected
+func playerIsConnected(s *sdk.SDK, id string) string {
+	log.Printf("Checking if player %s is connected", id)
+
+	connected, err := s.Alpha().IsPlayerConnected(id)
+	if err != nil {
+		log.Fatalf("could not retrieve if player is connected: %v", err)
+	}
+
+	return strconv.FormatBool(connected)
+}
+
+// getConnectedPlayers returns a comma delimeted list of connected players
+func getConnectedPlayers(s *sdk.SDK) string {
+	log.Print("Retrieving connected player list")
+	list, err := s.Alpha().GetConnectedPlayers()
+	if err != nil {
+		log.Fatalf("could not retrieve connected players: %s", err)
+	}
+
+	return strings.Join(list, ",")
+}
+
+// getPlayerCount returns the count of connected players as a string
+func getPlayerCount(s *sdk.SDK) string {
+	log.Print("Retrieving connected player count")
+	count, err := s.Alpha().GetPlayerCount()
+	if err != nil {
+		log.Fatalf("could not retrieve player count: %s", err)
+	}
+	return strconv.FormatInt(count, 10)
+}
+
 // doHealth sends the regular Health Pings
 func doHealth(sdk *sdk.SDK, stop <-chan struct{}) {
 	tick := time.Tick(2 * time.Second)

test/e2e/framework/framework.go

@@ -147,7 +147,7 @@ func NewFromFlags() (*Framework, error) {
 	}
 
 	viper.SetDefault(kubeconfigFlag, filepath.Join(usr.HomeDir, "/.kube/config"))
-	viper.SetDefault(gsimageFlag, "gcr.io/agones-images/udp-server:0.19")
+	viper.SetDefault(gsimageFlag, "gcr.io/agones-images/udp-server:0.20")
 	viper.SetDefault(pullSecretFlag, "")
 	viper.SetDefault(stressTestLevelFlag, 0)
 	viper.SetDefault(perfOutputDirFlag, "")

