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471 lines
13 KiB
471 lines
13 KiB
package pubsub_test
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import (
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"context"
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"errors"
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"fmt"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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abci "github.com/tendermint/tendermint/abci/types"
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"github.com/tendermint/tendermint/internal/pubsub"
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"github.com/tendermint/tendermint/internal/pubsub/query"
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"github.com/tendermint/tendermint/libs/log"
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"github.com/tendermint/tendermint/types"
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)
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const (
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clientID = "test-client"
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)
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// pubstring is a trivial implementation of the EventData interface for
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// string-valued test data.
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type pubstring string
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func (pubstring) TypeTag() string { return "pubstring" }
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func TestSubscribeWithArgs(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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t.Run("DefaultLimit", func(t *testing.T) {
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sub := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.All,
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}))
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require.Equal(t, 1, s.NumClients())
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require.Equal(t, 1, s.NumClientSubscriptions(clientID))
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require.NoError(t, s.Publish(ctx, pubstring("Ka-Zar")))
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sub.mustReceive(ctx, pubstring("Ka-Zar"))
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})
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t.Run("PositiveLimit", func(t *testing.T) {
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sub := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID + "-2",
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Query: query.All,
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Limit: 10,
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}))
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require.NoError(t, s.Publish(ctx, pubstring("Aggamon")))
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sub.mustReceive(ctx, pubstring("Aggamon"))
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})
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}
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func TestObserver(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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done := make(chan struct{})
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var got interface{}
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require.NoError(t, s.Observe(ctx, func(msg pubsub.Message) error {
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defer close(done)
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got = msg.Data()
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return nil
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}))
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const input = pubstring("Lions and tigers and bears, oh my!")
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require.NoError(t, s.Publish(ctx, input))
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<-done
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require.Equal(t, got, input)
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}
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func TestObserverErrors(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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require.Error(t, s.Observe(ctx, nil, query.All))
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require.NoError(t, s.Observe(ctx, func(pubsub.Message) error { return nil }))
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require.Error(t, s.Observe(ctx, func(pubsub.Message) error { return nil }, query.All))
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}
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func TestPublishDoesNotBlock(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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sub := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.All,
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}))
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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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require.NoError(t, s.Publish(ctx, pubstring("Quicksilver")))
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require.NoError(t, s.Publish(ctx, pubstring("Asylum")))
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require.NoError(t, s.Publish(ctx, pubstring("Ivan")))
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}()
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select {
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case <-published:
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sub.mustReceive(ctx, pubstring("Quicksilver"))
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sub.mustFail(ctx, pubsub.ErrTerminated)
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case <-time.After(3 * time.Second):
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t.Fatal("Publishing should not have blocked")
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}
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}
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func TestSubscribeErrors(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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t.Run("NegativeLimitErr", func(t *testing.T) {
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_, err := s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.All,
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Limit: -5,
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})
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require.Error(t, err)
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})
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}
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func TestSlowSubscriber(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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sub := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.All,
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}))
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require.NoError(t, s.Publish(ctx, pubstring("Fat Cobra")))
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require.NoError(t, s.Publish(ctx, pubstring("Viper")))
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require.NoError(t, s.Publish(ctx, pubstring("Black Panther")))
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// We had capacity for one item, so we should get that item, but after that
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// the subscription should have been terminated by the publisher.
