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frame_sorter_test.go
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package quic
import (
"fmt"
"math"
"testing"
"golang.org/x/exp/rand"
"github.com/quic-go/quic-go/internal/protocol"
"github.com/stretchr/testify/require"
)
type callbackTracker struct {
called *bool
cb func()
}
func (t *callbackTracker) WasCalled() bool { return *t.called }
func getFrameSorterTestCallback(t *testing.T) (func(), callbackTracker) {
var called bool
cb := func() {
if called {
t.Fatal("double free")
}
called = true
}
return cb, callbackTracker{
cb: cb,
called: &called,
}
}
func TestFrameSorterSimpleCases(t *testing.T) {
s := newFrameSorter()
_, data, doneCb := s.Pop()
require.Nil(t, data)
require.Nil(t, doneCb)
// empty frames are ignored
require.NoError(t, s.Push(nil, 0, nil))
_, data, doneCb = s.Pop()
require.Nil(t, data)
require.Nil(t, doneCb)
cb1, t1 := getFrameSorterTestCallback(t)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push([]byte("bar"), 3, cb2))
require.True(t, s.HasMoreData())
require.NoError(t, s.Push([]byte("foo"), 0, cb1))
offset, data, doneCb := s.Pop()
require.Equal(t, []byte("foo"), data)
require.Zero(t, offset)
require.NotNil(t, doneCb)
doneCb()
require.True(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.True(t, s.HasMoreData())
offset, data, doneCb = s.Pop()
require.Equal(t, []byte("bar"), data)
require.Equal(t, protocol.ByteCount(3), offset)
require.NotNil(t, doneCb)
doneCb()
require.True(t, t2.WasCalled())
require.False(t, s.HasMoreData())
// now receive a duplicate
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push([]byte("foo"), 0, cb3))
require.False(t, s.HasMoreData())
require.True(t, t3.WasCalled())
// now receive a later frame that overlaps with the ones we already consumed
cb4, _ := getFrameSorterTestCallback(t)
require.NoError(t, s.Push([]byte("barbaz"), 3, cb4))
require.True(t, s.HasMoreData())
offset, data, _ = s.Pop()
require.Equal(t, protocol.ByteCount(6), offset)
require.Equal(t, []byte("baz"), data)
require.False(t, s.HasMoreData())
}
// Usually, it's not a good idea to test the implementation details.
// However, we need to make sure that the frame sorter handles gaps correctly,
// in particular when overlapping stream data is received.
// This also includes returning buffers that are no longer needed.
func TestFrameSorterGapHandling(t *testing.T) {
getData := func(l protocol.ByteCount) []byte {
b := make([]byte, l)
rand.Read(b)
return b
}
checkQueue := func(t *testing.T, s *frameSorter, m map[protocol.ByteCount][]byte) {
require.Equal(t, len(m), len(s.queue))
for offset, data := range m {
require.Contains(t, s.queue, offset)
require.Equal(t, data, s.queue[offset].Data)
}
}
checkGaps := func(t *testing.T, s *frameSorter, expectedGaps []byteInterval) {
if s.gaps.Len() != len(expectedGaps) {
fmt.Println("Gaps:")
for gap := s.gaps.Front(); gap != nil; gap = gap.Next() {
fmt.Printf("\t%d - %d\n", gap.Value.Start, gap.Value.End)
}
require.Equal(t, len(expectedGaps), s.gaps.Len())
}
var i int
for gap := s.gaps.Front(); gap != nil; gap = gap.Next() {
require.Equal(t, expectedGaps[i], gap.Value)
i++
}
}
// ---xxx--------------
// ++++++
// =>
// ---xxx++++++--------
t.Run("case 1", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(5)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6, cb2)) // 6 - 11
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
6: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 11, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// ---xxx-----------------
// +++++++
// =>
// ---xxx---+++++++--------
t.Run("case 2", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(5)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 10, cb2)) // 10 -15
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
10: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 6, End: 10},
{Start: 15, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// ---xxx----xxxxxx-------
// ++++
// =>
// ---xxx++++xxxxx--------
t.Run("case 3", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f3, 10, cb2)) // 10 - 15
require.NoError(t, s.Push(f2, 6, cb3)) // 6 - 10
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
6: f2,
10: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 15, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ----xxxx-------
// ++++
// =>
// ----xxxx++-----
t.Run("case 4", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(4)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 7
require.NoError(t, s.Push(f2, 5, cb2)) // 5 - 9
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
7: f2[2:],
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 9, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
t.Run("case 4, for long frames", func(t *testing.T) {
s := newFrameSorter()
mult := protocol.ByteCount(math.Ceil(float64(protocol.MinStreamFrameSize) / 2))
f1 := getData(4 * mult)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4 * mult)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3*mult, cb1)) // 3 - 7
