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tendermint/libs/pubsub/pubsub_test.go

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package pubsub_test
import (
"context"
"fmt"
"runtime/debug"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/tendermint/tendermint/libs/log"
"github.com/tendermint/tendermint/libs/pubsub"
"github.com/tendermint/tendermint/libs/pubsub/query"
)
const (
clientID = "test-client"
)
func TestSubscribe(t *testing.T) {
s := pubsub.NewServer()
s.SetLogger(log.TestingLogger())
s.Start()
defer s.Stop()
ctx := context.Background()
ch := make(chan interface{}, 1)
err := s.Subscribe(ctx, clientID, query.Empty{}, ch)
require.NoError(t, err)
err = s.Publish(ctx, "Ka-Zar")
require.NoError(t, err)
assertReceive(t, "Ka-Zar", ch)
err = s.Publish(ctx, "Quicksilver")
require.NoError(t, err)
assertReceive(t, "Quicksilver", ch)
}
func TestDifferentClients(t *testing.T) {
s := pubsub.NewServer()
s.SetLogger(log.TestingLogger())
s.Start()
defer s.Stop()
ctx := context.Background()
ch1 := make(chan interface{}, 1)
err := s.Subscribe(ctx, "client-1", query.MustParse("tm.events.type='NewBlock'"), ch1)
require.NoError(t, err)
err = s.PublishWithTags(ctx, "Iceman", pubsub.NewTagMap(map[string]string{"tm.events.type": "NewBlock"}))
require.NoError(t, err)
assertReceive(t, "Iceman", ch1)
ch2 := make(chan interface{}, 1)
err = s.Subscribe(ctx, "client-2", query.MustParse("tm.events.type='NewBlock' AND abci.account.name='Igor'"), ch2)
require.NoError(t, err)
err = s.PublishWithTags(ctx, "Ultimo", pubsub.NewTagMap(map[string]string{"tm.events.type": "NewBlock", "abci.account.name": "Igor"}))
require.NoError(t, err)
assertReceive(t, "Ultimo", ch1)
assertReceive(t, "Ultimo", ch2)
ch3 := make(chan interface{}, 1)
err = s.Subscribe(ctx, "client-3", query.MustParse("tm.events.type='NewRoundStep' AND abci.account.name='Igor' AND abci.invoice.number = 10"), ch3)
require.NoError(t, err)
err = s.PublishWithTags(ctx, "Valeria Richards", pubsub.NewTagMap(map[string]string{"tm.events.type": "NewRoundStep"}))
require.NoError(t, err)
assert.Zero(t, len(ch3))
}
func TestClientSubscribesTwice(t *testing.T) {
s := pubsub.NewServer()
s.SetLogger(log.TestingLogger())
s.Start()
defer s.Stop()
ctx := context.Background()
q := query.MustParse("tm.events.type='NewBlock'")
ch1 := make(chan interface{}, 1)
err := s.Subscribe(ctx, clientID, q, ch1)
require.NoError(t, err)
err = s.PublishWithTags(ctx, "Goblin Queen", pubsub.NewTagMap(map[string]string{"tm.events.type": "NewBlock"}))
require.NoError(t, err)
assertReceive(t, "Goblin Queen", ch1)
ch2 := make(chan interface{}, 1)
err = s.Subscribe(ctx, clientID, q, ch2)
require.Error(t, err)
err = s.PublishWithTags(ctx, "Spider-Man", pubsub.NewTagMap(map[string]string{"tm.events.type": "NewBlock"}))
require.NoError(t, err)
assertReceive(t, "Spider-Man", ch1)
}
func TestUnsubscribe(t *testing.T) {
s := pubsub.NewServer()
s.SetLogger(log.TestingLogger())
s.Start()
defer s.Stop()
ctx := context.Background()
ch := make(chan interface{})
err := s.Subscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"), ch)
require.NoError(t, err)
err = s.Unsubscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"))
require.NoError(t, err)
err = s.Publish(ctx, "Nick Fury")
require.NoError(t, err)
assert.Zero(t, len(ch), "Should not receive anything after Unsubscribe")
_, ok := <-ch
assert.False(t, ok)
}
func TestResubscribe(t *testing.T) {
s := pubsub.NewServer()
s.SetLogger(log.TestingLogger())
s.Start()
defer s.Stop()
ctx := context.Background()
ch := make(chan interface{})
err := s.Subscribe(ctx, clientID, query.Empty{}, ch)
