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package pktline
import (
"bytes"
"context"
"io"
"os"
"strings"
"testing"
"time"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/gitaly/v14/internal/testhelper"
)
func TestReadMonitorTimeout(t *testing.T) {
waitPipeR, waitPipeW := io.Pipe()
defer waitPipeW.Close()
ctx, cancel := testhelper.Context()
defer cancel()
in := io.MultiReader(
strings.NewReader("000ftest string"),
waitPipeR, // this pipe reader lets us block the multi reader
)
r, monitor, err := NewReadMonitor(ctx, in)
require.NoError(t, err)
startTime := time.Now()
go monitor.Monitor(PktDone(), 10*time.Millisecond, cancel)
// We should be done quickly
<-ctx.Done()
elapsed := time.Since(startTime)
require.Error(t, ctx.Err())
require.Equal(t, ctx.Err(), context.Canceled)
require.True(t, elapsed < time.Second, "Expected context to be cancelled quickly, but it was not")
// Verify that pipe is closed
_, err = io.ReadAll(r)
require.Error(t, err)
require.IsType(t, &os.PathError{}, err)
}
func TestReadMonitorSuccess(t *testing.T) {
waitPipeR, waitPipeW := io.Pipe()
ctx, cancel := testhelper.Context()
defer cancel()
preTimeoutPayload := "000ftest string"
postTimeoutPayload := "0017post-timeout string"
in := io.MultiReader(
strings.NewReader(preTimeoutPayload),
bytes.NewReader(PktFlush()),
waitPipeR, // this pipe reader lets us block the multi reader
strings.NewReader(postTimeoutPayload),
)
r, monitor, err := NewReadMonitor(ctx, in)
require.NoError(t, err)
go monitor.Monitor(PktFlush(), 10*time.Millisecond, cancel)
// Verify the data is passed through correctly
scanner := NewScanner(r)
require.True(t, scanner.Scan())
require.Equal(t, preTimeoutPayload, scanner.Text())
require.True(t, scanner.Scan())
require.Equal(t, PktFlush(), scanner.Bytes())
// If the timeout *has* been stopped, a wait this long won't break it
time.Sleep(100 * time.Millisecond)
// Close the pipe to skip to next reader
require.NoError(t, waitPipeW.Close())
// Verify that more data can be sent through the pipe
require.True(t, scanner.Scan())
require.Equal(t, postTimeoutPayload, scanner.Text())
require.NoError(t, ctx.Err())
}
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