You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
430 lines
13 KiB
430 lines
13 KiB
package events
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
"github.com/stretchr/testify/require"
|
|
|
|
cmn "github.com/tendermint/tendermint/libs/common"
|
|
)
|
|
|
|
// TestAddListenerForEventFireOnce sets up an EventSwitch, subscribes a single
|
|
// listener to an event, and sends a string "data".
|
|
func TestAddListenerForEventFireOnce(t *testing.T) {
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
messages := make(chan EventData)
|
|
evsw.AddListenerForEvent("listener", "event",
|
|
func(data EventData) {
|
|
// test there's no deadlock if we remove the listener inside a callback
|
|
evsw.RemoveListener("listener")
|
|
messages <- data
|
|
})
|
|
go evsw.FireEvent("event", "data")
|
|
received := <-messages
|
|
if received != "data" {
|
|
t.Errorf("message received does not match: %v", received)
|
|
}
|
|
}
|
|
|
|
// TestAddListenerForEventFireMany sets up an EventSwitch, subscribes a single
|
|
// listener to an event, and sends a thousand integers.
|
|
func TestAddListenerForEventFireMany(t *testing.T) {
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
doneSum := make(chan uint64)
|
|
doneSending := make(chan uint64)
|
|
numbers := make(chan uint64, 4)
|
|
// subscribe one listener for one event
|
|
evsw.AddListenerForEvent("listener", "event",
|
|
func(data EventData) {
|
|
numbers <- data.(uint64)
|
|
})
|
|
// collect received events
|
|
go sumReceivedNumbers(numbers, doneSum)
|
|
// go fire events
|
|
go fireEvents(evsw, "event", doneSending, uint64(1))
|
|
checkSum := <-doneSending
|
|
close(numbers)
|
|
eventSum := <-doneSum
|
|
if checkSum != eventSum {
|
|
t.Errorf("not all messages sent were received.\n")
|
|
}
|
|
}
|
|
|
|
// TestAddListenerForDifferentEvents sets up an EventSwitch, subscribes a single
|
|
// listener to three different events and sends a thousand integers for each
|
|
// of the three events.
|
|
func TestAddListenerForDifferentEvents(t *testing.T) {
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
doneSum := make(chan uint64)
|
|
doneSending1 := make(chan uint64)
|
|
doneSending2 := make(chan uint64)
|
|
doneSending3 := make(chan uint64)
|
|
numbers := make(chan uint64, 4)
|
|
// subscribe one listener to three events
|
|
evsw.AddListenerForEvent("listener", "event1",
|
|
func(data EventData) {
|
|
numbers <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener", "event2",
|
|
func(data EventData) {
|
|
numbers <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener", "event3",
|
|
func(data EventData) {
|
|
numbers <- data.(uint64)
|
|
})
|
|
// collect received events
|
|
go sumReceivedNumbers(numbers, doneSum)
|
|
// go fire events
|
|
go fireEvents(evsw, "event1", doneSending1, uint64(1))
|
|
go fireEvents(evsw, "event2", doneSending2, uint64(1))
|
|
go fireEvents(evsw, "event3", doneSending3, uint64(1))
|
|
var checkSum uint64
|
|
checkSum += <-doneSending1
|
|
checkSum += <-doneSending2
|
|
checkSum += <-doneSending3
|
|
close(numbers)
|
|
eventSum := <-doneSum
|
|
if checkSum != eventSum {
|
|
t.Errorf("not all messages sent were received.\n")
|
|
}
|
|
}
|
|
|
|
// TestAddDifferentListenerForDifferentEvents sets up an EventSwitch,
|
|
// subscribes a first listener to three events, and subscribes a second
|
|
// listener to two of those three events, and then sends a thousand integers
|
|
// for each of the three events.
