Fix flapping test and limit channel recv when there is an error

Signed-off-by: Matthias Hanel <mh@synadia.com>

server/jwt_test.go

@@ -52,6 +52,15 @@ func init() {
 	}
 }
 
+func chanRecv(t *testing.T, recvChan <-chan struct{}, limit time.Duration) {
+	t.Helper()
+	select {
+	case <-recvChan:
+	case <-time.After(limit):
+		t.Fatal("Should have received from channel")
+	}
+}
+
 func opTrustBasicSetup() *Server {
 	kp, _ := nkeys.FromSeed(oSeed)
 	pub, _ := kp.PublicKey()
@@ -1844,8 +1853,8 @@ func TestAccountURLResolverFetchFailureInCluster(t *testing.T) {
 	// startup cluster
 	checkClusterFormed(t, sA, sB)
 	// Both server observed one fetch on startup
-	<-chanImpA
-	<-chanImpB
+	chanRecv(t, chanImpA, 10*time.Second)
+	chanRecv(t, chanImpB, 10*time.Second)
 	assertChanLen(0, chanImpA, chanImpB, chanExpA, chanExpB)
 	// Create first client, directly connects to A
 	urlA := fmt.Sprintf("nats://%s:%d", sA.opts.Host, sA.opts.Port)
@@ -1870,8 +1879,8 @@ func TestAccountURLResolverFetchFailureInCluster(t *testing.T) {
 	}
 	defer subA.Unsubscribe()
 	// Connect of client triggered a fetch by Server A
-	<-chanImpA
-	<-chanExpA
+	chanRecv(t, chanImpA, 10*time.Second)
+	chanRecv(t, chanExpA, 10*time.Second)
 	assertChanLen(0, chanImpA, chanImpB, chanExpA, chanExpB)
 	//time.Sleep(10 * time.Second)
 	// create second client, directly connect to B
@@ -1882,8 +1891,8 @@ func TestAccountURLResolverFetchFailureInCluster(t *testing.T) {
 	}
 	defer ncB.Close()
 	// Connect of client triggered a fetch by Server B
-	<-chanImpB
-	<-chanExpB
+	chanRecv(t, chanImpB, 10*time.Second)
+	chanRecv(t, chanExpB, 10*time.Second)
 	assertChanLen(0, chanImpA, chanImpB, chanExpA, chanExpB)
 	checkClusterFormed(t, sA, sB)
 	// the route subscription was lost due to the failed fetch
@@ -3358,8 +3367,8 @@ func TestJWTTimeExpiration(t *testing.T) {
 					errChan <- struct{}{}
 				}
 			}))
-		<-errChan
-		<-disconnectChan
+		chanRecv(t, errChan, 10*time.Second)
+		chanRecv(t, disconnectChan, 10*time.Second)
 		require_True(t, c.IsReconnecting())
 		require_False(t, c.IsConnected())
 		c.Close()
@@ -3397,11 +3406,11 @@ func TestJWTTimeExpiration(t *testing.T) {
 					errChan <- struct{}{}
 				}
 			}))
-		<-errChan
-		<-reConnectChan
+		chanRecv(t, errChan, 10*time.Second)
+		chanRecv(t, reConnectChan, 10*time.Second)
 		require_False(t, c.IsReconnecting())
 		require_True(t, c.IsConnected())
-		<-errChan
+		chanRecv(t, errChan, 10*time.Second)
 		c.Close()
 	})
 	t.Run("lower jwt expiration overwrites time", func(t *testing.T) {
@@ -3431,15 +3440,15 @@ func TestJWTTimeExpiration(t *testing.T) {
 					errChan <- struct{}{}
 				}
 			}))
-		<-errChan
-		<-disconnectChan
+		chanRecv(t, errChan, 10*time.Second)
+		chanRecv(t, disconnectChan, 10*time.Second)
 		require_True(t, c.IsReconnecting())
 		require_False(t, c.IsConnected())
 		c.Close()
 	})
 }
 
-func TestJWTSubLimits(t *testing.T) {
+func TestJWTLimits(t *testing.T) {
 	doNotExpire := time.Now().AddDate(1, 0, 0)
 	// create account
 	kp, _ := nkeys.CreateAccount()
@@ -3470,32 +3479,28 @@ func TestJWTSubLimits(t *testing.T) {
 				}
 			}),
 		)
+		defer c.Close()
 		if _, err := c.Subscribe("foo", func(msg *nats.Msg) {}); err != nil {
 			t.Fatalf("couldn't subscribe: %v", err)
 		}
 		if _, err = c.Subscribe("bar", func(msg *nats.Msg) {}); err != nil {
 			t.Fatalf("expected error got: %v", err)
 		}
-		<-errChan
-		c.Close()
+		chanRecv(t, errChan, time.Second)
 	})
 	t.Run("payload", func(t *testing.T) {
 		creds := createUserWithLimit(t, kp, doNotExpire, func(j *jwt.Limits) { j.Payload = 5 })
 		defer os.Remove(creds)
-		c := natsConnect(t, sA.ClientURL(), nats.UserCredentials(creds),
-			nats.DisconnectErrHandler(func(conn *nats.Conn, err error) {
-				if e := conn.LastError(); e != nil && strings.Contains(e.Error(), "Maximum Payload Violation") {
-					errChan <- struct{}{}
-				}
-			}),
-		)
+		c := natsConnect(t, sA.ClientURL(), nats.UserCredentials(creds))
+		defer c.Close()
+		if err := c.Flush(); err != nil {
+			t.Fatalf("flush failed %v", err)
+		}
 		if err := c.Publish("foo", []byte("world")); err != nil {
 			t.Fatalf("couldn't publish: %v", err)
 		}
-		if err := c.Publish("foo", []byte("worldX")); err != nil {
+		if err := c.Publish("foo", []byte("worldX")); err != nats.ErrMaxPayload {
 			t.Fatalf("couldn't publish: %v", err)
 		}
-		<-errChan
-		c.Close()
 	})
 }