test/e2e/gameserver_test.go

@@ -736,3 +736,161 @@ func TestGameServerResourceValidation(t *testing.T) {
 	assert.Equal(t, metav1.CauseTypeFieldValueInvalid, statusErr.Status().Details.Causes[0].Type)
 	assert.Equal(t, "container", statusErr.Status().Details.Causes[0].Field)
 }
+
+func TestGameServerSetPlayerCapacity(t *testing.T) {
+	if !runtime.FeatureEnabled(runtime.FeaturePlayerTracking) {
+		t.SkipNow()
+	}
+	t.Parallel()
+
+	t.Run("no initial capacity set", func(t *testing.T) {
+		gs := framework.DefaultGameServer(defaultNs)
+		gs, err := framework.CreateGameServerAndWaitUntilReady(defaultNs, gs)
+		if err != nil {
+			t.Fatalf("Could not get a GameServer ready: %v", err)
+		}
+		assert.Equal(t, gs.Status.State, agonesv1.GameServerStateReady)
+		assert.Equal(t, int64(0), gs.Status.Players.Capacity)
+
+		reply, err := e2eframework.SendGameServerUDP(gs, "PLAYER_CAPACITY")
+		assert.NoError(t, err)
+		assert.Equal(t, "0", reply)
+
+		reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_CAPACITY 20")
+		if err != nil {
+			t.Fatalf("Could not message GameServer: %v", err)
+		}
+		assert.Equal(t, "ACK: PLAYER_CAPACITY 20\n", reply)
+
+		reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_CAPACITY")
+		assert.NoError(t, err)
+		assert.Equal(t, "20", reply)
+
+		err = wait.PollImmediate(time.Second, time.Minute, func() (bool, error) {
+			gs, err := framework.AgonesClient.AgonesV1().GameServers(defaultNs).Get(gs.ObjectMeta.Name, metav1.GetOptions{})
+			if err != nil {
+				return false, err
+			}
+			return gs.Status.Players.Capacity == 20, nil
+		})
+		assert.NoError(t, err)
+	})
+
+	t.Run("initial capacity set", func(t *testing.T) {
+		gs := framework.DefaultGameServer(defaultNs)
+		gs.Spec.Players = &agonesv1.PlayersSpec{InitialCapacity: 10}
+		gs, err := framework.CreateGameServerAndWaitUntilReady(defaultNs, gs)
+		if err != nil {
+			t.Fatalf("Could not get a GameServer ready: %v", err)
+		}
+		assert.Equal(t, gs.Status.State, agonesv1.GameServerStateReady)
+		assert.Equal(t, int64(10), gs.Status.Players.Capacity)
+
+		reply, err := e2eframework.SendGameServerUDP(gs, "PLAYER_CAPACITY")
+		assert.NoError(t, err)
+		assert.Equal(t, "10", reply)
+
+		reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_CAPACITY 20")
+		if err != nil {
+			t.Fatalf("Could not message GameServer: %v", err)
+		}
+		assert.Equal(t, "ACK: PLAYER_CAPACITY 20\n", reply)
+
+		reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_CAPACITY")
+		assert.NoError(t, err)
+		assert.Equal(t, "20", reply)
+
+		err = wait.PollImmediate(time.Second, time.Minute, func() (bool, error) {
+			gs, err := framework.AgonesClient.AgonesV1().GameServers(defaultNs).Get(gs.ObjectMeta.Name, metav1.GetOptions{})
+			if err != nil {
+				return false, err
+			}
+			return gs.Status.Players.Capacity == 20, nil
+		})
+		assert.NoError(t, err)
+
+		time.Sleep(30 * time.Second)
+	})
+}
+
+func TestPlayerConnectAndDisconnect(t *testing.T) {
+	if !runtime.FeatureEnabled(runtime.FeaturePlayerTracking) {
+		t.SkipNow()
+	}
+	t.Parallel()
+
+	gs := framework.DefaultGameServer(defaultNs)
+	playerCount := int64(3)
+	gs.Spec.Players = &agonesv1.PlayersSpec{InitialCapacity: playerCount}
+	gs, err := framework.CreateGameServerAndWaitUntilReady(defaultNs, gs)
+	if err != nil {
+		t.Fatalf("Could not get a GameServer ready: %v", err)
+	}
+	assert.Equal(t, gs.Status.State, agonesv1.GameServerStateReady)
+	assert.Equal(t, playerCount, gs.Status.Players.Capacity)
+
+	// add three players in quick succession
+	for i := int64(1); i <= playerCount; i++ {
+		msg := "PLAYER_CONNECT " + fmt.Sprintf("%d", i)
+		logrus.WithField("msg", msg).Info("Sending Player Connect")
+		reply, err := e2eframework.SendGameServerUDP(gs, msg)
+		if err != nil {
+			t.Fatalf("Could not message GameServer: %v", err)
+		}
+		assert.Equal(t, fmt.Sprintf("ACK: %s\n", msg), reply)
+	}
+
+	// deliberately do this before polling, to test the SDK returning the correct
+	// results before it is committed to the GameServer resource.
+	reply, err := e2eframework.SendGameServerUDP(gs, "PLAYER_CONNECTED 1")
+	assert.NoError(t, err)
+	assert.Equal(t, "true", reply)
+
+	reply, err = e2eframework.SendGameServerUDP(gs, "GET_PLAYERS")
+	assert.NoError(t, err)
+	assert.ElementsMatch(t, []string{"1", "2", "3"}, strings.Split(reply, ","))
+
+	reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_COUNT")
+	assert.NoError(t, err)
+	assert.Equal(t, "3", reply)
+
+	err = wait.Poll(time.Second, time.Minute, func() (bool, error) {
+		gs, err = framework.AgonesClient.AgonesV1().GameServers(defaultNs).Get(gs.ObjectMeta.Name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		return gs.Status.Players.Count == playerCount, nil
+	})
+	assert.NoError(t, err)
+	assert.ElementsMatch(t, []string{"1", "2", "3"}, gs.Status.Players.IDs)
+
+	// let's disconnect player 2
+	logrus.Info("Disconnect Player 2")
+	reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_DISCONNECT 2")
+	if err != nil {
+		t.Fatalf("Could not message GameServer: %v", err)
+	}
+	assert.Equal(t, "ACK: PLAYER_DISCONNECT 2\n", reply)
+
+	reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_CONNECTED 2")
+	assert.NoError(t, err)
+	assert.Equal(t, "false", reply)
+
+	reply, err = e2eframework.SendGameServerUDP(gs, "GET_PLAYERS")
+	assert.NoError(t, err)
+	assert.ElementsMatch(t, []string{"1", "3"}, strings.Split(reply, ","))
+
+	reply, err = e2eframework.SendGameServerUDP(gs, "PLAYER_COUNT")
+	assert.NoError(t, err)
+	assert.Equal(t, "2", reply)
+
+	err = wait.Poll(time.Second, time.Minute, func() (bool, error) {
+		gs, err = framework.AgonesClient.AgonesV1().GameServers(defaultNs).Get(gs.ObjectMeta.Name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		return gs.Status.Players.Count == 2, nil
+	})
+	assert.NoError(t, err)
+	assert.ElementsMatch(t, []string{"1", "3"}, gs.Status.Players.IDs)
+}