|
|
func TestAddDifferentListenerForDifferentEvents(t *testing.T) {
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
doneSum1 := make(chan uint64)
|
|
doneSum2 := make(chan uint64)
|
|
doneSending1 := make(chan uint64)
|
|
doneSending2 := make(chan uint64)
|
|
doneSending3 := make(chan uint64)
|
|
numbers1 := make(chan uint64, 4)
|
|
numbers2 := make(chan uint64, 4)
|
|
// subscribe two listener to three events
|
|
evsw.AddListenerForEvent("listener1", "event1",
|
|
func(data EventData) {
|
|
numbers1 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener1", "event2",
|
|
func(data EventData) {
|
|
numbers1 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener1", "event3",
|
|
func(data EventData) {
|
|
numbers1 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener2", "event2",
|
|
func(data EventData) {
|
|
numbers2 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener2", "event3",
|
|
func(data EventData) {
|
|
numbers2 <- data.(uint64)
|
|
})
|
|
// collect received events for listener1
|
|
go sumReceivedNumbers(numbers1, doneSum1)
|
|
// collect received events for listener2
|
|
go sumReceivedNumbers(numbers2, doneSum2)
|
|
// go fire events
|
|
go fireEvents(evsw, "event1", doneSending1, uint64(1))
|
|
go fireEvents(evsw, "event2", doneSending2, uint64(1001))
|
|
go fireEvents(evsw, "event3", doneSending3, uint64(2001))
|
|
checkSumEvent1 := <-doneSending1
|
|
checkSumEvent2 := <-doneSending2
|
|
checkSumEvent3 := <-doneSending3
|
|
checkSum1 := checkSumEvent1 + checkSumEvent2 + checkSumEvent3
|
|
checkSum2 := checkSumEvent2 + checkSumEvent3
|
|
close(numbers1)
|
|
close(numbers2)
|
|
eventSum1 := <-doneSum1
|
|
eventSum2 := <-doneSum2
|
|
if checkSum1 != eventSum1 ||
|
|
checkSum2 != eventSum2 {
|
|
t.Errorf("not all messages sent were received for different listeners to different events.\n")
|
|
}
|
|
}
|
|
|
|
func TestAddAndRemoveListenerConcurrency(t *testing.T) {
|
|
var (
|
|
stopInputEvent = false
|
|
roundCount = 2000
|
|
)
|
|
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
done1 := make(chan struct{})
|
|
done2 := make(chan struct{})
|
|
|
|
// Must be executed concurrently to uncover the data race.
|
|
// 1. RemoveListener
|
|
go func() {
|
|
for i := 0; i < roundCount; i++ {
|
|
evsw.RemoveListener("listener")
|
|
}
|
|
close(done1)
|
|
}()
|
|
|
|
// 2. AddListenerForEvent
|
|
go func() {
|
|
for i := 0; i < roundCount; i++ {
|
|
index := i
|
|
evsw.AddListenerForEvent("listener", fmt.Sprintf("event%d", index),
|
|
func(data EventData) {
|
|
t.Errorf("should not run callback for %d.\n", index)
|
|
stopInputEvent = true
|
|
})
|
|
}
|
|
close(done2)
|
|
}()
|
|
|
|
<-done1
|
|
<-done2
|
|
|
|
evsw.RemoveListener("listener") // remove the last listener
|
|
|
|
for i := 0; i < roundCount && !stopInputEvent; i++ {
|
|
evsw.FireEvent(fmt.Sprintf("event%d", i), uint64(1001))
|
|
}
|
|
}
|
|
|
|
// TestAddAndRemoveListener sets up an EventSwitch, subscribes a listener to
|
|
// two events, fires a thousand integers for the first event, then unsubscribes
|
|
// the listener and fires a thousand integers for the second event.
