src/os/exec/exec_windows_test.go

// Copyright 2021 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.

//go:build windows
// +build windows

package exec_test

import (
	"io"
	"os"
	"strconv"
	"syscall"
	"testing"
)

func TestPipePassing(t *testing.T) {
	r, w, err := os.Pipe()
	if err != nil {
		t.Error(err)
	}
	const marker = "arrakis, dune, desert planet"
	childProc := helperCommand(t, "pipehandle", strconv.FormatUint(uint64(w.Fd()), 16), marker)
	childProc.SysProcAttr = &syscall.SysProcAttr{AdditionalInheritedHandles: []syscall.Handle{syscall.Handle(w.Fd())}}
	err = childProc.Start()
	if err != nil {
		t.Error(err)
	}
	w.Close()
	response, err := io.ReadAll(r)
	if err != nil {
		t.Error(err)
	}
	r.Close()
	if string(response) != marker {
		t.Errorf("got %q; want %q", string(response), marker)
	}
	err = childProc.Wait()
	if err != nil {
		t.Error(err)
	}
}