test/e2e: add check at anti-affinity test to ensure enough hosts exist

test/e2e/anti_affinity_test.go

@@ -88,6 +88,11 @@ func VerifyAntiAffinity(ctx context.Context, input AntiAffinitySpecInput) {
 	clusterName := fmt.Sprintf("anti-affinity-%s", util.RandomString(6))
 	Expect(namespace).NotTo(BeNil())
 
+	By("checking if the target system has enough hosts")
+	hostSystems, err := input.Finder.HostSystemList(ctx, "*")
+	Expect(err).ToNot(HaveOccurred())
+	Expect(len(hostSystems) > int(input.WorkerNodeCount)).To(BeTrue(), "This test requires more or equal number of hosts compared to WorkerNodeCount")
+
 	Byf("creating a workload cluster %s", clusterName)
 	configCluster := defaultConfigCluster(clusterName, namespace.Name, "", 1, input.WorkerNodeCount,
 		input.Global)