mirror of https://github.com/restic/restic.git
138 lines
3.8 KiB
Go
138 lines
3.8 KiB
Go
// This tests WatchdogReader
|
|
|
|
package swift
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"io/ioutil"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
// Uses testReader from timeout_reader_test.go
|
|
|
|
func testWatchdogReaderTimeout(t *testing.T, initialTimeout, watchdogTimeout time.Duration, expectedTimeout bool) {
|
|
test := newTestReader(3, 10*time.Millisecond)
|
|
timer, firedChan := setupTimer(initialTimeout)
|
|
wr := newWatchdogReader(test, watchdogTimeout, timer)
|
|
b, err := ioutil.ReadAll(wr)
|
|
if err != nil || string(b) != "AAA" {
|
|
t.Fatalf("Bad read %s %s", err, b)
|
|
}
|
|
checkTimer(t, firedChan, expectedTimeout)
|
|
}
|
|
|
|
func setupTimer(initialTimeout time.Duration) (timer *time.Timer, fired <-chan bool) {
|
|
timer = time.NewTimer(initialTimeout)
|
|
firedChan := make(chan bool)
|
|
started := make(chan bool)
|
|
go func() {
|
|
started <- true
|
|
select {
|
|
case <-timer.C:
|
|
firedChan <- true
|
|
}
|
|
}()
|
|
<-started
|
|
return timer, firedChan
|
|
}
|
|
|
|
func checkTimer(t *testing.T, firedChan <-chan bool, expectedTimeout bool) {
|
|
fired := false
|
|
select {
|
|
case fired = <-firedChan:
|
|
default:
|
|
}
|
|
if expectedTimeout {
|
|
if !fired {
|
|
t.Fatal("Timer should have fired")
|
|
}
|
|
} else {
|
|
if fired {
|
|
t.Fatal("Timer should not have fired")
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestWatchdogReaderNoTimeout(t *testing.T) {
|
|
testWatchdogReaderTimeout(t, 100*time.Millisecond, 100*time.Millisecond, false)
|
|
}
|
|
|
|
func TestWatchdogReaderTimeout(t *testing.T) {
|
|
testWatchdogReaderTimeout(t, 5*time.Millisecond, 5*time.Millisecond, true)
|
|
}
|
|
|
|
func TestWatchdogReaderNoTimeoutShortInitial(t *testing.T) {
|
|
testWatchdogReaderTimeout(t, 5*time.Millisecond, 100*time.Millisecond, false)
|
|
}
|
|
|
|
func TestWatchdogReaderTimeoutLongInitial(t *testing.T) {
|
|
testWatchdogReaderTimeout(t, 100*time.Millisecond, 5*time.Millisecond, true)
|
|
}
|
|
|
|
//slowReader simulates reading from a slow network connection by introducing a delay
|
|
//in each Read() proportional to the amount of bytes read.
|
|
type slowReader struct {
|
|
reader io.Reader
|
|
delayPerByte time.Duration
|
|
}
|
|
|
|
func (r *slowReader) Read(p []byte) (n int, err error) {
|
|
n, err = r.reader.Read(p)
|
|
if n > 0 {
|
|
time.Sleep(time.Duration(n) * r.delayPerByte)
|
|
}
|
|
return
|
|
}
|
|
|
|
//This test verifies that the watchdogReader's timeout is not triggered by data
|
|
//that comes in very slowly. (It should only be triggered if no data arrives at
|
|
//all.)
|
|
func TestWatchdogReaderOnSlowNetwork(t *testing.T) {
|
|
byteString := make([]byte, 8*watchdogChunkSize)
|
|
reader := &slowReader{
|
|
reader: bytes.NewReader(byteString),
|
|
//reading everything at once would take 100 ms, which is longer than the
|
|
//watchdog timeout below
|
|
delayPerByte: 200 * time.Millisecond / time.Duration(len(byteString)),
|
|
}
|
|
|
|
timer, firedChan := setupTimer(10 * time.Millisecond)
|
|
wr := newWatchdogReader(reader, 190*time.Millisecond, timer)
|
|
|
|
//use io.ReadFull instead of ioutil.ReadAll here because ReadAll already does
|
|
//some chunking that would keep this testcase from failing
|
|
b := make([]byte, len(byteString))
|
|
n, err := io.ReadFull(wr, b)
|
|
if err != nil || n != len(b) || !bytes.Equal(b, byteString) {
|
|
t.Fatalf("Bad read %s %d", err, n)
|
|
}
|
|
|
|
checkTimer(t, firedChan, false)
|
|
}
|
|
|
|
//This test verifies that the watchdogReader's chunking logic does not mess up
|
|
//the byte strings that are read.
|
|
func TestWatchdogReaderValidity(t *testing.T) {
|
|
byteString := []byte("abcdefghij")
|
|
//make a reader with a non-standard chunk size (1 MiB would be much too huge
|
|
//to comfortably look at the bytestring that comes out of the reader)
|
|
wr := &watchdogReader{
|
|
reader: bytes.NewReader(byteString),
|
|
chunkSize: 3, //len(byteString) % chunkSize != 0 to be extra rude :)
|
|
//don't care about the timeout stuff here
|
|
timeout: 5 * time.Minute,
|
|
timer: time.NewTimer(5 * time.Minute),
|
|
}
|
|
|
|
b := make([]byte, len(byteString))
|
|
n, err := io.ReadFull(wr, b)
|
|
if err != nil || n != len(b) {
|
|
t.Fatalf("Read error: %s", err)
|
|
}
|
|
if !bytes.Equal(b, byteString) {
|
|
t.Fatalf("Bad read: %#v != %#v", string(b), string(byteString))
|
|
}
|
|
}
|