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368 lines
10 KiB
368 lines
10 KiB
package pubsub_test
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import (
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"context"
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"fmt"
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"runtime/debug"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/tendermint/tendermint/libs/log"
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"github.com/tendermint/tendermint/libs/pubsub"
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"github.com/tendermint/tendermint/libs/pubsub/query"
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)
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const (
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clientID = "test-client"
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)
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func TestSubscribe(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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subscription, err := s.Subscribe(ctx, clientID, query.Empty{})
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require.NoError(t, err)
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assert.Equal(t, 1, s.NumClients())
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assert.Equal(t, 1, s.NumClientSubscriptions(clientID))
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err = s.Publish(ctx, "Ka-Zar")
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require.NoError(t, err)
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assertReceive(t, "Ka-Zar", subscription.Out())
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published := make(chan struct{})
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go func() {
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defer close(published)
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err := s.Publish(ctx, "Quicksilver")
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assert.NoError(t, err)
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err = s.Publish(ctx, "Asylum")
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assert.NoError(t, err)
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err = s.Publish(ctx, "Ivan")
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assert.NoError(t, err)
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}()
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select {
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case <-published:
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assertReceive(t, "Quicksilver", subscription.Out())
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assertCancelled(t, subscription, pubsub.ErrOutOfCapacity)
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case <-time.After(3 * time.Second):
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t.Fatal("Expected Publish(Asylum) not to block")
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}
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}
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func TestSubscribeWithCapacity(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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assert.Panics(t, func() {
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s.Subscribe(ctx, clientID, query.Empty{}, -1)
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})
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assert.Panics(t, func() {
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s.Subscribe(ctx, clientID, query.Empty{}, 0)
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})
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subscription, err := s.Subscribe(ctx, clientID, query.Empty{}, 1)
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require.NoError(t, err)
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err = s.Publish(ctx, "Aggamon")
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require.NoError(t, err)
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assertReceive(t, "Aggamon", subscription.Out())
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}
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func TestSubscribeUnbuffered(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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subscription, err := s.SubscribeUnbuffered(ctx, clientID, query.Empty{})
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require.NoError(t, err)
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published := make(chan struct{})
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go func() {
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defer close(published)
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err := s.Publish(ctx, "Ultron")
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assert.NoError(t, err)
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err = s.Publish(ctx, "Darkhawk")
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assert.NoError(t, err)
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}()
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select {
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case <-published:
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t.Fatal("Expected Publish(Darkhawk) to block")
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case <-time.After(3 * time.Second):
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assertReceive(t, "Ultron", subscription.Out())
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assertReceive(t, "Darkhawk", subscription.Out())
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}
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}
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func TestSlowClientIsRemovedWithErrOutOfCapacity(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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subscription, err := s.Subscribe(ctx, clientID, query.Empty{})
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require.NoError(t, err)
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err = s.Publish(ctx, "Fat Cobra")
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require.NoError(t, err)
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err = s.Publish(ctx, "Viper")
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require.NoError(t, err)
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assertCancelled(t, subscription, pubsub.ErrOutOfCapacity)
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}
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func TestDifferentClients(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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subscription1, err := s.Subscribe(ctx, "client-1", query.MustParse("tm.events.type='NewBlock'"))
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require.NoError(t, err)
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err = s.PublishWithTags(ctx, "Iceman", map[string]string{"tm.events.type": "NewBlock"})
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require.NoError(t, err)
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assertReceive(t, "Iceman", subscription1.Out())
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subscription2, err := s.Subscribe(ctx, "client-2", query.MustParse("tm.events.type='NewBlock' AND abci.account.name='Igor'"))
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require.NoError(t, err)
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err = s.PublishWithTags(ctx, "Ultimo", map[string]string{"tm.events.type": "NewBlock", "abci.account.name": "Igor"})
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require.NoError(t, err)
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assertReceive(t, "Ultimo", subscription1.Out())
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assertReceive(t, "Ultimo", subscription2.Out())
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subscription3, err := s.Subscribe(ctx, "client-3", query.MustParse("tm.events.type='NewRoundStep' AND abci.account.name='Igor' AND abci.invoice.number = 10"))
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require.NoError(t, err)
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err = s.PublishWithTags(ctx, "Valeria Richards", map[string]string{"tm.events.type": "NewRoundStep"})
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require.NoError(t, err)
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assert.Zero(t, len(subscription3.Out()))
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}
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func TestClientSubscribesTwice(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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q := query.MustParse("tm.events.type='NewBlock'")
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subscription1, err := s.Subscribe(ctx, clientID, q)
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require.NoError(t, err)
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err = s.PublishWithTags(ctx, "Goblin Queen", map[string]string{"tm.events.type": "NewBlock"})
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require.NoError(t, err)
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assertReceive(t, "Goblin Queen", subscription1.Out())
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subscription2, err := s.Subscribe(ctx, clientID, q)
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require.Error(t, err)
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require.Nil(t, subscription2)
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err = s.PublishWithTags(ctx, "Spider-Man", map[string]string{"tm.events.type": "NewBlock"})
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require.NoError(t, err)
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assertReceive(t, "Spider-Man", subscription1.Out())
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}
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func TestUnsubscribe(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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subscription, err := s.Subscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"))
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require.NoError(t, err)
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err = s.Unsubscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"))
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require.NoError(t, err)
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err = s.Publish(ctx, "Nick Fury")
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require.NoError(t, err)
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assert.Zero(t, len(subscription.Out()), "Should not receive anything after Unsubscribe")
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assertCancelled(t, subscription, pubsub.ErrUnsubscribed)
