Enhance Unit Tests for Annotations

Adds unit tests for a variety of different annotations.

internal/ingress/annotations/customhttperrors/main_test.go

@@ -0,0 +1,91 @@
+/*
+Copyright 2019 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 customhttperrors
+
+import (
+	"reflect"
+	"sort"
+	"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/resolver"
+
+	"k8s.io/apimachinery/pkg/util/intstr"
+)
+
+func buildIngress() *extensions.Ingress {
+	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),
+			},
+		},
+	}
+}
+
+func TestParseInvalidAnnotations(t *testing.T) {
+	ing := buildIngress()
+
+	_, err := NewParser(&resolver.Mock{}).Parse(ing)
+	if err == nil {
+		t.Errorf("expected error parsing ingress with custom-http-errors")
+	}
+
+	data := map[string]string{}
+	data[parser.GetAnnotationWithPrefix("custom-http-errors")] = "400,404,abc,502"
+	ing.SetAnnotations(data)
+
+	i, err := NewParser(&resolver.Mock{}).Parse(ing)
+	if err == nil {
+		t.Errorf("expected error parsing ingress with custom-http-errors")
+	}
+	if i != nil {
+		t.Errorf("expected %v but got %v", nil, i)
+	}
+}
+
+func TestParseAnnotations(t *testing.T) {
+	ing := buildIngress()
+
+	data := map[string]string{}
+	data[parser.GetAnnotationWithPrefix("custom-http-errors")] = "400,404,500,502"
+	ing.SetAnnotations(data)
+
+	i, err := NewParser(&resolver.Mock{}).Parse(ing)
+	if err != nil {
+		t.Errorf("unexpected error parsing ingress with custom-http-errors")
+	}
+	val, ok := i.([]int)
+	if !ok {
+		t.Errorf("expected a []int type")
+	}
+
+	expected := []int{400, 404, 500, 502}
+	sort.Ints(val)
+
+	if !reflect.DeepEqual(expected, val) {
+		t.Errorf("expected %v but got %v", expected, val)
+	}
+}