feat: add discard logger

pkg/logging/discard.go

@@ -0,0 +1,42 @@
+package logging
+
+import (
+	"context"
+	"log/slog"
+)
+
+var _ slog.Handler = (*DiscardHandler)(nil)
+
+// NewTestLogger returns a no-op logger that discards all output.
+// Perfect for unit tests where you don't want to see log output.
+func NewTestLogger() *slog.Logger {
+	return slog.New(NewDiscardHandler())
+}
+
+// DiscardHandler implements slog.Handler but discards all log records.
+type DiscardHandler struct{}
+
+// NewDiscardHandler creates a new handler that discards all logs.
+func NewDiscardHandler() *DiscardHandler {
+	return &DiscardHandler{}
+}
+
+// Enabled always returns false to minimize overhead.
+func (h *DiscardHandler) Enabled(_ context.Context, _ slog.Level) bool {
+	return false
+}
+
+// Handle discards the record and does nothing.
+func (h *DiscardHandler) Handle(_ context.Context, _ slog.Record) error {
+	return nil
+}
+
+// WithAttrs returns a new handler with the same behavior.
+func (h *DiscardHandler) WithAttrs(_ []slog.Attr) slog.Handler {
+	return h
+}
+
+// WithGroup returns a new handler with the same behavior.
+func (h *DiscardHandler) WithGroup(_ string) slog.Handler {
+	return h
+}