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}
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func TestClientUnsubscribesTwice(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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_, err := s.Subscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"))
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require.NoError(t, err)
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err = s.Unsubscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"))
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require.NoError(t, err)
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err = s.Unsubscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"))
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assert.Equal(t, pubsub.ErrSubscriptionNotFound, err)
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err = s.UnsubscribeAll(ctx, clientID)
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assert.Equal(t, pubsub.ErrSubscriptionNotFound, err)
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}
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func TestResubscribe(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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subscription, err := s.Subscribe(ctx, clientID, query.Empty{})
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require.NoError(t, err)
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err = s.Unsubscribe(ctx, clientID, query.Empty{})
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require.NoError(t, err)
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subscription, err = s.Subscribe(ctx, clientID, query.Empty{})
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require.NoError(t, err)
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err = s.Publish(ctx, "Cable")
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require.NoError(t, err)
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assertReceive(t, "Cable", subscription.Out())
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}
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func TestUnsubscribeAll(t *testing.T) {
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s := pubsub.NewServer()
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s.SetLogger(log.TestingLogger())
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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subscription1, err := s.Subscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlock'"))
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require.NoError(t, err)
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subscription2, err := s.Subscribe(ctx, clientID, query.MustParse("tm.events.type='NewBlockHeader'"))
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require.NoError(t, err)
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err = s.UnsubscribeAll(ctx, clientID)
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require.NoError(t, err)
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err = s.Publish(ctx, "Nick Fury")
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require.NoError(t, err)
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assert.Zero(t, len(subscription1.Out()), "Should not receive anything after UnsubscribeAll")
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assert.Zero(t, len(subscription2.Out()), "Should not receive anything after UnsubscribeAll")
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assertCancelled(t, subscription1, pubsub.ErrUnsubscribed)
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assertCancelled(t, subscription2, pubsub.ErrUnsubscribed)
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}
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func TestBufferCapacity(t *testing.T) {
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s := pubsub.NewServer(pubsub.BufferCapacity(2))
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s.SetLogger(log.TestingLogger())
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assert.Equal(t, 2, s.BufferCapacity())
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ctx := context.Background()
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err := s.Publish(ctx, "Nighthawk")
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require.NoError(t, err)
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err = s.Publish(ctx, "Sage")
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require.NoError(t, err)
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ctx, cancel := context.WithTimeout(ctx, 10*time.Millisecond)
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defer cancel()
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err = s.Publish(ctx, "Ironclad")
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if assert.Error(t, err) {
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assert.Equal(t, context.DeadlineExceeded, err)
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}
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}
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func Benchmark10Clients(b *testing.B) { benchmarkNClients(10, b) }
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func Benchmark100Clients(b *testing.B) { benchmarkNClients(100, b) }
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func Benchmark1000Clients(b *testing.B) { benchmarkNClients(1000, b) }
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func Benchmark10ClientsOneQuery(b *testing.B) { benchmarkNClientsOneQuery(10, b) }
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func Benchmark100ClientsOneQuery(b *testing.B) { benchmarkNClientsOneQuery(100, b) }
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func Benchmark1000ClientsOneQuery(b *testing.B) { benchmarkNClientsOneQuery(1000, b) }
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func benchmarkNClients(n int, b *testing.B) {
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s := pubsub.NewServer()
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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for i := 0; i < n; i++ {
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subscription, err := s.Subscribe(ctx, clientID, query.MustParse(fmt.Sprintf("abci.Account.Owner = 'Ivan' AND abci.Invoices.Number = %d", i)))
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if err != nil {
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b.Fatal(err)
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}
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go func() {
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for {
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select {
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case <-subscription.Out():
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continue
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case <-subscription.Cancelled():
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return
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}
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}
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}()
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}
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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s.PublishWithTags(ctx, "Gamora", map[string]string{"abci.Account.Owner": "Ivan", "abci.Invoices.Number": string(i)})
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}
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}
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func benchmarkNClientsOneQuery(n int, b *testing.B) {
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s := pubsub.NewServer()
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s.Start()
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defer s.Stop()
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ctx := context.Background()
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q := query.MustParse("abci.Account.Owner = 'Ivan' AND abci.Invoices.Number = 1")
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for i := 0; i < n; i++ {
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subscription, err := s.Subscribe(ctx, clientID, q)
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if err != nil {
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b.Fatal(err)
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}
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go func() {
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for {
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select {
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case <-subscription.Out():
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continue
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case <-subscription.Cancelled():
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return
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}
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}
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}()
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}
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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s.PublishWithTags(ctx, "Gamora", map[string]string{"abci.Account.Owner": "Ivan", "abci.Invoices.Number": "1"})
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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/// HELPERS
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///////////////////////////////////////////////////////////////////////////////
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func assertReceive(t *testing.T, expected interface{}, ch <-chan pubsub.Message, msgAndArgs ...interface{}) {
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select {
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case actual := <-ch:
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assert.Equal(t, expected, actual.Data(), msgAndArgs...)
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case <-time.After(1 * time.Second):
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t.Errorf("Expected to receive %v from the channel, got nothing after 1s", expected)
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debug.PrintStack()
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}
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}
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func assertCancelled(t *testing.T, subscription *pubsub.Subscription, err error) {
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_, ok := <-subscription.Cancelled()
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assert.False(t, ok)
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assert.Equal(t, err, subscription.Err())
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}
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