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https://github.com/etcd-io/etcd.git
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4fa07a1c8a
Event histories after merging serve as an authorotative list of events that can be seen as ones persisted by etcd, we don't need PrevValue as part of it. Signed-off-by: Madhav Jivrajani <madhav.jiv@gmail.com>
109 lines
4.0 KiB
Go
109 lines
4.0 KiB
Go
// Copyright 2023 The etcd Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package validate
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import (
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"fmt"
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"sort"
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"testing"
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"github.com/anishathalye/porcupine"
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"github.com/google/go-cmp/cmp"
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"go.uber.org/zap"
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"go.etcd.io/etcd/tests/v3/robustness/model"
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"go.etcd.io/etcd/tests/v3/robustness/report"
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)
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// ValidateAndReturnVisualize returns visualize as porcupine.linearizationInfo used to generate visualization is private.
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func ValidateAndReturnVisualize(t *testing.T, lg *zap.Logger, cfg Config, reports []report.ClientReport) (visualize func(basepath string) error) {
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patchedOperations := patchedOperationHistory(reports)
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linearizable, visualize := validateLinearizableOperationsAndVisualize(lg, patchedOperations)
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if linearizable != porcupine.Ok {
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t.Error("Failed linearization, skipping further validation")
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return visualize
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}
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// TODO: Don't use watch events to get event history.
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eventHistory, err := mergeWatchEventHistory(reports)
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if err != nil {
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t.Errorf("Failed merging watch history to create event history, err: %s", err)
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validateWatch(t, lg, cfg, reports, nil)
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return visualize
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}
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validateWatch(t, lg, cfg, reports, eventHistory)
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validateSerializableOperations(t, lg, patchedOperations, eventHistory)
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return visualize
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}
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type Config struct {
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ExpectRevisionUnique bool
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}
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func mergeWatchEventHistory(reports []report.ClientReport) ([]model.PersistedEvent, error) {
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type revisionEvents struct {
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events []model.PersistedEvent
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revision int64
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clientId int
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}
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revisionToEvents := map[int64]revisionEvents{}
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var lastClientId = 0
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var lastRevision int64
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events := []model.PersistedEvent{}
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for _, r := range reports {
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for _, op := range r.Watch {
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for _, resp := range op.Responses {
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for _, event := range resp.Events {
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if event.Revision == lastRevision && lastClientId == r.ClientId {
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events = append(events, event.PersistedEvent)
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} else {
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if prev, found := revisionToEvents[lastRevision]; found {
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// This assumes that there are txn that would be observed differently by two watches.
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// TODO: Implement merging events from multiple watches about single revision based on operations.
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if diff := cmp.Diff(prev.events, events); diff != "" {
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return nil, fmt.Errorf("events between clients %d and %d don't match, revision: %d, diff: %s", prev.clientId, lastClientId, lastRevision, diff)
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}
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} else {
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revisionToEvents[lastRevision] = revisionEvents{clientId: lastClientId, events: events, revision: lastRevision}
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}
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lastClientId = r.ClientId
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lastRevision = event.Revision
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events = []model.PersistedEvent{event.PersistedEvent}
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}
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}
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}
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}
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}
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if prev, found := revisionToEvents[lastRevision]; found {
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if diff := cmp.Diff(prev.events, events); diff != "" {
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return nil, fmt.Errorf("events between clients %d and %d don't match, revision: %d, diff: %s", prev.clientId, lastClientId, lastRevision, diff)
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}
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} else {
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revisionToEvents[lastRevision] = revisionEvents{clientId: lastClientId, events: events, revision: lastRevision}
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}
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var allRevisionEvents []revisionEvents
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for _, revEvents := range revisionToEvents {
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allRevisionEvents = append(allRevisionEvents, revEvents)
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}
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sort.Slice(allRevisionEvents, func(i, j int) bool {
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return allRevisionEvents[i].revision < allRevisionEvents[j].revision
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})
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var eventHistory []model.PersistedEvent
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for _, revEvents := range allRevisionEvents {
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eventHistory = append(eventHistory, revEvents.events...)
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}
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return eventHistory, nil
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}
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