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sub.mustReceive(ctx, pubstring("Fat Cobra"))
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sub.mustFail(ctx, pubsub.ErrTerminated)
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}
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func TestDifferentClients(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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sub1 := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: "client-1",
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Query: query.MustCompile(`tm.events.type='NewBlock'`),
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}))
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events := []abci.Event{{
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Type: "tm.events",
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Attributes: []abci.EventAttribute{{Key: "type", Value: "NewBlock"}},
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}}
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require.NoError(t, s.PublishWithEvents(ctx, pubstring("Iceman"), events))
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sub1.mustReceive(ctx, pubstring("Iceman"))
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sub2 := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: "client-2",
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Query: query.MustCompile(`tm.events.type='NewBlock' AND abci.account.name='Igor'`),
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}))
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events = []abci.Event{
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{
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Type: "tm.events",
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Attributes: []abci.EventAttribute{{Key: "type", Value: "NewBlock"}},
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},
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{
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Type: "abci.account",
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Attributes: []abci.EventAttribute{{Key: "name", Value: "Igor"}},
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},
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}
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require.NoError(t, s.PublishWithEvents(ctx, pubstring("Ultimo"), events))
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sub1.mustReceive(ctx, pubstring("Ultimo"))
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sub2.mustReceive(ctx, pubstring("Ultimo"))
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sub3 := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: "client-3",
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Query: query.MustCompile(
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`tm.events.type='NewRoundStep' AND abci.account.name='Igor' AND abci.invoice.number = 10`),
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}))
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events = []abci.Event{{
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Type: "tm.events",
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Attributes: []abci.EventAttribute{{Key: "type", Value: "NewRoundStep"}},
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}}
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require.NoError(t, s.PublishWithEvents(ctx, pubstring("Valeria Richards"), events))
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sub3.mustTimeOut(ctx, 100*time.Millisecond)
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}
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func TestSubscribeDuplicateKeys(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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testCases := []struct {
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query string
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expected types.EventData
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}{
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{`withdraw.rewards='17'`, pubstring("Iceman")},
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{`withdraw.rewards='22'`, pubstring("Iceman")},
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{`withdraw.rewards='1' AND withdraw.rewards='22'`, pubstring("Iceman")},
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{`withdraw.rewards='100'`, nil},
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}
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for i, tc := range testCases {
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id := fmt.Sprintf("client-%d", i)
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q := query.MustCompile(tc.query)
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t.Run(id, func(t *testing.T) {
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sub := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: id,
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Query: q,
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}))
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events := []abci.Event{
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{
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Type: "transfer",
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Attributes: []abci.EventAttribute{
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{Key: "sender", Value: "foo"},
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{Key: "sender", Value: "bar"},
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{Key: "sender", Value: "baz"},
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},
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},
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{
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Type: "withdraw",
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Attributes: []abci.EventAttribute{
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{Key: "rewards", Value: "1"},
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{Key: "rewards", Value: "17"},
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{Key: "rewards", Value: "22"},
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},
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},
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}
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require.NoError(t, s.PublishWithEvents(ctx, pubstring("Iceman"), events))
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if tc.expected != nil {
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sub.mustReceive(ctx, tc.expected)
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} else {
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sub.mustTimeOut(ctx, 100*time.Millisecond)
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}
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})
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}
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}
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func TestClientSubscribesTwice(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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q := query.MustCompile(`tm.events.type='NewBlock'`)
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events := []abci.Event{{
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Type: "tm.events",
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Attributes: []abci.EventAttribute{{Key: "type", Value: "NewBlock"}},
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}}
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sub1 := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: q,
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}))
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require.NoError(t, s.PublishWithEvents(ctx, pubstring("Goblin Queen"), events))
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sub1.mustReceive(ctx, pubstring("Goblin Queen"))
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// Subscribing a second time with the same client ID and query fails.
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{
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sub2, err := s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: q,
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})
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require.Error(t, err)
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require.Nil(t, sub2)
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}
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// The attempt to re-subscribe does not disrupt the existing sub.
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require.NoError(t, s.PublishWithEvents(ctx, pubstring("Spider-Man"), events))
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sub1.mustReceive(ctx, pubstring("Spider-Man"))
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}
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func TestUnsubscribe(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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sub := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.MustCompile(`tm.events.type='NewBlock'`),
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}))
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// Removing the subscription we just made should succeed.
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require.NoError(t, s.Unsubscribe(ctx, pubsub.UnsubscribeArgs{
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Subscriber: clientID,
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Query: query.MustCompile(`tm.events.type='NewBlock'`),
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}))
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// Publishing should still work.
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require.NoError(t, s.Publish(ctx, pubstring("Nick Fury")))
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// The unsubscribed subscriber should report as such.
