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package abcicli_test
import (
"errors"
"fmt"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
abcicli "github.com/tendermint/tendermint/abci/client"
"github.com/tendermint/tendermint/abci/server"
"github.com/tendermint/tendermint/abci/types"
tmrand "github.com/tendermint/tendermint/libs/rand"
"github.com/tendermint/tendermint/libs/service"
)
type errorStopper interface {
StopForError(error)
}
func TestSocketClientStopForErrorDeadlock(t *testing.T) {
c := abcicli.NewSocketClient(":80", false).(errorStopper)
err := errors.New("foo-tendermint")
// See Issue https://github.com/tendermint/abci/issues/114
doneChan := make(chan bool)
go func() {
defer close(doneChan)
c.StopForError(err)
c.StopForError(err)
}()
select {
case <-doneChan:
case <-time.After(time.Second * 4):
t.Fatalf("Test took too long, potential deadlock still exists")
}
}
func TestProperSyncCalls(t *testing.T) {
app := slowApp{}
s, c := setupClientServer(t, app)
defer s.Stop()
defer c.Stop()
resp := make(chan error, 1)
go func() {
// This is BeginBlockSync unrolled....
reqres := c.BeginBlockAsync(types.RequestBeginBlock{})
c.FlushSync()
res := reqres.Response.GetBeginBlock()
require.NotNil(t, res)
resp <- c.Error()
}()
select {
case <-time.After(time.Second):
require.Fail(t, "No response arrived")
case err, ok := <-resp:
require.True(t, ok, "Must not close channel")
assert.NoError(t, err, "This should return success")
}
}
func TestHangingSyncCalls(t *testing.T) {
app := slowApp{}
s, c := setupClientServer(t, app)
defer s.Stop()
defer c.Stop()
resp := make(chan error, 1)
go func() {
// Start BeginBlock and flush it
reqres := c.BeginBlockAsync(types.RequestBeginBlock{})
flush := c.FlushAsync()
// wait 20 ms for all events to travel socket, but
// no response yet from server
time.Sleep(20 * time.Millisecond)
// kill the server, so the connections break
s.Stop()
// wait for the response from BeginBlock
reqres.Wait()
flush.Wait()
resp <- c.Error()
}()
select {
case <-time.After(time.Second):
require.Fail(t, "No response arrived")
case err, ok := <-resp:
require.True(t, ok, "Must not close channel")
assert.Error(t, err, "We should get EOF error")
}
}
func setupClientServer(t *testing.T, app types.Application) (
service.Service, abcicli.Client) {
// some port between 20k and 30k
port := 20000 + tmrand.Int32()%10000
addr := fmt.Sprintf("localhost:%d", port)
s, err := server.NewServer(addr, "socket", app)
require.NoError(t, err)
err = s.Start()
require.NoError(t, err)
c := abcicli.NewSocketClient(addr, true)
err = c.Start()
require.NoError(t, err)
return s, c
}
type slowApp struct {
types.BaseApplication
}
func (slowApp) BeginBlock(req types.RequestBeginBlock) types.ResponseBeginBlock {
time.Sleep(200 * time.Millisecond)
return types.ResponseBeginBlock{}
}