|
|
func TestAddAndRemoveListener(t *testing.T) {
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
doneSum1 := make(chan uint64)
|
|
doneSum2 := make(chan uint64)
|
|
doneSending1 := make(chan uint64)
|
|
doneSending2 := make(chan uint64)
|
|
numbers1 := make(chan uint64, 4)
|
|
numbers2 := make(chan uint64, 4)
|
|
// subscribe two listener to three events
|
|
evsw.AddListenerForEvent("listener", "event1",
|
|
func(data EventData) {
|
|
numbers1 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener", "event2",
|
|
func(data EventData) {
|
|
numbers2 <- data.(uint64)
|
|
})
|
|
// collect received events for event1
|
|
go sumReceivedNumbers(numbers1, doneSum1)
|
|
// collect received events for event2
|
|
go sumReceivedNumbers(numbers2, doneSum2)
|
|
// go fire events
|
|
go fireEvents(evsw, "event1", doneSending1, uint64(1))
|
|
checkSumEvent1 := <-doneSending1
|
|
// after sending all event1, unsubscribe for all events
|
|
evsw.RemoveListener("listener")
|
|
go fireEvents(evsw, "event2", doneSending2, uint64(1001))
|
|
checkSumEvent2 := <-doneSending2
|
|
close(numbers1)
|
|
close(numbers2)
|
|
eventSum1 := <-doneSum1
|
|
eventSum2 := <-doneSum2
|
|
if checkSumEvent1 != eventSum1 ||
|
|
// correct value asserted by preceding tests, suffices to be non-zero
|
|
checkSumEvent2 == uint64(0) ||
|
|
eventSum2 != uint64(0) {
|
|
t.Errorf("not all messages sent were received or unsubscription did not register.\n")
|
|
}
|
|
}
|
|
|
|
// TestRemoveListener does basic tests on adding and removing
|
|
func TestRemoveListener(t *testing.T) {
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
count := 10
|
|
sum1, sum2 := 0, 0
|
|
// add some listeners and make sure they work
|
|
evsw.AddListenerForEvent("listener", "event1",
|
|
func(data EventData) {
|
|
sum1++
|
|
})
|
|
evsw.AddListenerForEvent("listener", "event2",
|
|
func(data EventData) {
|
|
sum2++
|
|
})
|
|
for i := 0; i < count; i++ {
|
|
evsw.FireEvent("event1", true)
|
|
evsw.FireEvent("event2", true)
|
|
}
|
|
assert.Equal(t, count, sum1)
|
|
assert.Equal(t, count, sum2)
|
|
|
|
// remove one by event and make sure it is gone
|
|
evsw.RemoveListenerForEvent("event2", "listener")
|
|
for i := 0; i < count; i++ {
|
|
evsw.FireEvent("event1", true)
|
|
evsw.FireEvent("event2", true)
|
|
}
|
|
assert.Equal(t, count*2, sum1)
|
|
assert.Equal(t, count, sum2)
|
|
|
|
// remove the listener entirely and make sure both gone
|
|
evsw.RemoveListener("listener")
|
|
for i := 0; i < count; i++ {
|
|
evsw.FireEvent("event1", true)
|
|
evsw.FireEvent("event2", true)
|
|
}
|
|
assert.Equal(t, count*2, sum1)
|
|
assert.Equal(t, count, sum2)
|
|
}
|
|
|
|
// TestAddAndRemoveListenersAsync sets up an EventSwitch, subscribes two
|
|
// listeners to three events, and fires a thousand integers for each event.
|
|
// These two listeners serve as the baseline validation while other listeners
|
|
// are randomly subscribed and unsubscribed.
|
|
// More precisely it randomly subscribes new listeners (different from the first
|
|
// two listeners) to one of these three events. At the same time it starts
|
|
// randomly unsubscribing these additional listeners from all events they are
|
|
// at that point subscribed to.
|
|
// NOTE: it is important to run this test with race conditions tracking on,
|
|
// `go test -race`, to examine for possible race conditions.
