test: add an unit test to cover AsResult method

Signed-off-by: Jiawei Zhao <Phoenxi500526@163.com>

internal/controller/sharded_test.go

@@ -0,0 +1,40 @@
+package controller
+
+import (
+	"errors"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	update_errors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	ctrl "sigs.k8s.io/controller-runtime"
+)
+
+func TestAsResult(t *testing.T) {
+	// Test case 1: No errors
+	errSet := StCtrlErrSet{}
+	result, err := errSet.AsResult()
+	assert.NoError(t, err)
+	assert.Equal(t, ctrl.Result{}, result)
+
+	// Test case 2: Update conflict error
+	statusErr := update_errors.StatusError{ErrStatus: metav1.Status{
+		Reason: metav1.StatusReasonConflict,
+		Code:   http.StatusConflict,
+	}}
+	errSet = StCtrlErrSet{Update: error(&statusErr)}
+	result, err = errSet.AsResult()
+	assert.NoError(t, err)
+	assert.Equal(t, ctrl.Result{Requeue: true}, result)
+
+	// Test case 3: Other Errors
+	errSet = StCtrlErrSet{
+		Rec:    errors.New("reconciliation error"),
+		Sync:   errors.New("sync error"),
+		Update: errors.New("sync error"),
+	}
+	result, err = errSet.AsResult()
+	assert.Error(t, err)
+	assert.Equal(t, ctrl.Result{Requeue: true}, result)
+}