test: add cluster-upgrade test with Runtime SDK

test/e2e/cluster_upgrade_runtimesdk_test.go

@@ -0,0 +1,57 @@
+/*
+Copyright 2024 The Kubernetes 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 (
+	"github.com/blang/semver/v4"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"k8s.io/utils/ptr"
+	clusterctlcluster "sigs.k8s.io/cluster-api/cmd/clusterctl/client/cluster"
+	capi_e2e "sigs.k8s.io/cluster-api/test/e2e"
+	"sigs.k8s.io/cluster-api/test/framework"
+)
+
+var _ = Describe("When upgrading a workload cluster using ClusterClass with RuntimeSDK [vcsim] [supervisor] [ClusterClass]", func() {
+	const specName = "k8s-upgrade-with-runtimesdk" // aligned to CAPI
+	Setup(specName, func(testSpecificSettingsGetter func() testSettings) {
+		capi_e2e.ClusterUpgradeWithRuntimeSDKSpec(ctx, func() capi_e2e.ClusterUpgradeWithRuntimeSDKSpecInput {
+			version, err := semver.ParseTolerant(e2eConfig.GetVariable(capi_e2e.KubernetesVersionUpgradeFrom))
+			Expect(err).ToNot(HaveOccurred(), "Invalid argument, KUBERNETES_VERSION_UPGRADE_FROM is not a valid version")
+			if version.LT(semver.MustParse("1.24.0")) {
+				Fail("This test only supports upgrades from Kubernetes >= v1.24.0")
+			}
+
+			return capi_e2e.ClusterUpgradeWithRuntimeSDKSpecInput{
+				E2EConfig:             e2eConfig,
+				ClusterctlConfigPath:  testSpecificSettingsGetter().ClusterctlConfigPath,
+				BootstrapClusterProxy: bootstrapClusterProxy,
+				ArtifactFolder:        artifactFolder,
+				SkipCleanup:           skipCleanup,
+				PostUpgrade: func(proxy framework.ClusterProxy, namespace, clusterName string) {
+					// This check ensures that the resourceVersions are stable, i.e. it verifies there are no
+					// continuous reconciles when everything should be stable.
+					framework.ValidateResourceVersionStable(ctx, proxy, namespace, clusterctlcluster.FilterClusterObjectsWithNameFilter(clusterName))
+				},
+				// "upgrades-runtimesdk" is the same as the "topology" flavor but with an additional RuntimeExtension.
+				Flavor:               ptr.To(testSpecificSettingsGetter().FlavorForMode("upgrades-runtimesdk")),
+				ExtensionNamespace:   "capv-test-extension-system",
+				ExtensionServiceName: "capv-test-extension-webhook-service",
+			}
+		})
+	})
+})