require.NoError(t, s.Push(f2, 5*mult, cb2)) // 5 - 9
checkQueue(t, s, map[protocol.ByteCount][]byte{
3 * mult: f1,
7 * mult: f2[2*mult:],
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3 * mult},
{Start: 9 * mult, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// xxxx-------
// ++++
// =>
// xxxx+++-----
t.Run("case 5", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(4)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 0, cb1)) // 0 - 4
require.NoError(t, s.Push(f2, 3, cb2)) // 3 - 7
checkQueue(t, s, map[protocol.ByteCount][]byte{
0: f1,
4: f2[1:],
})
checkGaps(t, s, []byteInterval{
{Start: 7, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
t.Run("case 5, for long frames", func(t *testing.T) {
s := newFrameSorter()
mult := protocol.ByteCount(math.Ceil(float64(protocol.MinStreamFrameSize) / 2))
f1 := getData(4 * mult)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4 * mult)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 0, cb1)) // 0 - 4
require.NoError(t, s.Push(f2, 3*mult, cb2)) // 3 - 7
checkQueue(t, s, map[protocol.ByteCount][]byte{
0: f1,
4 * mult: f2[mult:],
})
checkGaps(t, s, []byteInterval{
{Start: 7 * mult, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// ----xxxx-------
// ++++
// =>
// --++xxxx-------
t.Run("case 6", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(4)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 9
require.NoError(t, s.Push(f2, 3, cb2)) // 3 - 7
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f2[:2],
5: f1,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 9, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
t.Run("case 6, for long frames", func(t *testing.T) {
s := newFrameSorter()
mult := protocol.ByteCount(math.Ceil(float64(protocol.MinStreamFrameSize) / 2))
f1 := getData(4 * mult)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4 * mult)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5*mult, cb1)) // 5 - 9
require.NoError(t, s.Push(f2, 3*mult, cb2)) // 3 - 7
checkQueue(t, s, map[protocol.ByteCount][]byte{
3 * mult: f2[:2*mult],
5 * mult: f1,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3 * mult},
{Start: 9 * mult, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// ---xxx----xxxxxx-------
// ++
// =>
// ---xxx++--xxxxx--------
t.Run("case 7", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(2)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f3, 10, cb2)) // 10 - 15
require.NoError(t, s.Push(f2, 6, cb3)) // 6 - 8
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
6: f2,
10: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 8, End: 10},
{Start: 15, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ---xxx---------xxxxxx--
// ++
// =>
// ---xxx---++----xxxxx--
t.Run("case 8", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(2)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f3, 15, cb2)) // 15 - 20
require.NoError(t, s.Push(f2, 10, cb3)) // 10 - 12
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
10: f2,
15: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 6, End: 10},
{Start: 12, End: 15},
{Start: 20, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ---xxx----xxxxxx-------
// ++
// =>
// ---xxx--++xxxxx--------
t.Run("case 9", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(2)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f3, 10, cb2)) // 10 - 15
require.NoError(t, s.Push(f2, 8, cb3)) // 8 - 10
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
8: f2,
10: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 6, End: 8},
{Start: 15, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ---xxx----=====-------
// +++++++
// =>
// ---xxx++++=====--------
t.Run("case 10", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(5)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(6)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 10, cb2)) // 10 - 15
require.NoError(t, s.Push(f3, 5, cb3)) // 5 - 11
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
6: f3[1:5],
10: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 15, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.True(t, t3.WasCalled())
})
t.Run("case 10, for long frames", func(t *testing.T) {
s := newFrameSorter()
mult := protocol.ByteCount(math.Ceil(float64(protocol.MinStreamFrameSize) / 4))
f1 := getData(3 * mult)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(5 * mult)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(6 * mult)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3*mult, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 10*mult, cb2)) // 10 - 15
require.NoError(t, s.Push(f3, 5*mult, cb3)) // 5 - 11
checkQueue(t, s, map[protocol.ByteCount][]byte{
3 * mult: f1,
6 * mult: f3[mult : 5*mult],
10 * mult: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3 * mult},
{Start: 15 * mult, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ---xxxx----=====-------
// ++++++
// =>
// ---xxx++++=====--------
t.Run("case 11", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(4)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(5)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 7
