1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
//
// Copyright 2014-2023 Cristian Maglie. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//
// Testing code idea and fix thanks to @angri
// https://github.com/bugst/go-serial/pull/42
package serial
import (
"context"
"os/exec"
"testing"
"time"
"github.com/stretchr/testify/require"
)
func startSocatAndWaitForPort(t *testing.T, ctx context.Context) *exec.Cmd {
cmd := exec.CommandContext(ctx, "socat", "-D", "STDIO", "pty,link=/tmp/faketty")
r, err := cmd.StderrPipe()
require.NoError(t, err)
require.NoError(t, cmd.Start())
// Let our fake serial port node appear.
// socat will write to stderr before starting transfer phase;
// we don't really care what, just that it did, because then it's ready.
buf := make([]byte, 1024)
_, err = r.Read(buf)
require.NoError(t, err)
return cmd
}
func TestSerialReadAndCloseConcurrency(t *testing.T) {
// Run this test with race detector to actually test that
// the correct multitasking behaviour is happening.
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
cmd := startSocatAndWaitForPort(t, ctx)
go cmd.Wait()
port, err := Open("/tmp/faketty", &Mode{})
require.NoError(t, err)
buf := make([]byte, 100)
go port.Read(buf)
// let port.Read to start
time.Sleep(time.Millisecond * 1)
port.Close()
}
func TestDoubleCloseIsNoop(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
cmd := startSocatAndWaitForPort(t, ctx)
go cmd.Wait()
port, err := Open("/tmp/faketty", &Mode{})
require.NoError(t, err)
require.NoError(t, port.Close())
require.NoError(t, port.Close())
}
|
