Move codes to pkg (#46)

pkg/ingress/kube/annotations/default_backend_test.go

@@ -0,0 +1,229 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// 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 annotations
+
+import (
+	"context"
+	"reflect"
+	"testing"
+	"time"
+
+	networking "istio.io/api/networking/v1alpha3"
+	"istio.io/istio/pilot/pkg/model"
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/informers"
+	"k8s.io/client-go/kubernetes/fake"
+	listerv1 "k8s.io/client-go/listers/core/v1"
+	"k8s.io/client-go/tools/cache"
+)
+
+var (
+	normalService = &v1.Service{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "app",
+			Namespace: "test",
+		},
+		Spec: v1.ServiceSpec{
+			Ports: []v1.ServicePort{{
+				Name: "http",
+				Port: 80,
+			}},
+		},
+	}
+
+	abnormalService = &v1.Service{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      "app",
+			Namespace: "foo",
+		},
+	}
+)
+
+func TestFallbackParse(t *testing.T) {
+	fallback := fallback{}
+	inputCases := []struct {
+		input  map[string]string
+		expect *FallbackConfig
+	}{
+		{},
+		{
+			input: map[string]string{
+				buildNginxAnnotationKey(annDefaultBackend): "test/app",
+			},
+			expect: &FallbackConfig{
+				DefaultBackend: model.NamespacedName{
+					Namespace: "test",
+					Name:      "app",
+				},
+				Port: 80,
+			},
+		},
+		{
+			input: map[string]string{
+				buildMSEAnnotationKey(annDefaultBackend): "app",
+			},
+			expect: &FallbackConfig{
+				DefaultBackend: model.NamespacedName{
+					Namespace: "test",
+					Name:      "app",
+				},
+				Port: 80,
+			},
+		},
+		{
+			input: map[string]string{
+				buildMSEAnnotationKey(annDefaultBackend): "foo/app",
+			},
+		},
+		{
+			input: map[string]string{
+				buildMSEAnnotationKey(annDefaultBackend): "test/app",
+				buildNginxAnnotationKey(customHTTPError): "404,503",
+			},
+			expect: &FallbackConfig{
+				DefaultBackend: model.NamespacedName{
+					Namespace: "test",
+					Name:      "app",
+				},
+				Port:             80,
+				customHTTPErrors: []uint32{404, 503},
+			},
+		},
+		{
+			input: map[string]string{
+				buildMSEAnnotationKey(annDefaultBackend): "test/app",
+				buildNginxAnnotationKey(customHTTPError): "404,5ac",
+			},
+			expect: &FallbackConfig{
+				DefaultBackend: model.NamespacedName{
+					Namespace: "test",
+					Name:      "app",
+				},
+				Port:             80,
+				customHTTPErrors: []uint32{404},
+			},
+		},
+	}
+
+	for _, inputCase := range inputCases {
+		t.Run("", func(t *testing.T) {
+			config := &Ingress{
+				Meta: Meta{
+					Namespace: "test",
+					ClusterId: "cluster",
+				},
+			}
+			globalContext, cancel := initGlobalContextForService()
+			defer cancel()
+
+			_ = fallback.Parse(inputCase.input, config, globalContext)
+			if !reflect.DeepEqual(inputCase.expect, config.Fallback) {
+				t.Fatal("Should be equal")
+			}
+		})
+	}
+}
+
+func TestFallbackApplyRoute(t *testing.T) {
+	fallback := fallback{}
+	inputCases := []struct {
+		config *Ingress
+		input  *networking.HTTPRoute
+		expect *networking.HTTPRoute
+	}{
+		{
+			config: &Ingress{},
+			input:  &networking.HTTPRoute{},
+			expect: &networking.HTTPRoute{},
+		},
+		{
+			config: &Ingress{
+				Fallback: &FallbackConfig{
+					DefaultBackend: model.NamespacedName{
+						Namespace: "test",
+						Name:      "app",
+					},
+					Port:             80,
+					customHTTPErrors: []uint32{404, 503},
+				},
+			},
+			input: &networking.HTTPRoute{
+				Name: "route",
+				Route: []*networking.HTTPRouteDestination{
+					{},
+				},
+			},
+			expect: &networking.HTTPRoute{
+				Name: "route",
+				InternalActiveRedirect: &networking.HTTPInternalActiveRedirect{
+					MaxInternalRedirects:  1,
+					RedirectResponseCodes: []uint32{404, 503},
+					AllowCrossScheme:      true,
+					Headers: &networking.Headers{
+						Request: &networking.Headers_HeaderOperations{
+							Add: map[string]string{
+								FallbackInjectHeaderRouteName: "route" + FallbackRouteNameSuffix,
+								FallbackInjectFallbackService: "test/app",
+							},
+						},
+					},
+					RedirectUrlRewriteSpecifier: &networking.HTTPInternalActiveRedirect_RedirectUrl{
+						RedirectUrl: defaultRedirectUrl,
+					},
+					ForcedUseOriginalHost:             true,
+					ForcedAddHeaderBeforeRouteMatcher: true,
+				},
+				Route: []*networking.HTTPRouteDestination{
+					{
+						FallbackClusters: []*networking.Destination{
+							{
+								Host: "app.test.svc.cluster.local",
+								Port: &networking.PortSelector{
+									Number: 80,
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, inputCase := range inputCases {
+		t.Run("", func(t *testing.T) {
+			fallback.ApplyRoute(inputCase.input, inputCase.config)
+			if !reflect.DeepEqual(inputCase.input, inputCase.expect) {
+				t.Fatal("Should be equal")
+			}
+		})
+	}
+}
+
+func initGlobalContextForService() (*GlobalContext, context.CancelFunc) {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	client := fake.NewSimpleClientset(normalService, abnormalService)
+	informerFactory := informers.NewSharedInformerFactory(client, time.Hour)
+	serviceInformer := informerFactory.Core().V1().Services()
+	go serviceInformer.Informer().Run(ctx.Done())
+	cache.WaitForCacheSync(ctx.Done(), serviceInformer.Informer().HasSynced)
+
+	return &GlobalContext{
+		ClusterServiceList: map[string]listerv1.ServiceLister{
+			"cluster": serviceInformer.Lister(),
+		},
+	}, cancel
+}