ceremonyclient/go-libp2p/p2p/transport/quicreuse/tracer_test.go

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package quicreuse
import (
"bytes"
"io"
"os"
"strings"
"testing"
"github.com/klauspost/compress/zstd"
"github.com/quic-go/quic-go"
"github.com/quic-go/quic-go/logging"
"github.com/stretchr/testify/require"
)
func createLogDir(t *testing.T) string {
dir, err := os.MkdirTemp("", "libp2p-quic-transport-test")
require.NoError(t, err)
t.Cleanup(func() { os.RemoveAll(dir) })
return dir
}
func getFile(t *testing.T, dir string) os.FileInfo {
files, err := os.ReadDir(dir)
require.NoError(t, err)
require.Len(t, files, 1)
info, err := files[0].Info()
require.NoError(t, err)
return info
}
func TestSaveQlog(t *testing.T) {
qlogDir := createLogDir(t)
logger := newQlogger(qlogDir, logging.PerspectiveServer, quic.ConnectionIDFromBytes([]byte{0xde, 0xad, 0xbe, 0xef}))
file := getFile(t, qlogDir)
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require.Equal(t, ".", string(file.Name()[0]))
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require.Truef(t, strings.HasSuffix(file.Name(), ".qlog.swp"), "expected %s to have the .qlog.swp file ending", file.Name())
// close the logger. This should move the file.
require.NoError(t, logger.Close())
file = getFile(t, qlogDir)
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require.NotEqual(t, ".", string(file.Name()[0]))
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require.Truef(t, strings.HasSuffix(file.Name(), ".qlog.zst"), "expected %s to have the .qlog.zst file ending", file.Name())
require.Contains(t, file.Name(), "server")
require.Contains(t, file.Name(), "deadbeef")
}
func TestQlogBuffering(t *testing.T) {
qlogDir := createLogDir(t)
logger := newQlogger(qlogDir, logging.PerspectiveServer, quic.ConnectionIDFromBytes([]byte("connid")))
initialSize := getFile(t, qlogDir).Size()
// Do a small write.
// Since the writter is buffered, this should not be written to disk yet.
logger.Write([]byte("foobar"))
require.Equal(t, getFile(t, qlogDir).Size(), initialSize)
// Close the logger. This should flush the buffer to disk.
require.NoError(t, logger.Close())
finalSize := getFile(t, qlogDir).Size()
t.Logf("initial log file size: %d, final log file size: %d\n", initialSize, finalSize)
require.Greater(t, finalSize, initialSize)
}
func TestQlogCompression(t *testing.T) {
qlogDir := createLogDir(t)
logger := newQlogger(qlogDir, logging.PerspectiveServer, quic.ConnectionIDFromBytes([]byte("connid")))
logger.Write([]byte("foobar"))
require.NoError(t, logger.Close())
compressed, err := os.ReadFile(qlogDir + "/" + getFile(t, qlogDir).Name())
require.NoError(t, err)
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require.NotEqual(t, "foobar", compressed)
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c, err := zstd.NewReader(bytes.NewReader(compressed))
require.NoError(t, err)
data, err := io.ReadAll(c)
require.NoError(t, err)
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require.Equal(t, []byte("foobar"), data)
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}