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package quic
import (
"testing"
"github.com/quic-go/quic-go/internal/protocol"
"github.com/quic-go/quic-go/internal/qerr"
"github.com/quic-go/quic-go/internal/wire"
"github.com/stretchr/testify/require"
)
func TestCryptoStreamDataAssembly(t *testing.T) {
str := newCryptoStream()
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("bar"), Offset: 3}))
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("foo")}))
// receive a retransmission
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("bar"), Offset: 3}))
var data []byte
for {
b := str.GetCryptoData()
if b == nil {
break
}
data = append(data, b...)
}
require.Equal(t, []byte("foobar"), data)
}
func TestCryptoStreamMaxOffset(t *testing.T) {
str := newCryptoStream()
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{
Offset: protocol.MaxCryptoStreamOffset - 5,
Data: []byte("foo"),
}))
require.ErrorIs(t,
str.HandleCryptoFrame(&wire.CryptoFrame{
Offset: protocol.MaxCryptoStreamOffset - 2,
Data: []byte("bar"),
}),
&qerr.TransportError{ErrorCode: qerr.CryptoBufferExceeded},
)
}
func TestCryptoStreamFinishWithQueuedData(t *testing.T) {
t.Run("with data at current offset", func(t *testing.T) {
str := newCryptoStream()
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("foo")}))
require.Equal(t, []byte("foo"), str.GetCryptoData())
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("bar"), Offset: 3}))
require.ErrorIs(t, str.Finish(), &qerr.TransportError{ErrorCode: qerr.ProtocolViolation})
})
t.Run("with data at a higher offset", func(t *testing.T) {
str := newCryptoStream()
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("foobar"), Offset: 20}))
require.ErrorIs(t, str.Finish(), &qerr.TransportError{ErrorCode: qerr.ProtocolViolation})
})
}
func TestCryptoStreamReceiveDataAfterFinish(t *testing.T) {
str := newCryptoStream()
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("foobar")}))
require.Equal(t, []byte("foobar"), str.GetCryptoData())
require.NoError(t, str.Finish())
// receiving a retransmission is ok
require.NoError(t, str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("bar"), Offset: 3}))
// but receiving new data is not
require.ErrorIs(t,
str.HandleCryptoFrame(&wire.CryptoFrame{Data: []byte("baz"), Offset: 4}),
&qerr.TransportError{ErrorCode: qerr.ProtocolViolation},
)
}
func TestCryptoStreamWrite(t *testing.T) {
expectedCryptoFrameLen := func(offset protocol.ByteCount) protocol.ByteCount {
f := &wire.CryptoFrame{Offset: offset}
return f.Length(protocol.Version1)
}
str := newCryptoStream()
require.False(t, str.HasData())
_, err := str.Write([]byte("foo"))
require.NoError(t, err)
require.True(t, str.HasData())
_, err = str.Write([]byte("bar"))
require.NoError(t, err)
_, err = str.Write([]byte("baz"))
require.NoError(t, err)
require.True(t, str.HasData())
f := str.PopCryptoFrame(expectedCryptoFrameLen(0) + 3)
require.Equal(t, &wire.CryptoFrame{Data: []byte("foo")}, f)
require.True(t, str.HasData())
f = str.PopCryptoFrame(protocol.MaxByteCount)
// the two write calls were coalesced into a single frame
require.Equal(t, &wire.CryptoFrame{Offset: 3, Data: []byte("barbaz")}, f)
require.False(t, str.HasData())
}
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