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sub.mustFail(ctx, pubsub.ErrUnsubscribed)
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}
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func TestClientUnsubscribesTwice(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.MustCompile(`tm.events.type='NewBlock'`),
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}))
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require.NoError(t, s.Unsubscribe(ctx, pubsub.UnsubscribeArgs{
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Subscriber: clientID,
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Query: query.MustCompile(`tm.events.type='NewBlock'`),
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}))
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require.ErrorIs(t, s.Unsubscribe(ctx, pubsub.UnsubscribeArgs{
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Subscriber: clientID,
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Query: query.MustCompile(`tm.events.type='NewBlock'`),
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}), pubsub.ErrSubscriptionNotFound)
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require.ErrorIs(t, s.UnsubscribeAll(ctx, clientID), pubsub.ErrSubscriptionNotFound)
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}
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func TestResubscribe(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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args := pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.All,
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}
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newTestSub(t).must(s.SubscribeWithArgs(ctx, args))
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require.NoError(t, s.Unsubscribe(ctx, pubsub.UnsubscribeArgs{
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Subscriber: clientID,
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Query: query.All,
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}))
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sub := newTestSub(t).must(s.SubscribeWithArgs(ctx, args))
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require.NoError(t, s.Publish(ctx, pubstring("Cable")))
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sub.mustReceive(ctx, pubstring("Cable"))
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}
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func TestUnsubscribeAll(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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logger := log.NewNopLogger()
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s := newTestServer(ctx, t, logger)
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sub1 := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.MustCompile(`tm.events.type='NewBlock'`),
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}))
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sub2 := newTestSub(t).must(s.SubscribeWithArgs(ctx, pubsub.SubscribeArgs{
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ClientID: clientID,
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Query: query.MustCompile(`tm.events.type='NewBlockHeader'`),
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}))
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require.NoError(t, s.UnsubscribeAll(ctx, clientID))
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require.NoError(t, s.Publish(ctx, pubstring("Nick Fury")))
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sub1.mustFail(ctx, pubsub.ErrUnsubscribed)
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sub2.mustFail(ctx, pubsub.ErrUnsubscribed)
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}
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func TestBufferCapacity(t *testing.T) {
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logger := log.NewNopLogger()
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s := pubsub.NewServer(logger, pubsub.BufferCapacity(2))
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require.Equal(t, 2, s.BufferCapacity())
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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require.NoError(t, s.Publish(ctx, pubstring("Nighthawk")))
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require.NoError(t, s.Publish(ctx, pubstring("Sage")))
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ctx, cancel = context.WithTimeout(ctx, 100*time.Millisecond)
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defer cancel()
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require.ErrorIs(t, s.Publish(ctx, pubstring("Ironclad")), context.DeadlineExceeded)
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}
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func newTestServer(ctx context.Context, t testing.TB, logger log.Logger) *pubsub.Server {
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t.Helper()
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s := pubsub.NewServer(logger)
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require.NoError(t, s.Start(ctx))
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t.Cleanup(s.Wait)
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return s
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}
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type testSub struct {
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t testing.TB
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*pubsub.Subscription
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}
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func newTestSub(t testing.TB) *testSub { return &testSub{t: t} }
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func (s *testSub) must(sub *pubsub.Subscription, err error) *testSub {
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s.t.Helper()
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require.NoError(s.t, err)
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require.NotNil(s.t, sub)
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s.Subscription = sub
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return s
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}
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func (s *testSub) mustReceive(ctx context.Context, want types.EventData) {
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s.t.Helper()
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got, err := s.Next(ctx)
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require.NoError(s.t, err)
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require.Equal(s.t, want, got.Data())
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}
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func (s *testSub) mustTimeOut(ctx context.Context, dur time.Duration) {
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s.t.Helper()
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tctx, cancel := context.WithTimeout(ctx, dur)
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defer cancel()
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got, err := s.Next(tctx)
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if !errors.Is(err, context.DeadlineExceeded) {
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s.t.Errorf("Next: got (%+v, %v), want %v", got, err, context.DeadlineExceeded)
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}
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}
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func (s *testSub) mustFail(ctx context.Context, want error) {
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s.t.Helper()
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got, err := s.Next(ctx)
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if err == nil && want != nil {
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s.t.Fatalf("Next: got (%+v, %v), want error %v", got, err, want)
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}
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require.ErrorIs(s.t, err, want)
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}
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