Add testcase && hook logger for server

logger/slog/slog.go

@@ -69,6 +69,7 @@ func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
 type slogLogger struct {
 	leveler *slog.LevelVar
 	handler slog.Handler
+	slog    slog.Logger
 	opts    logger.Options
 	mu      sync.RWMutex
 }

logger/slog/slog_test.go

@@ -235,3 +235,29 @@ func Test_WithContextAttrFunc(t *testing.T) {
 		t.Fatalf("logger info, buf %s", buf.Bytes())
 	}
 }
+
+func Test_CloneAttrInHandler(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+
+	log := NewLogger(logger.WithLevel(logger.DebugLevel), logger.WithOutput(buf), logger.WithAddSource(false))
+	if err := log.Init(); err != nil {
+		t.Fatal(err)
+	}
+	log = log.Fields("key", "val")
+
+	nlog := log.Clone(logger.WithLevel(logger.InfoLevel))
+	if err := nlog.Init(); err != nil {
+		t.Fatal(err)
+	}
+
+	nlog.Info(ctx, "new log info message")
+	log.Info(ctx, "original log info message")
+
+	/* Buffer has:
+
+	   {"timestamp":"2024-11-24T01:12:30.752866543+03:00","level":"info","msg":"new log info message"}
+	   {"timestamp":"2024-11-24T01:12:35.528170034+03:00","level":"info","msg":"original log info message","key":"val"}
+	*/
+
+}