add function about create random namespace

Signed-off-by: LiZhenCheng9527 <lizhencheng6@huawei.com>

Author: LiZhenCheng9527

e2e/attachedcluster_test.go

@@ -43,7 +43,7 @@ var _ = ginkgo.Describe("[AttachedClusters] AttachedClusters testing", func() {
 	)
 
 	ginkgo.BeforeEach(func() {
-		namespace = "e2e-test"
+		namespace = resources.RandomNamespace(5)
 		fleetname = "e2etest"
 		memberClusterName = "kurator-member"
 		homeDir, err := os.UserHomeDir()

e2e/resources/namespace.go

@@ -18,13 +18,17 @@ package resources
 
 import (
 	"context"
+	"math/rand"
+	"strings"
 
 	corev1 "k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 )
 
+const chartSet = "abcdefghijklmnopqrstuvwxyz"
+
 // NewNamespace will build a Namespace object.
 func NewNamespace(namespace string) *corev1.Namespace {
 	return &corev1.Namespace{
@@ -57,3 +61,12 @@ func RemoveNamespace(client kubernetes.Interface, name string) error {
 	}
 	return nil
 }
+
+func RandomNamespace(nameLength int) string {
+	randomNS := strings.Builder{}
+	randomNS.Grow(nameLength)
+	for i := 0; i < nameLength; i++ {
+		randomNS.WriteByte(chartSet[rand.Intn(len(chartSet))])
+	}
+	return randomNS.String()
+}