gexec/group_test.go at master · SimonRichardson/gexec · GitHub

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
65
66
67
package gexec

import (
	"errors"
	"testing"
	"time"
)

func TestZero(t *testing.T) {
	var g Group

	res := make(chan error)
	go func() { res <- g.Run() }()

	select {
	case err := <-res:
		if err != nil {
			t.Errorf("%v", err)
		}
	case <-time.After(100 * time.Millisecond):
		t.Error("timeout")
	}
}

func TestOne(t *testing.T) {
	var (
		g Group

		myError = errors.New("foobar")
		res     = make(chan error)
	)

	g.Add(func() error { return myError }, func(error) {})
	go func() { res <- g.Run() }()

	select {
	case err := <-res:
		if expected, actual := myError, err; expected != actual {
			t.Errorf("expected: %v, actual: %v", expected, actual)
		}
	case <-time.After(100 * time.Millisecond):
		t.Error("timeout")
	}
}

func TestMany(t *testing.T) {
	var (
		g Group

		interrupt = errors.New("interrupt")
		cancel    = make(chan struct{})
		res       = make(chan error)
	)

	g.Add(func() error { return interrupt }, func(error) {})
	g.Add(func() error { <-cancel; return nil }, func(error) { close(cancel) })
	go func() { res <- g.Run() }()

	select {
	case err := <-res:
		if expected, actual := interrupt, err; expected != actual {
			t.Errorf("expected: %v, actual: %v", expected, actual)
		}
	case <-time.After(100 * time.Millisecond):
		t.Error("timeout")
	}
}