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package quic
import (
"context"
"testing"
"time"
"github.com/quic-go/quic-go/internal/utils"
"github.com/quic-go/quic-go/internal/wire"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestDatagramQueuePeekAndPop(t *testing.T) {
var queued []struct{}
queue := newDatagramQueue(func() { queued = append(queued, struct{}{}) }, utils.DefaultLogger)
require.Nil(t, queue.Peek())
require.Empty(t, queued)
require.NoError(t, queue.Add(&wire.DatagramFrame{Data: []byte("foo")}))
require.Len(t, queued, 1)
require.Equal(t, &wire.DatagramFrame{Data: []byte("foo")}, queue.Peek())
// calling peek again returns the same datagram
require.Equal(t, &wire.DatagramFrame{Data: []byte("foo")}, queue.Peek())
queue.Pop()
require.Nil(t, queue.Peek())
}
func TestDatagramQueueSendQueueLength(t *testing.T) {
queue := newDatagramQueue(func() {}, utils.DefaultLogger)
for i := 0; i < maxDatagramSendQueueLen; i++ {
require.NoError(t, queue.Add(&wire.DatagramFrame{Data: []byte{0}}))
}
errChan := make(chan error, 1)
go func() { errChan <- queue.Add(&wire.DatagramFrame{Data: []byte("foobar")}) }()
select {
case <-errChan:
t.Fatal("expected to not receive error")
case <-time.After(scaleDuration(10 * time.Millisecond)):
}
// peeking doesn't remove the datagram from the queue...
require.NotNil(t, queue.Peek())
select {
case <-errChan:
t.Fatal("expected to not receive error")
case <-time.After(scaleDuration(10 * time.Millisecond)):
}
// ...but popping does
queue.Pop()
select {
case err := <-errChan:
require.NoError(t, err)
case <-time.After(time.Second):
t.Fatal("timeout")
}
// pop all the remaining datagrams
for i := 1; i < maxDatagramSendQueueLen; i++ {
queue.Pop()
}
f := queue.Peek()
require.NotNil(t, f)
require.Equal(t, &wire.DatagramFrame{Data: []byte("foobar")}, f)
}
func TestDatagramQueueReceive(t *testing.T) {
queue := newDatagramQueue(func() {}, utils.DefaultLogger)
// receive frames that were received earlier
queue.HandleDatagramFrame(&wire.DatagramFrame{Data: []byte("foo")})
queue.HandleDatagramFrame(&wire.DatagramFrame{Data: []byte("bar")})
data, err := queue.Receive(context.Background())
require.NoError(t, err)
require.Equal(t, []byte("foo"), data)
data, err = queue.Receive(context.Background())
require.NoError(t, err)
require.Equal(t, []byte("bar"), data)
}
func TestDatagramQueueReceiveBlocking(t *testing.T) {
queue := newDatagramQueue(func() {}, utils.DefaultLogger)
// block until a new frame is received
type result struct {
data []byte
err error
}
resultChan := make(chan result, 1)
go func() {
data, err := queue.Receive(context.Background())
resultChan <- result{data, err}
}()
select {
case <-resultChan:
t.Fatal("expected to not receive result")
case <-time.After(scaleDuration(10 * time.Millisecond)):
}
queue.HandleDatagramFrame(&wire.DatagramFrame{Data: []byte("foobar")})
select {
case result := <-resultChan:
require.NoError(t, result.err)
require.Equal(t, []byte("foobar"), result.data)
case <-time.After(time.Second):
t.Fatal("timeout")
}
// unblock when the context is canceled
ctx, cancel := context.WithCancel(context.Background())
errChan := make(chan error, 1)
go func() {
_, err := queue.Receive(ctx)
errChan <- err
}()
select {
case <-errChan:
t.Fatal("expected to not receive error")
case <-time.After(scaleDuration(10 * time.Millisecond)):
}
cancel()
select {
case err := <-errChan:
require.ErrorIs(t, err, context.Canceled)
case <-time.After(time.Second):
t.Fatal("timeout")
}
}
func TestDatagramQueueClose(t *testing.T) {
queue := newDatagramQueue(func() {}, utils.DefaultLogger)
for i := 0; i < maxDatagramSendQueueLen; i++ {
require.NoError(t, queue.Add(&wire.DatagramFrame{Data: []byte{0}}))
}
errChan1 := make(chan error, 1)
go func() { errChan1 <- queue.Add(&wire.DatagramFrame{Data: []byte("foobar")}) }()
errChan2 := make(chan error, 1)
go func() {
_, err := queue.Receive(context.Background())
errChan2 <- err
}()
queue.CloseWithError(assert.AnError)
select {
case err := <-errChan1:
require.ErrorIs(t, err, assert.AnError)
case <-time.After(time.Second):
t.Fatal("timeout")
}
select {
case err := <-errChan2:
require.ErrorIs(t, err, assert.AnError)
case <-time.After(time.Second):
t.Fatal("timeout")
}
}
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