filter out logging

internal/log.go

@@ -27,13 +27,3 @@ func (l *logger) Printf(ctx context.Context, format string, v ...interface{}) {
 var Logger Logging = &logger{
 	log: log.New(os.Stderr, "redis: ", log.LstdFlags|log.Lshortfile),
 }
-
-// VoidLogger is a logger that does nothing.
-// Used to disable logging and thus speed up the library.
-type VoidLogger struct{}
-
-func (v *VoidLogger) Printf(_ context.Context, _ string, _ ...interface{}) {
-	// do nothing
-}
-
-var _ Logging = (*VoidLogger)(nil)

internal/pool/pool.go

@@ -385,7 +385,7 @@ func (p *ConnPool) getConn(ctx context.Context) (*Conn, error) {
 	attempts := 0
 	for {
 		if attempts >= getAttempts {
-			internal.Logger.Printf(ctx, "redis: connection pool: failed to get a connection accepted by hook after %d attempts", attempts)
+			internal.Logger.Printf(ctx, "redis: connection pool: was not able to get a connection accepted by hook after %d attempts", attempts)
 			break
 		}
 		attempts++

main_test.go

@@ -103,6 +103,9 @@ var _ = BeforeSuite(func() {
 	fmt.Printf("REDIS_VERSION: %.1f\n", RedisVersion)
 	fmt.Printf("CLIENT_LIBS_TEST_IMAGE: %v\n", os.Getenv("CLIENT_LIBS_TEST_IMAGE"))
 
+	tlogger := &TestLogger{}
+	tlogger.Filter("ERR unknown subcommand 'maint_notifications'")
+	redis.SetLogger(tlogger)
 	if RedisVersion < 7.0 || RedisVersion > 9 {
 		panic("incorrect or not supported redis version")
 	}
@@ -399,3 +402,21 @@ func (h *hook) ProcessPipelineHook(hook redis.ProcessPipelineHook) redis.Process
 	}
 	return hook
 }
+
+// TestLogger is a logger that filters out specific substrings so
+// the test output is not polluted with noise.
+type TestLogger struct {
+	filteredSugstrings []string
+}
+
+func (t *TestLogger) Filter(substr string) {
+	t.filteredSugstrings = append(t.filteredSugstrings, substr)
+}
+func (t *TestLogger) Printf(ctx context.Context, format string, v ...interface{}) {
+	for _, substr := range t.filteredSugstrings {
+		if strings.Contains(format, substr) {
+			return
+		}
+	}
+	fmt.Printf(format, v...)
+}

redis.go

@@ -456,7 +456,7 @@ func (c *baseClient) initConn(ctx context.Context, cn *pool.Conn) error {
 				c.optLock.Unlock()
 				return fmt.Errorf("failed to enable maintenance notifications: %w", hitlessHandshakeErr)
 			default: // will handle auto and any other
-				internal.Logger.Printf(ctx, "hitless: auto mode fallback: hitless upgrades disabled due to handshake failure: %v", hitlessHandshakeErr)
+				internal.Logger.Printf(ctx, "hitless: auto mode fallback: hitless upgrades disabled due to handshake error: %v", hitlessHandshakeErr)
 				c.opt.HitlessUpgradeConfig.Mode = hitless.MaintNotificationsDisabled
 				c.optLock.Unlock()
 				// auto mode, disable hitless upgrades and continue
@@ -1280,3 +1280,13 @@ func (c *baseClient) pushNotificationHandlerContext(cn *pool.Conn) push.Notifica
 		Conn:     &connectionAdapter{conn: cn}, // Wrap in adapter for easier interface access
 	}
 }
+
+// VoidLogger is a logger that does nothing.
+// Used to disable logging and thus speed up the library.
+type VoidLogger struct{}
+
+func (v *VoidLogger) Printf(_ context.Context, _ string, _ ...interface{}) {
+	// do nothing
+}
+
+var _ internal.Logging = (*VoidLogger)(nil)