/
pollfd_test.go
229 lines (211 loc) · 4.78 KB
/
pollfd_test.go
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package pollfd
import (
"runtime"
"syscall"
"testing"
"time"
)
// !! ATTENTION !! We unconditionally delete this file !!
const fifo = "/tmp/pollfd-test-fifo"
func mkfifo(t *testing.T) {
_ = syscall.Unlink(fifo)
err := syscall.Mkfifo(fifo, 0666)
if err != nil {
t.Fatal("mkfifo:", err)
}
}
func TestIsError(t *testing.T) {
if !IsErrorTemporary(ErrTimeout) {
t.Fatal("ErrTimeout not temporary!")
}
if !IsErrorTimeout(ErrTimeout) {
t.Fatal("ErrTimeout not timeout!")
}
if !IsErrorTemporary(syscall.Errno(syscall.EINTR)) {
t.Fatal("EINTR not temporary!")
}
if IsErrorTimeout(syscall.Errno(syscall.EINTR)) {
t.Fatal("EINTR is timeout!")
}
if IsErrorTemporary(ErrClosing) {
t.Fatal("ErrClosing is temporary!")
}
if IsErrorTimeout(ErrClosing) {
t.Fatal("ErrClosing is timeout!")
}
if IsErrorTemporary(syscall.Errno(syscall.EFAULT)) {
t.Fatal("EFAULT is temporary!")
}
if IsErrorTimeout(syscall.Errno(syscall.EFAULT)) {
t.Fatal("EFAULT is timeout!")
}
}
func TestOpenClose(t *testing.T) {
// /dev/null should be non-pollable
_, err := Open("/dev/null", O_RO)
if err == nil {
t.Fatal("Sucessfully opened /dev/null!!")
}
// make and open FIFO
mkfifo(t)
fd, err := Open(fifo, O_RO)
if err != nil {
t.Fatal("Open:", err)
}
if fd.Name() != fifo {
t.Fatal("fd.Name: ", fd.Name())
}
err = fd.Close()
if err != nil {
t.Fatal("Close:", err)
}
}
func TestReadWrite(t *testing.T) {
var b = make([]byte, 100)
mkfifo(t)
// Open read-end of pipe
fdr, err := Open(fifo, O_RO)
if err != nil {
t.Fatal("Open read-side:", err)
}
// Open write-end of pipe
fdw, err := Open(fifo, O_WO)
if err != nil {
t.Fatal("Open write-side:", err)
}
// Cause read-timeout
err = fdr.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
if err != nil {
t.Fatal("SetReadDeadline:", err)
}
_, err = fdr.Read(b)
if err != ErrTimeout {
t.Fatal("Expected:", ErrTimeout, "- Got:", err)
}
// Cause write timeout (after filling fifo buffer)
err = fdw.SetWriteDeadline(time.Now().Add(1 * time.Second))
if err != nil {
t.Fatal("SetWriteDeadline:", err)
}
nw := 0
// must be large enough to fill fifo buffer
for i := 0; i < 1024*200; i++ {
var n int
n, err = fdw.Write([]byte("0123456789abcdef"))
nw += n
if err != nil {
break
}
}
if err != ErrTimeout {
t.Fatal("Expected:", ErrTimeout, "- Got:", err)
}
// Read data in fifo buffer
err = fdr.SetReadDeadline(time.Now().Add(1 * time.Second))
if err != nil {
t.Fatal("SetReadDeadline:", err)
}
for {
nr := nw
if nr > cap(b) {
nr = cap(b)
}
n, err := fdr.Read(b[:nr])
if err != nil {
t.Fatal("Read:", err, nw)
}
nw -= n
if nw == 0 {
break
}
}
// Try to read more and get a timeout
err = fdr.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
if err != nil {
t.Fatal("SetReadDeadline:", err)
}
_, err = fdr.Read(b[:1])
if err != ErrTimeout {
t.Fatal("Expected:", ErrTimeout, "- Got:", err)
}
done := make(chan bool)
go func() {
err = fdr.SetReadDeadline(time.Now().Add(1 * time.Second))
if err != nil {
done <- true
t.Fatal("SetReadDeadline:", err)
}
_, err = fdr.Read(b[:1])
if err != ErrClosing {
done <- true
t.Fatal("Expected:", ErrClosing, "- Got:", err)
}
done <- true
}()
time.Sleep(500 * time.Millisecond)
fdr.Close()
<-done
// Re-open read-end of pipe
fdr, err = Open(fifo, O_RO)
if err != nil {
t.Fatal("Open read-side:", err)
}
// Test finalizer
fdr = nil
runtime.GC()
time.Sleep(200 * time.Millisecond)
err = fdw.SetWriteDeadline(time.Now().Add(100 * time.Millisecond))
if err != nil {
t.Fatal("SetWriteDeadline", err)
}
_, err = fdw.Write([]byte("01234567890abcdef"))
if err != syscall.EPIPE {
t.Fatal("Expected:", syscall.EPIPE, "- Got:", err)
}
// Close write-end and test Incref
fdw.Close()
err = fdw.Incref()
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, "- Got:", err)
}
}
func TestClosed(t *testing.T) {
mkfifo(t)
fdr, err := Open(fifo, O_RO)
if err != nil {
t.Fatal("Open:", err)
}
err = fdr.Close()
if err != nil {
t.Fatal("Close:", err)
}
err = fdr.Close()
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, " - Got:", err)
}
b := make([]byte, 10)
_, err = fdr.Read(b)
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, " - Got:", err)
}
_, err = fdr.Write(b)
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, " - Got:", err)
}
err = fdr.SetReadDeadline(time.Time{})
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, " - Got:", err)
}
err = fdr.SetWriteDeadline(time.Time{})
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, " - Got:", err)
}
err = fdr.SetDeadline(time.Time{})
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, " - Got:", err)
}
err = fdr.Incref()
if err != ErrClosing {
t.Fatal("Expected:", ErrClosing, " - Got:", err)
}
}