test(e2e): add operator initData validation event test

hack/deploy-karmada-operator.sh

@@ -70,4 +70,4 @@ kubectl --kubeconfig="${KUBECONFIG}" --context="${CONTEXT_NAME}" apply -f "${REP
 kubectl --kubeconfig="${KUBECONFIG}" --context="${CONTEXT_NAME}" apply -f "${REPO_ROOT}/operator/config/deploy/karmada-operator-deployment.yaml"
 
 # wait karmada-operator ready
-kubectl --kubeconfig="${KUBECONFIG}" --context="${CONTEXT_NAME}" wait --for=condition=Ready --timeout=30s pods -l app.kubernetes.io/name=karmada-operator -n ${KARMADA_SYSTEM_NAMESPACE}
+kubectl --kubeconfig="${KUBECONFIG}" --context="${CONTEXT_NAME}" rollout status deployment/karmada-operator --timeout=90s -n ${KARMADA_SYSTEM_NAMESPACE}

test/e2e/suites/operator/validating_test.go

@@ -0,0 +1,95 @@
+/*
+Copyright 2026 The Karmada Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package e2e
+
+import (
+	"context"
+	"strings"
+
+	"github.com/onsi/ginkgo/v2"
+	"github.com/onsi/gomega"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/rand"
+
+	operatorv1alpha1 "github.com/karmada-io/karmada/operator/pkg/apis/operator/v1alpha1"
+	karmadacontroller "github.com/karmada-io/karmada/operator/pkg/controller/karmada"
+	operatorresource "github.com/karmada-io/karmada/test/e2e/framework/resource/operator"
+	"github.com/karmada-io/karmada/test/helper"
+)
+
+var _ = ginkgo.Describe("Karmada validation event testing", func() {
+	const validationErrorMessageSubstring = "invalid CRDs remote URL"
+
+	var karmadaName string
+
+	ginkgo.BeforeEach(func() {
+		karmadaName = KarmadaInstanceNamePrefix + rand.String(RandomStrLength)
+	})
+
+	ginkgo.AfterEach(func() {
+		operatorresource.DeleteKarmadaInstance(operatorClient, testNamespace, karmadaName)
+	})
+
+	ginkgo.It("should emit warning event and set Ready condition false when CRD tarball HTTP URL is invalid", func() {
+		ginkgo.By("Step 1: create the Karmada instance with an invalid CRD tarball URL", func() {
+			karmada := helper.NewKarmada(testNamespace, karmadaName)
+			karmada.Spec.CRDTarball.HTTPSource.URL = "bad-url"
+
+			err := operatorresource.CreateKarmadaInstance(operatorClient, karmada)
+			gomega.Expect(err).ShouldNot(gomega.HaveOccurred())
+		})
+
+		ginkgo.By("Step 2: assert Ready condition becomes False with ValidationError reason", func() {
+			gomega.Eventually(func(g gomega.Gomega) {
+				updated, err := operatorClient.OperatorV1alpha1().Karmadas(testNamespace).Get(context.TODO(), karmadaName, metav1.GetOptions{})
+				g.Expect(err).ShouldNot(gomega.HaveOccurred())
+
+				var readyCond *metav1.Condition
+				for i := range updated.Status.Conditions {
+					if updated.Status.Conditions[i].Type == string(operatorv1alpha1.Ready) {
+						readyCond = &updated.Status.Conditions[i]
+						break
+					}
+				}
+
+				g.Expect(readyCond).ShouldNot(gomega.BeNil())
+				g.Expect(readyCond.Status).Should(gomega.Equal(metav1.ConditionFalse))
+				g.Expect(readyCond.Reason).Should(gomega.Equal(karmadacontroller.ValidationErrorReason))
+				g.Expect(readyCond.Message).Should(gomega.ContainSubstring(validationErrorMessageSubstring))
+			}, pollTimeout, pollInterval).Should(gomega.Succeed())
+		})
+
+		ginkgo.By("Step 3: assert Warning ValidationError event is emitted", func() {
+			gomega.Eventually(func(g gomega.Gomega) bool {
+				events, err := hostClient.CoreV1().Events(testNamespace).List(context.TODO(), metav1.ListOptions{})
+				g.Expect(err).ShouldNot(gomega.HaveOccurred())
+
+				for _, event := range events.Items {
+					if event.InvolvedObject.Name == karmadaName &&
+						event.Type == corev1.EventTypeWarning &&
+						event.Reason == karmadacontroller.ValidationErrorReason &&
+						strings.Contains(event.Message, validationErrorMessageSubstring) {
+						return true
+					}
+				}
+
+				return false
+			}, pollTimeout, pollInterval).Should(gomega.BeTrue())
+		})
+	})
+})