Enhance Unit Tests for Annotations

Adds unit tests for a variety of different annotations.

internal/ingress/annotations/defaultbackend/main_test.go

@@ -0,0 +1,105 @@
+/*
+Copyright 2015 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 defaultbackend
+
+import (
+	"testing"
+
+	api "k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
+	meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
+	"k8s.io/ingress-nginx/internal/ingress/errors"
+	"k8s.io/ingress-nginx/internal/ingress/resolver"
+
+	"k8s.io/apimachinery/pkg/util/intstr"
+)
+
+func buildIngress() *extensions.Ingress {
+	defaultBackend := extensions.IngressBackend{
+		ServiceName: "default-backend",
+		ServicePort: intstr.FromInt(80),
+	}
+
+	return &extensions.Ingress{
+		ObjectMeta: meta_v1.ObjectMeta{
+			Name:      "foo",
+			Namespace: api.NamespaceDefault,
+		},
+		Spec: extensions.IngressSpec{
+			Backend: &extensions.IngressBackend{
+				ServiceName: "default-backend",
+				ServicePort: intstr.FromInt(80),
+			},
+			Rules: []extensions.IngressRule{
+				{
+					Host: "foo.bar.com",
+					IngressRuleValue: extensions.IngressRuleValue{
+						HTTP: &extensions.HTTPIngressRuleValue{
+							Paths: []extensions.HTTPIngressPath{
+								{
+									Path:    "/foo",
+									Backend: defaultBackend,
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+type mockService struct {
+	resolver.Mock
+}
+
+// GetService mocks the GetService call from the defaultbackend package
+func (m mockService) GetService(name string) (*api.Service, error) {
+	if name != "default/demo-service" {
+		return nil, errors.Errorf("there is no service with name %v", name)
+	}
+
+	return &api.Service{
+		ObjectMeta: meta_v1.ObjectMeta{
+			Namespace: api.NamespaceDefault,
+			Name:      "demo-service",
+		},
+	}, nil
+}
+
+func TestAnnotations(t *testing.T) {
+	ing := buildIngress()
+
+	data := map[string]string{}
+	data[parser.GetAnnotationWithPrefix("default-backend")] = "demo-service"
+	ing.SetAnnotations(data)
+
+	fakeService := &mockService{}
+	i, err := NewParser(fakeService).Parse(ing)
+	if err != nil {
+		t.Errorf("unexpected error %v", err)
+	}
+
+	svc, ok := i.(*api.Service)
+	if !ok {
+		t.Errorf("expected *api.Service but got %v", svc)
+	}
+	if svc.Name != "demo-service" {
+		t.Errorf("expected %v but got %v", "demo-service", svc.Name)
+	}
+}