require.NoError(t, s.Push(f2, 10, cb2)) // 10 - 15
require.NoError(t, s.Push(f3, 5, cb3)) // 5 - 10
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
7: f3[2:],
10: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 15, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.True(t, t3.WasCalled())
})
// ---xxxx----=====-------
// ++++++
// =>
// ---xxx++++=====--------
t.Run("case 11, for long frames", func(t *testing.T) {
s := newFrameSorter()
mult := protocol.ByteCount(math.Ceil(float64(protocol.MinStreamFrameSize) / 3))
f1 := getData(4 * mult)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(5 * mult)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5 * mult)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3*mult, cb1)) // 3 - 7
require.NoError(t, s.Push(f2, 10*mult, cb2)) // 10 - 15
require.NoError(t, s.Push(f3, 5*mult, cb3)) // 5 - 10
checkQueue(t, s, map[protocol.ByteCount][]byte{
3 * mult: f1,
7 * mult: f3[2*mult:],
10 * mult: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3 * mult},
{Start: 15 * mult, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ----xxxx-------
// +++++++
// =>
// ----+++++++-----
t.Run("case 12", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(4)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(7)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 7
require.NoError(t, s.Push(f2, 3, cb2)) // 3 - 10
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 10, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// ----xxx===-------
// +++++++
// =>
// ----+++++++-----
t.Run("case 13", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(3)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(7)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6, cb2)) // 6 - 9
require.NoError(t, s.Push(f3, 3, cb3)) // 3 - 10
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 10, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.True(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ----xxx====-------
// +++++
// =>
// ----+++====-----
t.Run("case 14", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6, cb2)) // 6 - 10
require.NoError(t, s.Push(f3, 3, cb3)) // 3 - 8
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f3[:3],
6: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 10, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.True(t, t3.WasCalled())
})
t.Run("case 14, for long frames", func(t *testing.T) {
s := newFrameSorter()
mult := protocol.ByteCount(math.Ceil(float64(protocol.MinStreamFrameSize) / 3))
f1 := getData(3 * mult)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4 * mult)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(5 * mult)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3*mult, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6*mult, cb2)) // 6 - 10
require.NoError(t, s.Push(f3, 3*mult, cb3)) // 3 - 8
checkQueue(t, s, map[protocol.ByteCount][]byte{
3 * mult: f3[:3*mult],
6 * mult: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3 * mult},
{Start: 10 * mult, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ----xxx===-------
// ++++++
// =>
// ----++++++-----
t.Run("case 15", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(3)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(6)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6, cb2)) // 6 - 9
require.NoError(t, s.Push(f3, 3, cb3)) // 3 - 9
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 9, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.True(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// ---xxxx-------
// ++++
// =>
// ---xxxx-----
t.Run("case 16", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(4)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 9
require.NoError(t, s.Push(f2, 5, cb2)) // 5 - 9
checkQueue(t, s, map[protocol.ByteCount][]byte{
5: f1,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 5},
{Start: 9, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
// ----xxx===-------
// +++
// =>
// ----xxx===-----
t.Run("case 17", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(3)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(3)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6, cb2)) // 6 - 9
require.NoError(t, s.Push(f3, 3, cb3)) // 3 - 6
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
6: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 9, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.True(t, t3.WasCalled())
})
// ---xxxx-------
// ++
// =>
// ---xxxx-----
t.Run("case 18", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(4)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(2)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 9
require.NoError(t, s.Push(f2, 5, cb2)) // 5 - 7
checkQueue(t, s, map[protocol.ByteCount][]byte{
5: f1,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 5},
{Start: 9, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
// ---xxxxx------
// ++
// =>
// ---xxxxx----
