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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package ledger
import (
"testing"
"time"
"github.com/algorand/go-algorand/data/basics"
"github.com/algorand/go-algorand/test/partitiontest"
"github.com/stretchr/testify/require"
)
const epsilon = 5 * time.Millisecond
func TestBulletin(t *testing.T) {
partitiontest.PartitionTest(t)
bul := makeBulletin()
bul.committedUpTo(1)
<-bul.Wait(1) // Should finish immediately
<-bul.Wait(1) // Should finish immediately
select {
case <-bul.Wait(2):
t.Errorf("<-Wait(2) finished early")
t.FailNow()
default:
// Correct
}
bul.committedUpTo(2)
select {
case <-bul.Wait(2):
// Correct
case <-time.After(epsilon):
t.Errorf("<-Wait(2) finished late")
}
eventSequence := make(chan string, 3)
go func() {
<-bul.Wait(3)
eventSequence <- "A: Finished waiting on 3"
}()
go func() {
<-bul.Wait(3)
eventSequence <- "B: Finished waiting on 3"
}()
go func() {
time.Sleep(epsilon)
eventSequence <- "Notifying 3"
bul.committedUpTo(3)
}()
<-bul.Wait(3)
e1, e2, e3 := <-eventSequence, <-eventSequence, <-eventSequence
if e1 != "Notifying 3" {
t.Errorf("Wrong order: %v, %v, %v", e1, e2, e3)
}
select {
case <-bul.Wait(5):
t.Errorf("<-Wait(5) finished early")
t.FailNow()
default:
// Correct
}
bul.committedUpTo(7)
select {
case <-bul.Wait(6):
// Correct
case <-time.After(epsilon):
t.Errorf("<-Wait(6) finished late")
}
go func() {
time.Sleep(epsilon)
bul.committedUpTo(20)
}()
select {
case <-bul.Wait(10):
// Correct
case <-time.After(time.Second):
t.Errorf("<-Wait(10) finished late")
}
}
func TestCancelWait(t *testing.T) {
partitiontest.PartitionTest(t)
bul := makeBulletin()
// Calling Wait before CancelWait
waitCh := bul.Wait(5)
bul.CancelWait(5)
bul.committedUpTo(5)
select {
case <-waitCh:
t.Errorf("<-Wait(5) should have been cancelled")
case <-time.After(epsilon):
// Correct
}
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(5))
// Calling CancelWait before Wait
bul.CancelWait(6)
select {
case <-bul.Wait(6):
t.Errorf("<-Wait(6) should have been cancelled")
case <-time.After(epsilon):
// Correct
}
require.Contains(t, bul.pendingNotificationRequests, basics.Round(6))
require.Equal(t, bul.pendingNotificationRequests[basics.Round(6)].count, 1)
bul.CancelWait(6)
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(6))
// Two Waits, one cancelled
waitCh1 := bul.Wait(7)
waitCh2 := bul.Wait(7)
require.Equal(t, waitCh1, waitCh2)
bul.CancelWait(7)
select {
case <-waitCh1:
t.Errorf("<-Wait(7) should not be notified yet")
case <-time.After(epsilon):
// Correct
}
// Still one waiter
require.Contains(t, bul.pendingNotificationRequests, basics.Round(7))
require.Equal(t, bul.pendingNotificationRequests[basics.Round(7)].count, 1)
bul.committedUpTo(7)
select {
case <-waitCh1:
// Correct
case <-time.After(epsilon):
t.Errorf("<-Wait(7) should have been notified")
}
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(7))
// Wait followed by Cancel for a round that already completed
waitCh = bul.Wait(5)
bul.CancelWait(5)
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(5))
select {
case <-waitCh:
// Correct
case <-time.After(epsilon):
t.Errorf("<-Wait(5) should have been notified right away")
}
// Cancel Wait after Wait triggered
waitCh = bul.Wait(8)
require.Contains(t, bul.pendingNotificationRequests, basics.Round(8))
require.Equal(t, bul.pendingNotificationRequests[basics.Round(8)].count, 1)
bul.committedUpTo(8)
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(8))
select {
case <-waitCh:
// Correct
case <-time.After(epsilon):
t.Errorf("<-Wait(8) should have been notified")
}
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(8))
bul.CancelWait(8) // should do nothing
// Cancel Wait after Wait triggered, but before Wait returned
waitCh = bul.Wait(9)
require.Contains(t, bul.pendingNotificationRequests, basics.Round(9))
require.Equal(t, bul.pendingNotificationRequests[basics.Round(9)].count, 1)
bul.committedUpTo(9)
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(9))
bul.CancelWait(9) // should do nothing
select {
case <-waitCh:
// Correct
case <-time.After(epsilon):
t.Errorf("<-Wait(9) should have been notified")
}
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(9))
// Two waits, both cancelled
waitCh1 = bul.Wait(10)
waitCh2 = bul.Wait(10)
require.Equal(t, waitCh1, waitCh2)
bul.CancelWait(10)
require.Contains(t, bul.pendingNotificationRequests, basics.Round(10))
require.Equal(t, bul.pendingNotificationRequests[basics.Round(10)].count, 1)
bul.CancelWait(10)
require.NotContains(t, bul.pendingNotificationRequests, basics.Round(10))
}
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