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package proxy
import (
"context"
"errors"
"io"
"strings"
"testing"
"time"
)
func TestTunnelWriteBufferRoundTripsAcrossWraparound(t *testing.T) {
t.Parallel()
b := newTunnelWriteBuffer(8)
payload := []byte("0123456789abcdefghij")
done := make(chan error, 1)
go func() {
_, err := b.Write(payload)
done <- err
_ = b.Close()
}()
got := make([]byte, 0, len(payload))
buf := make([]byte, 5)
for len(got) < len(payload) {
n, err := b.Read(buf)
got = append(got, buf[:n]...)
if err != nil {
t.Fatalf("Read returned error after %d bytes: %v", len(got), err)
}
}
if string(got) != string(payload) {
t.Fatalf("expected %q, got %q", payload, got)
}
if err := <-done; err != nil {
t.Fatalf("Write returned error: %v", err)
}
}
func TestTunnelWriteBufferWriteDoesNotBlockUntilFull(t *testing.T) {
t.Parallel()
b := newTunnelWriteBuffer(16)
done := make(chan struct{})
go func() {
defer close(done)
if _, err := b.Write([]byte("0123456789")); err != nil {
t.Errorf("Write returned error: %v", err)
}
}()
select {
case <-done:
case <-time.After(2 * time.Second):
t.Fatal("Write blocked even though the buffer had room")
}
}
func TestTunnelWriteBufferCloseKeepsBufferedDataReadable(t *testing.T) {
t.Parallel()
b := newTunnelWriteBuffer(16)
if _, err := b.Write([]byte("tail")); err != nil {
t.Fatalf("Write returned error: %v", err)
}
if err := b.Close(); err != nil {
t.Fatalf("Close returned error: %v", err)
}
buf := make([]byte, 8)
n, err := b.Read(buf)
if err != nil {
t.Fatalf("Read returned error: %v", err)
}
if string(buf[:n]) != "tail" {
t.Fatalf("expected buffered data to survive Close, got %q", buf[:n])
}
if _, err := b.Read(buf); !errors.Is(err, io.EOF) {
t.Fatalf("expected EOF once drained, got %v", err)
}
}
func TestTunnelWriteBufferFailReadUnblocksBlockedWriter(t *testing.T) {
t.Parallel()
b := newTunnelWriteBuffer(4)
errCh := make(chan error, 1)
go func() {
_, err := b.Write([]byte("far more than four bytes"))
errCh <- err
}()
// Let the writer fill the buffer and block on notFull.
time.Sleep(50 * time.Millisecond)
b.failRead(io.ErrClosedPipe)
select {
case err := <-errCh:
if !errors.Is(err, io.ErrClosedPipe) {
t.Fatalf("expected io.ErrClosedPipe, got %v", err)
}
case <-time.After(2 * time.Second):
t.Fatal("blocked writer was not released by failRead")
}
}
func TestTunnelConnCloseWriteClosesRequestBody(t *testing.T) {
t.Parallel()
reqBody := newTunnelWriteBuffer(defaultTunnelWriteBufSize)
conn := &tunnelConn{
reader: io.NopCloser(strings.NewReader("")),
writer: reqBody,
reqBody: reqBody,
name: "test-tunnel",
}
if err := conn.CloseWrite(); err != nil {
t.Fatalf("CloseWrite returned error: %v", err)
}
buf := make([]byte, 1)
if _, err := reqBody.Read(buf); !errors.Is(err, io.EOF) {
t.Fatalf("expected request body EOF after CloseWrite, got %v", err)
}
if err := conn.Close(); err != nil {
t.Fatalf("Close returned error: %v", err)
}
}
func TestTunnelConnCloseCancelsRequestContext(t *testing.T) {
t.Parallel()
ctx, cancel := context.WithCancel(context.Background())
conn := &tunnelConn{
reader: io.NopCloser(strings.NewReader("")),
writer: newTunnelWriteBuffer(defaultTunnelWriteBufSize),
cancel: cancel,
name: "test-tunnel",
}
if err := conn.Close(); err != nil {
t.Fatalf("Close returned error: %v", err)
}
select {
case <-ctx.Done():
case <-time.After(time.Second):
t.Fatal("expected Close to cancel request context")
}
}
func TestTunnelConnDeadlineUnsupported(t *testing.T) {
t.Parallel()
conn := &tunnelConn{}
if !errors.Is(conn.SetDeadline(time.Now()), errTunnelDeadline) {
t.Fatal("expected SetDeadline to report unsupported tunnel deadline")
}
if !errors.Is(conn.SetReadDeadline(time.Now()), errTunnelDeadline) {
t.Fatal("expected SetReadDeadline to report unsupported tunnel deadline")
}
if !errors.Is(conn.SetWriteDeadline(time.Now()), errTunnelDeadline) {
t.Fatal("expected SetWriteDeadline to report unsupported tunnel deadline")
}
}
arblant