log: add Handler getter to Logger interface (#28793)

log: Add Handler getter to Logger interface

internal/testlog/testlog.go

@@ -98,6 +98,10 @@ func LoggerWithHandler(t *testing.T, handler slog.Handler) log.Logger {
 	}
 }
 
+func (l *logger) Handler() slog.Handler {
+	return l.l.Handler()
+}
+
 func (l *logger) Write(level slog.Level, msg string, ctx ...interface{}) {}
 
 func (l *logger) Enabled(ctx context.Context, level slog.Level) bool {

log/logger.go

@@ -137,6 +137,9 @@ type Logger interface {
 
 	// Enabled reports whether l emits log records at the given context and level.
 	Enabled(ctx context.Context, level slog.Level) bool
+
+	// Handler returns the underlying handler of the inner logger.
+	Handler() slog.Handler
 }
 
 type logger struct {
@@ -150,6 +153,10 @@ func NewLogger(h slog.Handler) Logger {
 	}
 }
 
+func (l *logger) Handler() slog.Handler {
+	return l.inner.Handler()
+}
+
 // write logs a message at the specified level:
 func (l *logger) Write(level slog.Level, msg string, attrs ...any) {
 	if !l.inner.Enabled(context.Background(), level) {