Improve error checks around FetchIngressIP

tests/e2e/testutils.go

@@ -350,6 +350,9 @@ func FetchIngressIP(kubeconfig string) ([]string, error) {
 	}
 	ingressIP := strings.Trim(res, " ")
 	ingressIPs := strings.Split(ingressIP, " ")
+	if len(ingressIPs) == 0 {
+		return nil, errors.New("no ingress IP found")
+	}
 	return ingressIPs, nil
 }
 

tests/e2e/wasm/wasm_test.go

@@ -97,9 +97,13 @@ var _ = Describe("Verify K3s can run Wasm workloads", Ordered, func() {
 		})
 
 		It("Interact with Wasm applications", func() {
-			ingressIPs, err := e2e.FetchIngressIP(tc.KubeConfigFile)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(ingressIPs).To(HaveLen(1))
+			var ingressIPs []string
+			var err error
+			Eventually(func(g Gomega) {
+				ingressIPs, err = e2e.FetchIngressIP(tc.KubeConfigFile)
+				g.Expect(err).NotTo(HaveOccurred())
+				g.Expect(ingressIPs).To(HaveLen(1))
+			}, "120s", "5s").Should(Succeed())
 
 			endpoints := []string{"slight/hello", "spin/go-hello", "spin/hello"}
 			for _, endpoint := range endpoints {