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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package poll_test
import (
"fmt"
"io/fs"
"net"
"os"
"testing"
"time"
)
func TestReadError(t *testing.T) {
t.Run("ErrNotPollable", func(t *testing.T) {
f, err := badStateFile()
if err != nil {
t.Skip(err)
}
defer f.Close()
// Give scheduler a chance to have two separated
// goroutines: an event poller and an event waiter.
time.Sleep(100 * time.Millisecond)
var b [1]byte
_, err = f.Read(b[:])
if perr := parseReadError(err, isBadStateFileError); perr != nil {
t.Fatal(perr)
}
})
}
func parseReadError(nestedErr error, verify func(error) (string, bool)) error {
err := nestedErr
if nerr, ok := err.(*net.OpError); ok {
err = nerr.Err
}
if nerr, ok := err.(*fs.PathError); ok {
err = nerr.Err
}
if nerr, ok := err.(*os.SyscallError); ok {
err = nerr.Err
}
if s, ok := verify(err); !ok {
return fmt.Errorf("got %v; want %s", nestedErr, s)
}
return nil
}