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// +build linux
package fifo
import (
"io/ioutil"
"os"
"path/filepath"
"sync"
"syscall"
"testing"
"time"
"github.com/stretchr/testify/assert"
"golang.org/x/net/context"
)
func TestFifoCloseAfterRm(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "fifos")
assert.NoError(t, err)
defer os.RemoveAll(tmpdir)
leakCheckWg = &sync.WaitGroup{}
defer func() {
leakCheckWg = nil
}()
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
f, err := OpenFifo(ctx, filepath.Join(tmpdir, "f0"), syscall.O_RDONLY|syscall.O_CREAT|syscall.O_NONBLOCK, 0600)
assert.NoError(t, err)
err = os.RemoveAll(filepath.Join(tmpdir, "f0"))
assert.NoError(t, err)
cerr := make(chan error)
go func() {
b := make([]byte, 32)
_, err := f.Read(b)
cerr <- err
}()
select {
case err := <-cerr:
t.Fatalf("read should have blocked, but got %v", err)
case <-time.After(500 * time.Millisecond):
}
err = f.Close()
assert.NoError(t, err)
select {
case err := <-cerr:
assert.EqualError(t, err, "reading from a closed fifo")
case <-time.After(500 * time.Millisecond):
t.Fatal("read should have been unblocked")
}
assert.NoError(t, checkWgDone(leakCheckWg))
cancel()
ctx, cancel = context.WithCancel(context.Background())
cerr = make(chan error)
go func() {
_, err = OpenFifo(ctx, filepath.Join(tmpdir, "f1"), syscall.O_WRONLY|syscall.O_CREAT, 0600)
cerr <- err
}()
select {
case err := <-cerr:
t.Fatalf("open should have blocked, but got %v", err)
case <-time.After(500 * time.Millisecond):
}
err = os.RemoveAll(filepath.Join(tmpdir, "f1"))
cancel()
select {
case err := <-cerr:
assert.EqualError(t, err, "context canceled")
case <-time.After(500 * time.Millisecond):
t.Fatal("open should have been unblocked")
}
assert.NoError(t, checkWgDone(leakCheckWg))
}
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