Add a negative test case for referencing not exist BackendConfig

cmd/e2e-test/backend_config_test.go

@@ -0,0 +1,92 @@
+/*
+Copyright 2018 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 main
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
+	"k8s.io/apimachinery/pkg/util/wait"
+
+	"k8s.io/ingress-gce/pkg/annotations"
+	"k8s.io/ingress-gce/pkg/e2e"
+	"k8s.io/ingress-gce/pkg/fuzz"
+)
+
+var (
+	eventPollInterval = 15 * time.Second
+	eventPollTimeout  = 3 * time.Minute
+)
+
+func TestBackendConfigNotExist(t *testing.T) {
+	t.Parallel()
+
+	Framework.RunWithSandbox("BackendConfig not exist", t, func(t *testing.T, s *e2e.Sandbox) {
+		testBackendConfigAnnotation := map[string]string{
+			annotations.BackendConfigKey: `{"default":"not-exist"}`,
+		}
+		if _, _, err := e2e.CreateEchoService(s, "service-1", testBackendConfigAnnotation); err != nil {
+			t.Fatalf("e2e.CreateEchoService(s, service-1, %q) = _, _, %v, want _, _, nil", testBackendConfigAnnotation, err)
+		}
+
+		port80 := intstr.FromInt(80)
+		testIng := fuzz.NewIngressBuilder("", "ingress-1", "").
+			AddPath("test.com", "/", "service-1", port80).
+			Build()
+		testIng, err := Framework.Clientset.Extensions().Ingresses(s.Namespace).Create(testIng)
+		if err != nil {
+			t.Fatalf("error creating Ingress spec: %v", err)
+		}
+		t.Logf("Ingress %s/%s created", s.Namespace, testIng.Name)
+
+		t.Logf("Waiting for BackendConfig warning event to be emitted")
+		if err := wait.Poll(eventPollInterval, eventPollTimeout, func() (bool, error) {
+			events, err := Framework.Clientset.CoreV1().Events(s.Namespace).List(metav1.ListOptions{})
+			if err != nil {
+				return false, fmt.Errorf("error in listing events: %s", err)
+			}
+			for _, event := range events.Items {
+				if event.InvolvedObject.Kind != "Ingress" ||
+					event.InvolvedObject.Name != "ingress-1" ||
+					event.Type != v1.EventTypeWarning {
+					continue
+				}
+				if strings.Contains(event.Message, "no BackendConfig") {
+					t.Logf("BackendConfig warning event emitted")
+					return true, nil
+				}
+			}
+			t.Logf("No BackendConfig warning event is emitted yet")
+			return false, nil
+		}); err != nil {
+			t.Fatalf("error waiting for BackendConfig warning event: %v", err)
+		}
+
+		testIng, err = Framework.Clientset.Extensions().Ingresses(s.Namespace).Get(testIng.Name, metav1.GetOptions{})
+		if err != nil {
+			t.Fatalf("error retrieving Ingress %q: %v", testIng.Name, err)
+		}
+		if len(testIng.Status.LoadBalancer.Ingress) > 0 {
+			t.Fatalf("Ingress should not have an IP: %+v", testIng.Status)
+		}
+	})
+}