Add tests. They are quite basic ...

logger/logger_test.go

@@ -0,0 +1,72 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
+package logger
+
+import (
+	"bytes"
+	"log"
+	"os"
+	"strings"
+	"testing"
+
+	"govpp-snmp-agentx/config"
+)
+
+func TestPrintf(t *testing.T) {
+	// Capture log output
+	var buf bytes.Buffer
+	log.SetOutput(&buf)
+	defer log.SetOutput(os.Stderr)
+
+	Printf("test message: %s", "hello")
+
+	output := buf.String()
+	if !strings.Contains(output, "logger_test.go:logger.TestPrintf") {
+		t.Errorf("Expected log output to contain caller info, got: %s", output)
+	}
+	if !strings.Contains(output, "test message: hello") {
+		t.Errorf("Expected log output to contain message, got: %s", output)
+	}
+}
+
+func TestDebugfWithDebugEnabled(t *testing.T) {
+	// Save original debug state
+	originalDebug := config.Debug
+	defer func() { config.Debug = originalDebug }()
+
+	// Enable debug
+	config.Debug = true
+
+	// Capture log output
+	var buf bytes.Buffer
+	log.SetOutput(&buf)
+	defer log.SetOutput(os.Stderr)
+
+	Debugf("debug message: %s", "test")
+
+	output := buf.String()
+	if !strings.Contains(output, "debug message: test") {
+		t.Errorf("Expected debug message to be logged when debug is enabled, got: %s", output)
+	}
+}
+
+func TestDebugfWithDebugDisabled(t *testing.T) {
+	// Save original debug state
+	originalDebug := config.Debug
+	defer func() { config.Debug = originalDebug }()
+
+	// Disable debug
+	config.Debug = false
+
+	// Capture log output
+	var buf bytes.Buffer
+	log.SetOutput(&buf)
+	defer log.SetOutput(os.Stderr)
+
+	Debugf("debug message: %s", "test")
+
+	output := buf.String()
+	if strings.Contains(output, "debug message: test") {
+		t.Errorf("Expected debug message to NOT be logged when debug is disabled, got: %s", output)
+	}
+}