|
|
func TestRemoveListenersAsync(t *testing.T) {
|
|
evsw := NewEventSwitch()
|
|
err := evsw.Start()
|
|
require.NoError(t, err)
|
|
defer evsw.Stop()
|
|
|
|
doneSum1 := make(chan uint64)
|
|
doneSum2 := make(chan uint64)
|
|
doneSending1 := make(chan uint64)
|
|
doneSending2 := make(chan uint64)
|
|
doneSending3 := make(chan uint64)
|
|
numbers1 := make(chan uint64, 4)
|
|
numbers2 := make(chan uint64, 4)
|
|
// subscribe two listener to three events
|
|
evsw.AddListenerForEvent("listener1", "event1",
|
|
func(data EventData) {
|
|
numbers1 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener1", "event2",
|
|
func(data EventData) {
|
|
numbers1 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener1", "event3",
|
|
func(data EventData) {
|
|
numbers1 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener2", "event1",
|
|
func(data EventData) {
|
|
numbers2 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener2", "event2",
|
|
func(data EventData) {
|
|
numbers2 <- data.(uint64)
|
|
})
|
|
evsw.AddListenerForEvent("listener2", "event3",
|
|
func(data EventData) {
|
|
numbers2 <- data.(uint64)
|
|
})
|
|
// collect received events for event1
|
|
go sumReceivedNumbers(numbers1, doneSum1)
|
|
// collect received events for event2
|
|
go sumReceivedNumbers(numbers2, doneSum2)
|
|
addListenersStress := func() {
|
|
r1 := cmn.NewRand()
|
|
r1.Seed(time.Now().UnixNano())
|
|
for k := uint16(0); k < 400; k++ {
|
|
listenerNumber := r1.Intn(100) + 3
|
|
eventNumber := r1.Intn(3) + 1
|
|
go evsw.AddListenerForEvent(fmt.Sprintf("listener%v", listenerNumber),
|
|
fmt.Sprintf("event%v", eventNumber),
|
|
func(_ EventData) {})
|
|
}
|
|
}
|
|
removeListenersStress := func() {
|
|
r2 := cmn.NewRand()
|
|
r2.Seed(time.Now().UnixNano())
|
|
for k := uint16(0); k < 80; k++ {
|
|
listenerNumber := r2.Intn(100) + 3
|
|
go evsw.RemoveListener(fmt.Sprintf("listener%v", listenerNumber))
|
|
}
|
|
}
|
|
addListenersStress()
|
|
// go fire events
|
|
go fireEvents(evsw, "event1", doneSending1, uint64(1))
|
|
removeListenersStress()
|
|
go fireEvents(evsw, "event2", doneSending2, uint64(1001))
|
|
go fireEvents(evsw, "event3", doneSending3, uint64(2001))
|
|
checkSumEvent1 := <-doneSending1
|
|
checkSumEvent2 := <-doneSending2
|
|
checkSumEvent3 := <-doneSending3
|
|
checkSum := checkSumEvent1 + checkSumEvent2 + checkSumEvent3
|
|
close(numbers1)
|
|
close(numbers2)
|
|
eventSum1 := <-doneSum1
|
|
eventSum2 := <-doneSum2
|
|
if checkSum != eventSum1 ||
|
|
checkSum != eventSum2 {
|
|
t.Errorf("not all messages sent were received.\n")
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Helper functions
|
|
|
|
// sumReceivedNumbers takes two channels and adds all numbers received
|
|
// until the receiving channel `numbers` is closed; it then sends the sum
|
|
// on `doneSum` and closes that channel. Expected to be run in a go-routine.
|
|
func sumReceivedNumbers(numbers, doneSum chan uint64) {
|
|
var sum uint64
|
|
for {
|
|
j, more := <-numbers
|
|
sum += j
|
|
if !more {
|
|
doneSum <- sum
|
|
close(doneSum)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// fireEvents takes an EventSwitch and fires a thousand integers under
|
|
// a given `event` with the integers mootonically increasing from `offset`
|
|
// to `offset` + 999. It additionally returns the addition of all integers
|
|
// sent on `doneChan` for assertion that all events have been sent, and enabling
|
|
// the test to assert all events have also been received.
|
|
func fireEvents(evsw Fireable, event string, doneChan chan uint64,
|
|
offset uint64) {
|
|
var sentSum uint64
|
|
for i := offset; i <= offset+uint64(999); i++ {
|
|
sentSum += i
|
|
evsw.FireEvent(event, i)
|
|
}
|
|
doneChan <- sentSum
|
|
close(doneChan)
|
|
}
|