t.Run("case 19", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(5)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(2)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 10
checkQueue(t, s, map[protocol.ByteCount][]byte{
5: f1,
})
require.NoError(t, s.Push(f2, 6, cb2)) // 6 - 8
checkQueue(t, s, map[protocol.ByteCount][]byte{
5: f1,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 5},
{Start: 10, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
// xxxxx------
// ++
// =>
// xxxxx------
t.Run("case 20", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(10)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 0, cb1)) // 0 - 10
require.NoError(t, s.Push(f2, 5, cb2)) // 5 - 9
checkQueue(t, s, map[protocol.ByteCount][]byte{
0: f1,
})
checkGaps(t, s, []byteInterval{
{Start: 10, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
// ---xxxxx---
// +++
// =>
// ---xxxxx---
t.Run("case 21", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(5)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(3)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 10
require.NoError(t, s.Push(f2, 7, cb2)) // 7 - 10
checkGaps(t, s, []byteInterval{
{Start: 0, End: 5},
{Start: 10, End: protocol.MaxByteCount},
})
checkQueue(t, s, map[protocol.ByteCount][]byte{
5: f1,
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
})
// ----xxx------
// +++++
// =>
// --+++++----
t.Run("case 22", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(5)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 8
require.NoError(t, s.Push(f2, 3, cb2)) // 3 - 8
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 8, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// ----xxx===------
// ++++++++
// =>
// --++++++++----
t.Run("case 23", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(3)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(8)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 8
require.NoError(t, s.Push(f2, 8, cb2)) // 8 - 11
require.NoError(t, s.Push(f3, 3, cb3)) // 3 - 11
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 11, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.True(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// --xxx---===---
// ++++++
// =>
// --xxx++++++----
t.Run("case 24", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(3)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(6)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 9, cb2)) // 9 - 12
require.NoError(t, s.Push(f3, 6, cb3)) // 6 - 12
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
6: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 12, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})
// --xxx---===---###
// +++++++++
// =>
// --xxx+++++++++###
t.Run("case 25", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(3)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(3)
cb3, t3 := getFrameSorterTestCallback(t)
f4 := getData(9)
cb4, t4 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 9, cb2)) // 9 - 12
require.NoError(t, s.Push(f3, 15, cb3)) // 15 - 18
require.NoError(t, s.Push(f4, 6, cb4)) // 6 - 15
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f1,
6: f4,
15: f3,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 18, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.True(t, t2.WasCalled())
require.False(t, t3.WasCalled())
require.False(t, t4.WasCalled())
})
// ----xxx------
// +++++++
// =>
// --+++++++---
t.Run("case 26", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(10)
cb2, t2 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 5, cb1)) // 5 - 8
require.NoError(t, s.Push(f2, 3, cb2)) // 3 - 13
checkQueue(t, s, map[protocol.ByteCount][]byte{
3: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 3},
{Start: 13, End: protocol.MaxByteCount},
})
require.True(t, t1.WasCalled())
require.False(t, t2.WasCalled())
})
// ---xxx====---
// ++++
// =>
// --+xxx====---
t.Run("case 27", func(t *testing.T) {
s := newFrameSorter()
f1 := getData(3)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(4)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6, cb2)) // 6 - 10
require.NoError(t, s.Push(f3, 2, cb3)) // 2 - 6
checkQueue(t, s, map[protocol.ByteCount][]byte{
2: f3[:1],
3: f1,
6: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 2},
{Start: 10, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.True(t, t3.WasCalled())
})
t.Run("case 27, for long frames", func(t *testing.T) {
s := newFrameSorter()
const mult = protocol.MinStreamFrameSize
f1 := getData(3 * mult)
cb1, t1 := getFrameSorterTestCallback(t)
f2 := getData(4 * mult)
cb2, t2 := getFrameSorterTestCallback(t)
f3 := getData(4 * mult)
cb3, t3 := getFrameSorterTestCallback(t)
require.NoError(t, s.Push(f1, 3*mult, cb1)) // 3 - 6
require.NoError(t, s.Push(f2, 6*mult, cb2)) // 6 - 10
require.NoError(t, s.Push(f3, 2*mult, cb3)) // 2 - 6
checkQueue(t, s, map[protocol.ByteCount][]byte{
2 * mult: f3[:mult],
3 * mult: f1,
6 * mult: f2,
})
checkGaps(t, s, []byteInterval{
{Start: 0, End: 2 * mult},
{Start: 10 * mult, End: protocol.MaxByteCount},
})
require.False(t, t1.WasCalled())
require.False(t, t2.WasCalled())
require.False(t, t3.WasCalled())
})