require.NoError(t, err)
err = s.Unsubscribe(ctx, clientID, query.Empty{})
require.NoError(t, err)
ch = make(chan interface{})
err = s.Subscribe(ctx, clientID, query.Empty{}, ch)
require.NoError(t, err)
err = s.Publish(ctx, "Cable")
require.NoError(t, err)
assertReceive(t, "Cable", ch)
}
func TestUnsubscribeAll(t *testing.T) {
s := pubsub.NewServer()
s.SetLogger(log.TestingLogger())
s.Start()
defer s.Stop()
ctx := context.Background()
ch1, ch2 := make(chan interface{}, 1), make(chan interface{}, 1)
err := s.Subscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"), ch1)
require.NoError(t, err)
err = s.Subscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlockHeader'"), ch2)
require.NoError(t, err)
err = s.UnsubscribeAll(ctx, clientID)
require.NoError(t, err)
err = s.Publish(ctx, "Nick Fury")
require.NoError(t, err)
assert.Zero(t, len(ch1), "Should not receive anything after UnsubscribeAll")
assert.Zero(t, len(ch2), "Should not receive anything after UnsubscribeAll")
_, ok := <-ch1
assert.False(t, ok)
_, ok = <-ch2
assert.False(t, ok)
}
func TestBufferCapacity(t *testing.T) {
s := pubsub.NewServer(pubsub.BufferCapacity(2))
s.SetLogger(log.TestingLogger())
assert.Equal(t, 2, s.BufferCapacity())
ctx := context.Background()
err := s.Publish(ctx, "Nighthawk")
require.NoError(t, err)
err = s.Publish(ctx, "Sage")
require.NoError(t, err)
ctx, cancel := context.WithTimeout(ctx, 10*time.Millisecond)
defer cancel()
err = s.Publish(ctx, "Ironclad")
if assert.Error(t, err) {
assert.Equal(t, context.DeadlineExceeded, err)
}
}
func Benchmark10Clients(b *testing.B) { benchmarkNClients(10, b) }
func Benchmark100Clients(b *testing.B) { benchmarkNClients(100, b) }
func Benchmark1000Clients(b *testing.B) { benchmarkNClients(1000, b) }
func Benchmark10ClientsOneQuery(b *testing.B) { benchmarkNClientsOneQuery(10, b) }
func Benchmark100ClientsOneQuery(b *testing.B) { benchmarkNClientsOneQuery(100, b) }
func Benchmark1000ClientsOneQuery(b *testing.B) { benchmarkNClientsOneQuery(1000, b) }
func benchmarkNClients(n int, b *testing.B) {
s := pubsub.NewServer()
s.Start()
defer s.Stop()
ctx := context.Background()
for i := 0; i < n; i++ {
ch := make(chan interface{})
go func() {
for range ch {
}
}()
s.Subscribe(ctx, clientID, query.MustParse(fmt.Sprintf("abci.Account.Owner = 'Ivan' AND abci.Invoices.Number = %d", i)), ch)
}
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
s.PublishWithTags(ctx, "Gamora", pubsub.NewTagMap(map[string]string{"abci.Account.Owner": "Ivan", "abci.Invoices.Number": string(i)}))
}
}
func benchmarkNClientsOneQuery(n int, b *testing.B) {
s := pubsub.NewServer()
s.Start()
defer s.Stop()
ctx := context.Background()
q := query.MustParse("abci.Account.Owner = 'Ivan' AND abci.Invoices.Number = 1")
for i := 0; i < n; i++ {
ch := make(chan interface{})
go func() {
for range ch {
}
}()
s.Subscribe(ctx, clientID, q, ch)
}
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
s.PublishWithTags(ctx, "Gamora", pubsub.NewTagMap(map[string]string{"abci.Account.Owner": "Ivan", "abci.Invoices.Number": "1"}))
}
}
///////////////////////////////////////////////////////////////////////////////
/// HELPERS
///////////////////////////////////////////////////////////////////////////////
func assertReceive(t *testing.T, expected interface{}, ch <-chan interface{}, msgAndArgs ...interface{}) {
select {
case actual := <-ch:
if actual != nil {
assert.Equal(t, expected, actual, msgAndArgs...)
}
case <-time.After(1 * time.Second):
t.Errorf("Expected to receive %v from the channel, got nothing after 1s", expected)
debug.PrintStack()
}
}