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// Copyright 2012 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 signal
import (
"bytes"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"syscall"
"testing"
"time"
)
func sendCtrlBreak(t *testing.T, pid int) {
d, e := syscall.LoadDLL("kernel32.dll")
if e != nil {
t.Fatalf("LoadDLL: %v\n", e)
}
p, e := d.FindProc("GenerateConsoleCtrlEvent")
if e != nil {
t.Fatalf("FindProc: %v\n", e)
}
r, _, e := p.Call(syscall.CTRL_BREAK_EVENT, uintptr(pid))
if r == 0 {
t.Fatalf("GenerateConsoleCtrlEvent: %v\n", e)
}
}
func TestCtrlBreak(t *testing.T) {
// create source file
const source = `
package main
import (
"log"
"os"
"os/signal"
"time"
)
func main() {
c := make(chan os.Signal, 10)
signal.Notify(c)
select {
case s := <-c:
if s != os.Interrupt {
log.Fatalf("Wrong signal received: got %q, want %q\n", s, os.Interrupt)
}
case <-time.After(3 * time.Second):
log.Fatalf("Timeout waiting for Ctrl+Break\n")
}
}
`
tmp, err := ioutil.TempDir("", "TestCtrlBreak")
if err != nil {
t.Fatal("TempDir failed: ", err)
}
defer os.RemoveAll(tmp)
// write ctrlbreak.go
name := filepath.Join(tmp, "ctlbreak")
src := name + ".go"
f, err := os.Create(src)
if err != nil {
t.Fatalf("Failed to create %v: %v", src, err)
}
defer f.Close()
f.Write([]byte(source))
// compile it
exe := name + ".exe"
defer os.Remove(exe)
o, err := exec.Command("go", "build", "-o", exe, src).CombinedOutput()
if err != nil {
t.Fatalf("Failed to compile: %v\n%v", err, string(o))
}
// run it
cmd := exec.Command(exe)
var b bytes.Buffer
cmd.Stdout = &b
cmd.Stderr = &b
cmd.SysProcAttr = &syscall.SysProcAttr{
CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP,
}
err = cmd.Start()
if err != nil {
t.Fatalf("Start failed: %v", err)
}
go func() {
time.Sleep(1 * time.Second)
sendCtrlBreak(t, cmd.Process.Pid)
}()
err = cmd.Wait()
if err != nil {
t.Fatalf("Program exited with error: %v\n%v", err, string(b.Bytes()))
}
}
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