// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test use of raw connections.
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// +build !plan9,!nacl,!js
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package os_test
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import (
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"os"
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"syscall"
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"testing"
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)
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func TestRawConnReadWrite(t *testing.T) {
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t.Parallel()
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r, w, err := os.Pipe()
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if err != nil {
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t.Fatal(err)
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}
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defer r.Close()
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defer w.Close()
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rconn, err := r.SyscallConn()
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if err != nil {
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t.Fatal(err)
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}
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wconn, err := w.SyscallConn()
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if err != nil {
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t.Fatal(err)
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}
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var operr error
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err = wconn.Write(func(s uintptr) bool {
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_, operr = syscall.Write(syscallDescriptor(s), []byte{'b'})
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return operr != syscall.EAGAIN
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})
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if err != nil {
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t.Fatal(err)
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}
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if operr != nil {
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t.Fatal(err)
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}
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var n int
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buf := make([]byte, 1)
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err = rconn.Read(func(s uintptr) bool {
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n, operr = syscall.Read(syscallDescriptor(s), buf)
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return operr != syscall.EAGAIN
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})
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if err != nil {
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t.Fatal(err)
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}
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if operr != nil {
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t.Fatal(operr)
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}
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if n != 1 {
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t.Errorf("read %d bytes, expected 1", n)
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}
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if buf[0] != 'b' {
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t.Errorf("read %q, expected %q", buf, "b")
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}
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}
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