142 lines
3.7 KiB
Go
142 lines
3.7 KiB
Go
/*
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Copyright 2018 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 truncate
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import (
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"strings"
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"testing"
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"github.com/stretchr/testify/require"
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"k8s.io/apimachinery/pkg/runtime"
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auditinternal "k8s.io/apiserver/pkg/apis/audit"
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auditv1beta1 "k8s.io/apiserver/pkg/apis/audit/v1beta1"
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"k8s.io/apiserver/plugin/pkg/audit/fake"
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// Importing just for the schema definitions.
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_ "k8s.io/apiserver/plugin/pkg/audit/webhook"
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)
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var (
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defaultConfig = Config{
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MaxBatchSize: 4 * 1024 * 1024,
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MaxEventSize: 100 * 1024,
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}
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)
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func TestTruncatingEvents(t *testing.T) {
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testCases := []struct {
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desc string
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event *auditinternal.Event
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wantDropped bool
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wantTruncated bool
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}{
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{
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desc: "Empty event should not be truncated",
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event: &auditinternal.Event{},
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},
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{
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desc: "Event with too large body should be truncated",
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event: &auditinternal.Event{
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Level: auditinternal.LevelRequest,
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RequestObject: &runtime.Unknown{
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Raw: []byte("\"" + strings.Repeat("A", int(defaultConfig.MaxEventSize)) + "\""),
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},
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},
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wantTruncated: true,
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},
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{
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desc: "Event with too large metadata should be dropped",
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event: &auditinternal.Event{
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Annotations: map[string]string{
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"key": strings.Repeat("A", int(defaultConfig.MaxEventSize)),
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},
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},
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wantDropped: true,
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},
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}
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for _, tc := range testCases {
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tc := tc
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t.Run(tc.desc, func(t *testing.T) {
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t.Parallel()
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var event *auditinternal.Event
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fb := &fake.Backend{
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OnRequest: func(events []*auditinternal.Event) {
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require.Equal(t, 1, len(events), "Expected single event in batch")
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event = events[0]
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},
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}
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b := NewBackend(fb, defaultConfig, auditv1beta1.SchemeGroupVersion)
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b.ProcessEvents(tc.event)
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require.Equal(t, !tc.wantDropped, event != nil, "Incorrect event presence")
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if tc.wantTruncated {
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require.Equal(t, annotationValue, event.Annotations[annotationKey], "Annotation should be present")
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require.Nil(t, event.RequestObject, "After truncation request should be nil")
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require.Nil(t, event.ResponseObject, "After truncation response should be nil")
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}
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})
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}
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}
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func TestSplittingBatches(t *testing.T) {
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testCases := []struct {
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desc string
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config Config
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events []*auditinternal.Event
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wantBatchCount int
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}{
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{
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desc: "Events fitting in one batch should not be split",
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config: defaultConfig,
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events: []*auditinternal.Event{{}},
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wantBatchCount: 1,
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},
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{
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desc: "Events not fitting in one batch should be split",
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config: Config{
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MaxEventSize: defaultConfig.MaxEventSize,
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MaxBatchSize: 1,
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},
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events: []*auditinternal.Event{
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{Annotations: map[string]string{"key": strings.Repeat("A", int(50))}},
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{Annotations: map[string]string{"key": strings.Repeat("A", int(50))}},
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},
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wantBatchCount: 2,
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},
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}
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for _, tc := range testCases {
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tc := tc
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t.Run(tc.desc, func(t *testing.T) {
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t.Parallel()
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var gotBatchCount int
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fb := &fake.Backend{
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OnRequest: func(events []*auditinternal.Event) {
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gotBatchCount++
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},
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}
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b := NewBackend(fb, tc.config, auditv1beta1.SchemeGroupVersion)
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b.ProcessEvents(tc.events...)
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require.Equal(t, tc.wantBatchCount, gotBatchCount)
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})
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}
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}
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