Backend TLS Policy Cel tests

pkg/test/cel/backendtlspolicy_test.go

@@ -0,0 +1,149 @@
+//go:build experimental
+// +build experimental
+
+/*
+Copyright 2023 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 (
+	"context"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	gatewayv1a2 "sigs.k8s.io/gateway-api/apis/v1alpha2"
+	"sigs.k8s.io/gateway-api/apis/v1beta1"
+)
+
+func TestBackendTLSPolicyConfig(t *testing.T) {
+	tests := []struct {
+		name        string
+		wantErrors  []string
+		routeConfig gatewayv1a2.BackendTLSPolicyConfig
+	}{
+		{
+			name: "valid BackendTLSPolicyConfig with WellKnownCACerts",
+			routeConfig: gatewayv1a2.BackendTLSPolicyConfig{
+				WellKnownCACerts: ptrTo(gatewayv1a2.WellKnownCACertType("System")),
+				Hostname:         "foo.example.com",
+			},
+			wantErrors: []string{},
+		},
+		{
+			name: "valid BackendTLSPolicyConfig with CACertRefs",
+			routeConfig: gatewayv1a2.BackendTLSPolicyConfig{
+				CACertRefs: []v1beta1.LocalObjectReference{
+					{
+						Group: "group",
+						Kind:  "kind",
+						Name:  "name",
+					},
+				},
+				Hostname: "foo.example.com",
+			},
+			wantErrors: []string{},
+		},
+		{
+			name:        "invalid BackendTLSPolicyConfig with missing fields",
+			routeConfig: gatewayv1a2.BackendTLSPolicyConfig{},
+			wantErrors:  []string{"spec.tls.hostname in body should be at least 1 chars long", "must specify either CACertRefs or WellKnownCACerts"},
+		},
+		{
+			name: "invalid BackendTLSPolicyConfig with both CACertRefs and WellKnownCACerts",
+			routeConfig: gatewayv1a2.BackendTLSPolicyConfig{
+				CACertRefs: []v1beta1.LocalObjectReference{
+					{
+						Group: "group",
+						Kind:  "kind",
+						Name:  "name",
+					},
+				},
+				WellKnownCACerts: ptrTo(gatewayv1a2.WellKnownCACertType("System")),
+				Hostname:         "foo.example.com",
+			},
+
+			wantErrors: []string{"must not contain both CACertRefs and WellKnownCACerts"},
+		},
+		{
+			name: "invalid BackendTLSPolicyConfig with Unsupported value for WellKnownCACerts",
+			routeConfig: gatewayv1a2.BackendTLSPolicyConfig{
+				WellKnownCACerts: ptrTo(gatewayv1a2.WellKnownCACertType("bar")),
+				Hostname:         "foo.example.com",
+			},
+			wantErrors: []string{"supported values: \"System\""},
+		},
+		{
+			name: "invalid BackendTLSPolicyConfig with empty Hostname field",
+			routeConfig: gatewayv1a2.BackendTLSPolicyConfig{
+				CACertRefs: []v1beta1.LocalObjectReference{
+					{
+						Group: "group",
+						Kind:  "kind",
+						Name:  "name",
+					},
+				},
+				Hostname: "",
+			},
+			wantErrors: []string{"spec.tls.hostname in body should be at least 1 chars long"},
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			route := &gatewayv1a2.BackendTLSPolicy{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      fmt.Sprintf("foo-%v", time.Now().UnixNano()),
+					Namespace: metav1.NamespaceDefault,
+				},
+				Spec: gatewayv1a2.BackendTLSPolicySpec{
+					TargetRef: gatewayv1a2.PolicyTargetReferenceWithSectionName{
+						PolicyTargetReference: gatewayv1a2.PolicyTargetReference{
+							Group:     "group",
+							Kind:      "kind",
+							Name:      "name",
+							Namespace: ptrTo(gatewayv1a2.Namespace("ns")),
+						},
+					},
+					TLS: tc.routeConfig,
+				},
+			}
+			validateBackendTLSPolicy(t, route, tc.wantErrors)
+		})
+	}
+}
+
+func validateBackendTLSPolicy(t *testing.T, route *gatewayv1a2.BackendTLSPolicy, wantErrors []string) {
+	t.Helper()
+
+	ctx := context.Background()
+	err := k8sClient.Create(ctx, route)
+
+	if (len(wantErrors) != 0) != (err != nil) {
+		t.Fatalf("Unexpected response while creating BackendTLSPolicy %q; got err=\n%v\n;want error=%v", fmt.Sprintf("%v/%v", route.Namespace, route.Name), err, wantErrors)
+	}
+
+	var missingErrorStrings []string
+	for _, wantError := range wantErrors {
+		if !strings.Contains(strings.ToLower(err.Error()), strings.ToLower(wantError)) {
+			missingErrorStrings = append(missingErrorStrings, wantError)
+		}
+	}
+	if len(missingErrorStrings) != 0 {
+		t.Errorf("Unexpected response while creating BackendTLSPolicy %q; got err=\n%v\n;missing strings within error=%q", fmt.Sprintf("%v/%v", route.Namespace, route.Name), err, missingErrorStrings)
+	}
+}