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// Copyright 2024 The Tessera authors. All Rights Reserved.
//
// 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 client_test
import (
"context"
"fmt"
"sync/atomic"
"testing"
"time"
"github.com/transparency-dev/tessera"
"github.com/transparency-dev/tessera/api"
"github.com/transparency-dev/tessera/api/layout"
"github.com/transparency-dev/tessera/client"
"github.com/transparency-dev/tessera/testonly"
)
func TestEntryBundles(t *testing.T) {
ctx := t.Context()
logSize1 := uint64(12345)
logSize2 := uint64(100045)
tl, done := testonly.NewTestLog(t, tessera.NewAppendOptions().WithBatching(30000, time.Second).WithCheckpointInterval(time.Second))
defer func() {
if err := done(ctx); err != nil {
t.Fatalf("done: %v", err)
}
}()
if _, err := populateEntries(t, tl, logSize1, "first"); err != nil {
t.Fatalf("populateEntries(first): %v", err)
}
if _, err := populateEntries(t, tl, logSize2-logSize1, "second"); err != nil {
t.Fatalf("populateEntries(second): %v", err)
}
var logSize atomic.Uint64
logSize.Store(uint64(logSize1))
size := func(ctx context.Context) (uint64, error) {
return logSize.Load(), nil
}
// Finally, try to stream all the bundles back.
// We'll first try to stream up to logSize1, then when we reach it we'll
// make the tree appear to grow to logSize2 to test resuming.
seenEntries := uint64(0)
for gotEntry, gotErr := range client.EntryBundles(ctx, 2, size, tl.LogReader.ReadEntryBundle, 0, uint64(logSize2)) {
if gotErr != nil {
t.Fatalf("gotErr after %d: %v", seenEntries, gotErr)
}
if e := gotEntry.RangeInfo.Index*layout.EntryBundleWidth + uint64(gotEntry.RangeInfo.First); e != seenEntries {
t.Fatalf("got idx %d, want %d", e, seenEntries)
}
seenEntries += uint64(gotEntry.RangeInfo.N)
t.Logf("got RI %d / %d", gotEntry.RangeInfo.Index, seenEntries)
switch seenEntries {
case uint64(logSize1):
// We've fetched all the entries from the original tree size, now we'll make
// the tree appear to have grown to the final size.
// The stream should start returning bundles again until we've consumed them all.
t.Log("Reached logSize, growing tree")
logSize.Store(uint64(logSize2))
time.Sleep(time.Second)
}
}
}
func TestEntries(t *testing.T) {
ctx := t.Context()
logSize := uint64(1234)
tl, done := testonly.NewTestLog(t, tessera.NewAppendOptions().WithBatching(uint(logSize), time.Second).WithCheckpointInterval(time.Second))
defer func() {
if err := done(ctx); err != nil {
t.Fatalf("done: %v", err)
}
}()
// Put some entries into a log.
es, err := populateEntries(t, tl, logSize, "first")
if err != nil {
t.Fatalf("populateEntries(): %v", err)
}
wantEntries := make(map[string]struct{})
for _, e := range es {
wantEntries[string(e)] = struct{}{}
}
unbundle := func(bundle []byte) ([][]byte, error) {
eb := &api.EntryBundle{}
if err := eb.UnmarshalText(bundle); err != nil {
return nil, err
}
return eb.Entries, nil
}
// Now stream back entries and check that we saw all the entries we added above.
eCh := make(chan []byte)
size := func(ctx context.Context) (uint64, error) {
return logSize, nil
}
go func() {
defer close(eCh)
for gotEntry, gotErr := range client.Entries(client.EntryBundles(ctx, 2, size, tl.LogReader.ReadEntryBundle, 0, logSize), unbundle) {
if gotErr != nil {
t.Errorf("gotErr: %v", gotErr)
}
eCh <- gotEntry.Entry
}
}()
for e := range eCh {
k := string(e)
if _, ok := wantEntries[k]; !ok {
t.Errorf("Expected missing entry %q - already seen?", k)
}
delete(wantEntries, k)
}
if l := len(wantEntries); l > 0 {
t.Fatalf("Did not see %d expected entries", l)
}
}
func populateEntries(t *testing.T, tl *testonly.TestLog, N uint64, ep string) ([][]byte, error) {
t.Helper()
es := make([][]byte, 0, N)
fs := make([]tessera.IndexFuture, 0, N)
for i := range N {
e := fmt.Appendf(nil, "%s-%d", ep, i)
es = append(es, e)
fs = append(fs, tl.Appender.Add(t.Context(), tessera.NewEntry(e)))
}
t.Logf("Added %d entries", N)
a := tessera.NewPublicationAwaiter(t.Context(), tl.LogReader.ReadCheckpoint, time.Second)
for _, f := range fs {
if _, _, err := a.Await(t.Context(), f); err != nil {
return nil, err
}
}
return es, nil
}
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