test: add simple unit tests for backend and logging packages

internal/logging/logger_test.go

@@ -0,0 +1,76 @@
+package logging
+
+import (
+	"testing"
+)
+
+func TestGetLogger(t *testing.T) {
+	// Reset the global logger for this test
+	Logger = nil
+
+	result := GetLogger()
+
+	if result == nil {
+		t.Error("GetLogger() returned nil")
+	}
+}
+
+func TestGetLoggerMultipleCalls(t *testing.T) {
+	// Reset the global logger for this test
+	Logger = nil
+
+	logger1 := GetLogger()
+	logger2 := GetLogger()
+
+	if logger1 != logger2 {
+		t.Error("GetLogger() returned different instances on multiple calls")
+	}
+}
+
+func TestGetSugaredLogger(t *testing.T) {
+	// Reset the global sugared logger for this test
+	SugaredLogger = nil
+
+	result := GetSugaredLogger()
+
+	if result == nil {
+		t.Error("GetSugaredLogger() returned nil")
+	}
+}
+
+func TestGetSugaredLoggerMultipleCalls(t *testing.T) {
+	// Reset the global sugared logger for this test
+	SugaredLogger = nil
+
+	logger1 := GetSugaredLogger()
+	logger2 := GetSugaredLogger()
+
+	if logger1 != logger2 {
+		t.Error("GetSugaredLogger() returned different instances on multiple calls")
+	}
+}
+
+func TestInit(t *testing.T) {
+	// Test JSON output
+	Init("debug", true)
+	logger := GetLogger()
+	if logger == nil {
+		t.Error("Init with json output failed")
+	}
+
+	// Test console output
+	Init("info", false)
+	logger = GetLogger()
+	if logger == nil {
+		t.Error("Init with console output failed")
+	}
+}
+
+func TestInitInvalidLevel(t *testing.T) {
+	// Test with invalid log level - should default to info
+	Init("invalid_level", false)
+	logger := GetLogger()
+	if logger == nil {
+		t.Error("Init with invalid level failed")
+	}
+}