executor/sequential_test.go at master · rodaine/executor · 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
68
69
70
71
72
73
74
75
76
77
78
package executor

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestSequential(t *testing.T) {
	t.Parallel()

	seq := Sequential{}

	t.Run("success", func(t *testing.T) {
		t.Parallel()

		buf := new(bytes.Buffer)

		n := 10
		actions := make([]Action, n)
		for i := 0; i < n; i++ {
			x := i
			actions[i] = ActionFunc(func(ctx context.Context) error {
				fmt.Fprint(buf, x)
				return nil
			})
		}

		err := seq.Execute(context.Background(), actions...)
		assert.NoError(t, err)
		assert.Equal(t, "0123456789", buf.String())
	})

	t.Run("error", func(t *testing.T) {
		t.Parallel()

		ct := 0

		addToCt := ActionFunc(func(ctx context.Context) error {
			ct++
			return nil
		})

		actions := []Action{
			addToCt,
			ActionFunc(func(ctx context.Context) error { return errors.New("some error") }),
			addToCt,
		}

		err := seq.Execute(context.Background(), actions...)
		assert.Error(t, err)
		assert.Equal(t, 1, ct)
	})

	t.Run("cancelled", func(t *testing.T) {
		t.Parallel()

		ct := 0

		addToCt := ActionFunc(func(ctx context.Context) error {
			ct++
			return nil
		})

		actions := []Action{addToCt, addToCt, addToCt}

		ctx, cancel := context.WithCancel(context.Background())
		cancel()

		err := seq.Execute(ctx, actions...)
		assert.Equal(t, context.Canceled, err)
		assert.Zero(t, ct)
	})
}