mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2026-04-16 05:21:01 +02:00
271 lines
7.6 KiB
Go
271 lines
7.6 KiB
Go
/*
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Copyright 2024 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package wrappers
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import (
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"context"
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"net/netip"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"sigs.k8s.io/external-dns/endpoint"
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"sigs.k8s.io/external-dns/internal/testutils"
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"sigs.k8s.io/external-dns/source"
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)
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// Validates that dedupSource is a Source
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var _ source.Source = &nat64Source{}
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func TestNAT64Source(t *testing.T) {
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t.Run("Endpoints", testNat64Source)
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}
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// testDedupEndpoints tests that duplicates from the wrapped source are removed.
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func testNat64Source(t *testing.T) {
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for _, tc := range []struct {
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title string
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endpoints []*endpoint.Endpoint
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expected []*endpoint.Endpoint
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}{
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{
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"single non-nat64 ipv6 endpoint returns one ipv6 endpoint",
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[]*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"2001:db8:1::1"}},
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},
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[]*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"2001:db8:1::1"}},
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},
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},
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{
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"single nat64 ipv6 endpoint returns one ipv4 endpoint and one ipv6 endpoint",
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[]*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"2001:db8::192.0.2.42"}},
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},
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[]*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"2001:db8::192.0.2.42"}},
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"192.0.2.42"}},
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},
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},
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{
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"single nat64 ipv6 endpoint returns one ipv4 endpoint and one ipv6 endpoint",
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[]*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"2001:db8::c000:22a"}},
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},
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[]*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"2001:db8::c000:22a"}},
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"192.0.2.42"}},
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},
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},
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} {
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t.Run(tc.title, func(t *testing.T) {
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mockSource := new(testutils.MockSource)
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mockSource.On("Endpoints").Return(tc.endpoints, nil)
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// Create our object under test and get the endpoints.
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source, err := NewNAT64Source(mockSource, []string{"2001:DB8::/96"})
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require.NoError(t, err)
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endpoints, err := source.Endpoints(context.Background())
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require.NoError(t, err)
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// Validate returned endpoints against desired endpoints.
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validateEndpoints(t, endpoints, tc.expected)
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// Validate that the mock source was called.
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mockSource.AssertExpectations(t)
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})
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}
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}
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func TestNat64Source_AddEventHandler(t *testing.T) {
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tests := []struct {
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title string
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input []string
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times int
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}{
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{
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title: "should add event handler when prefixes are provided",
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input: []string{"2001:DB8::/96"},
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times: 1,
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},
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{
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title: "should add event handler when prefixes not provided",
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input: []string{},
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times: 1,
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},
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}
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for _, tt := range tests {
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t.Run(tt.title, func(t *testing.T) {
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mockSource := testutils.NewMockSource()
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src, err := NewNAT64Source(mockSource, tt.input)
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require.NoError(t, err)
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src.AddEventHandler(t.Context(), func() {})
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mockSource.AssertNumberOfCalls(t, "AddEventHandler", tt.times)
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})
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}
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}
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func TestNewNAT64Source(t *testing.T) {
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type args struct {
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source source.Source
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nat64Prefixes []string
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}
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tests := []struct {
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name string
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args args
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want source.Source
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wantErr bool
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}{
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{
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name: "empty NAT64 prefixes should succeed",
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args: args{
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source: &testutils.MockSource{},
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nat64Prefixes: []string{},
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},
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want: &nat64Source{source: &testutils.MockSource{}, nat64Prefixes: []netip.Prefix{}},
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},
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{
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name: "multiple valid NAT64 prefixes should succeed",
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args: args{
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source: &testutils.MockSource{},
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nat64Prefixes: []string{"2001:db8::/96", "64:ff9b::/96"},
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},
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want: &nat64Source{source: &testutils.MockSource{}, nat64Prefixes: []netip.Prefix{netip.MustParsePrefix("2001:db8::/96"), netip.MustParsePrefix("64:ff9b::/96")}},
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},
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{
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name: "invalid NAT64 prefix should fail",
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args: args{
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source: &testutils.MockSource{},
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nat64Prefixes: []string{"invalid-prefix"},
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},
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wantErr: true,
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},
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{
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name: "NAT64 prefix with wrong mask length should fail",
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args: args{
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source: &testutils.MockSource{},
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nat64Prefixes: []string{"2001:db8::/64"},
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},
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wantErr: true,
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},
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{
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name: "IPv4 address as NAT64 prefix should fail",
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args: args{
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source: &testutils.MockSource{},
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nat64Prefixes: []string{"192.0.2.0/24"},
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},
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wantErr: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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src, err := NewNAT64Source(tt.args.source, tt.args.nat64Prefixes)
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if tt.wantErr {
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assert.Error(t, err)
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} else {
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assert.NoError(t, err)
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}
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assert.Equal(t, tt.want, src)
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})
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}
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}
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func TestNat64SourceEndpoints_VariousCases(t *testing.T) {
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tests := []struct {
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name string
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mockReturn []*endpoint.Endpoint
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mockError error
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setup func()
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asserts func([]*endpoint.Endpoint, error)
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}{
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{
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name: "expect source error propagation",
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mockError: assert.AnError,
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asserts: func(eps []*endpoint.Endpoint, err error) {
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assert.Nil(t, eps)
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require.Error(t, err)
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require.ErrorIs(t, err, assert.AnError)
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},
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},
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{
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name: "skip nat64 processing for non-AAAA records",
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mockReturn: []*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeA, Targets: endpoint.Targets{"10.10.10.11"}},
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},
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asserts: func(eps []*endpoint.Endpoint, err error) {
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assert.NotNil(t, eps)
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assert.Len(t, eps, 1)
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require.NoError(t, err)
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},
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},
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{
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name: "target is not a valid IPv6 address",
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mockReturn: []*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"not-an-ip"}},
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},
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asserts: func(eps []*endpoint.Endpoint, err error) {
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assert.Nil(t, eps)
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require.Error(t, err)
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assert.EqualError(t, err, "ParseAddr(\"not-an-ip\"): unable to parse IP")
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},
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},
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{
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name: "addr from slice fails",
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mockReturn: []*endpoint.Endpoint{
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{DNSName: "foo.example.org", RecordType: endpoint.RecordTypeAAAA, Targets: endpoint.Targets{"2001:db8::192.0.2.42"}},
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},
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setup: func() {
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originalAddrFromSlice := addrFromSlice
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addrFromSlice = func([]byte) (netip.Addr, bool) {
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return netip.Addr{}, false
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}
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t.Cleanup(func() {
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addrFromSlice = originalAddrFromSlice
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})
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},
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asserts: func(eps []*endpoint.Endpoint, err error) {
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assert.Nil(t, eps)
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require.Error(t, err)
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assert.EqualError(t, err, "could not parse [192 0 2 42] to IPv4 address")
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},
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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if tc.setup != nil {
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tc.setup()
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}
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mockSource := new(testutils.MockSource)
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mockSource.On("Endpoints").Return(tc.mockReturn, tc.mockError)
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src, err := NewNAT64Source(mockSource, []string{"2001:db8::/96"})
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require.NoError(t, err)
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eps, err := src.Endpoints(context.Background())
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tc.asserts(eps, err)
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mockSource.AssertExpectations(t)
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})
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}
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}
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