cloudflared-mirror/h2mux/activestreammap_test.go

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package h2mux
import (
"sync"
"testing"
"github.com/stretchr/testify/assert"
)
func TestShutdown(t *testing.T) {
const numStreams = 1000
m := newActiveStreamMap(true, NewActiveStreamsMetrics("test", t.Name()))
// Add all the streams
{
var wg sync.WaitGroup
wg.Add(numStreams)
for i := 0; i < numStreams; i++ {
go func(streamID int) {
defer wg.Done()
stream := &MuxedStream{streamID: uint32(streamID)}
ok := m.Set(stream)
assert.True(t, ok)
}(i)
}
wg.Wait()
}
assert.Equal(t, numStreams, m.Len(), "All the streams should have been added")
shutdownChan, alreadyInProgress := m.Shutdown()
select {
case <-shutdownChan:
assert.Fail(t, "before Shutdown(), shutdownChan shouldn't be closed")
default:
}
assert.False(t, alreadyInProgress)
shutdownChan2, alreadyInProgress2 := m.Shutdown()
assert.Equal(t, shutdownChan, shutdownChan2, "repeated calls to Shutdown() should return the same channel")
assert.True(t, alreadyInProgress2, "repeated calls to Shutdown() should return true for 'in progress'")
// Delete all the streams
{
var wg sync.WaitGroup
wg.Add(numStreams)
for i := 0; i < numStreams; i++ {
go func(streamID int) {
defer wg.Done()
m.Delete(uint32(streamID))
}(i)
}
wg.Wait()
}
assert.Equal(t, 0, m.Len(), "All the streams should have been deleted")
select {
case <-shutdownChan:
default:
assert.Fail(t, "After all the streams are deleted, shutdownChan should have been closed")
}
}
func TestEmptyBeforeShutdown(t *testing.T) {
const numStreams = 1000
m := newActiveStreamMap(true, NewActiveStreamsMetrics("test", t.Name()))
// Add all the streams
{
var wg sync.WaitGroup
wg.Add(numStreams)
for i := 0; i < numStreams; i++ {
go func(streamID int) {
defer wg.Done()
stream := &MuxedStream{streamID: uint32(streamID)}
ok := m.Set(stream)
assert.True(t, ok)
}(i)
}
wg.Wait()
}
assert.Equal(t, numStreams, m.Len(), "All the streams should have been added")
// Delete all the streams, bringing m to size 0
{
var wg sync.WaitGroup
wg.Add(numStreams)
for i := 0; i < numStreams; i++ {
go func(streamID int) {
defer wg.Done()
m.Delete(uint32(streamID))
}(i)
}
wg.Wait()
}
assert.Equal(t, 0, m.Len(), "All the streams should have been deleted")
// Add one stream back
const soloStreamID = uint32(0)
ok := m.Set(&MuxedStream{streamID: soloStreamID})
assert.True(t, ok)
shutdownChan, alreadyInProgress := m.Shutdown()
select {
case <-shutdownChan:
assert.Fail(t, "before Shutdown(), shutdownChan shouldn't be closed")
default:
}
assert.False(t, alreadyInProgress)
shutdownChan2, alreadyInProgress2 := m.Shutdown()
assert.Equal(t, shutdownChan, shutdownChan2, "repeated calls to Shutdown() should return the same channel")
assert.True(t, alreadyInProgress2, "repeated calls to Shutdown() should return true for 'in progress'")
// Remove the remaining stream
m.Delete(soloStreamID)
select {
case <-shutdownChan:
default:
assert.Fail(t, "After all the streams are deleted, shutdownChan should have been closed")
}
}
type noopBuffer struct {
isClosed bool
}
func (t *noopBuffer) Read(p []byte) (n int, err error) { return len(p), nil }
func (t *noopBuffer) Write(p []byte) (n int, err error) { return len(p), nil }
func (t *noopBuffer) Reset() {}
func (t *noopBuffer) Len() int { return 0 }
func (t *noopBuffer) Close() error { t.isClosed = true; return nil }
func (t *noopBuffer) Closed() bool { return t.isClosed }
type noopReadyList struct{}
func (_ *noopReadyList) Signal(streamID uint32) {}
func TestAbort(t *testing.T) {
const numStreams = 1000
m := newActiveStreamMap(true, NewActiveStreamsMetrics("test", t.Name()))
var openedStreams sync.Map
// Add all the streams
{
var wg sync.WaitGroup
wg.Add(numStreams)
for i := 0; i < numStreams; i++ {
go func(streamID int) {
defer wg.Done()
stream := &MuxedStream{
streamID: uint32(streamID),
readBuffer: &noopBuffer{},
writeBuffer: &noopBuffer{},
readyList: &noopReadyList{},
}
ok := m.Set(stream)
assert.True(t, ok)
openedStreams.Store(stream.streamID, stream)
}(i)
}
wg.Wait()
}
assert.Equal(t, numStreams, m.Len(), "All the streams should have been added")
shutdownChan, alreadyInProgress := m.Shutdown()
select {
case <-shutdownChan:
assert.Fail(t, "before Abort(), shutdownChan shouldn't be closed")
default:
}
assert.False(t, alreadyInProgress)
m.Abort()
assert.Equal(t, numStreams, m.Len(), "Abort() shouldn't delete any streams")
openedStreams.Range(func(key interface{}, value interface{}) bool {
stream := value.(*MuxedStream)
readBuffer := stream.readBuffer.(*noopBuffer)
writeBuffer := stream.writeBuffer.(*noopBuffer)
return assert.True(t, readBuffer.isClosed && writeBuffer.isClosed, "Abort() should have closed all the streams")
})
select {
case <-shutdownChan:
default:
assert.Fail(t, "after Abort(), shutdownChan should have been closed")
}
// multiple aborts shouldn't cause any issues
m.Abort()
m.Abort()
m.Abort()
}