test: add coverage to find issues running on the next kubernetes release as management cluster

Author: chrischdi

test/e2e/clusterctl_upgrade_test.go

@@ -28,6 +28,7 @@ import (
 	"k8s.io/utils/ptr"
 
 	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
+	"sigs.k8s.io/cluster-api/test/framework/kubernetesversions"
 )
 
 var (
@@ -325,3 +326,31 @@ var _ = Describe("When testing clusterctl upgrades using ClusterClass (v1.7=>cur
 		}
 	})
 })
+
+var _ = Describe("When testing clusterctl upgrades using ClusterClass (v1.7=>current) on latest management cluster [ClusterClass]", func() {
+	// Get v1.7 latest stable release
+	version := "1.7"
+	stableRelease, err := GetStableReleaseOfMinor(ctx, version)
+	Expect(err).ToNot(HaveOccurred(), "Failed to get stable version for minor release : %s", version)
+	ClusterctlUpgradeSpec(ctx, func() ClusterctlUpgradeSpecInput {
+		initKubernetesVersion, err := kubernetesversions.ResolveVersion(ctx, e2eConfig.GetVariable("KUBERNETES_VERSION_LATEST_CI"))
+		Expect(err).ToNot(HaveOccurred())
+		return ClusterctlUpgradeSpecInput{
+			E2EConfig:                 e2eConfig,
+			ClusterctlConfigPath:      clusterctlConfigPath,
+			BootstrapClusterProxy:     bootstrapClusterProxy,
+			ArtifactFolder:            artifactFolder,
+			SkipCleanup:               skipCleanup,
+			InfrastructureProvider:    ptr.To("docker"),
+			InitWithBinary:            fmt.Sprintf(clusterctlDownloadURL, stableRelease),
+			InitWithProvidersContract: "v1beta1",
+			// Note: InitWithKubernetesVersion should be the latest of the next supported kubernetes version by the target Cluster API version.
+			// Note: WorkloadKubernetesVersion should be the highest mgmt cluster version supported by the source Cluster API version.
+			InitWithKubernetesVersion:   initKubernetesVersion,
+			WorkloadKubernetesVersion:   "v1.30.0",
+			MgmtFlavor:                  "topology",
+			WorkloadFlavor:              "topology",
+			UseKindForManagementCluster: true,
+		}
+	})
+})