summaryrefslogtreecommitdiffstats
path: root/vendor/gopkg.in/olivere/elastic.v5/backoff_test.go
blob: aba7dcf767cc5d351dbf7256f060298e1f7b661c (plain)
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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
package elastic

import (
	"math/rand"
	"testing"
	"time"
)

func TestZeroBackoff(t *testing.T) {
	b := ZeroBackoff{}
	_, ok := b.Next(0)
	if !ok {
		t.Fatalf("expected %v, got %v", true, ok)
	}
}

func TestStopBackoff(t *testing.T) {
	b := StopBackoff{}
	_, ok := b.Next(0)
	if ok {
		t.Fatalf("expected %v, got %v", false, ok)
	}
}

func TestConstantBackoff(t *testing.T) {
	b := NewConstantBackoff(time.Second)
	d, ok := b.Next(0)
	if !ok {
		t.Fatalf("expected %v, got %v", true, ok)
	}
	if d != time.Second {
		t.Fatalf("expected %v, got %v", time.Second, d)
	}
}

func TestSimpleBackoff(t *testing.T) {
	var tests = []struct {
		Duration time.Duration
		Continue bool
	}{
		// #0
		{
			Duration: 1 * time.Millisecond,
			Continue: true,
		},
		// #1
		{
			Duration: 2 * time.Millisecond,
			Continue: true,
		},
		// #2
		{
			Duration: 7 * time.Millisecond,
			Continue: true,
		},
		// #3
		{
			Duration: 0,
			Continue: false,
		},
		// #4
		{
			Duration: 0,
			Continue: false,
		},
	}

	b := NewSimpleBackoff(1, 2, 7)

	for i, tt := range tests {
		d, ok := b.Next(i)
		if got, want := ok, tt.Continue; got != want {
			t.Fatalf("#%d: expected %v, got %v", i, want, got)
		}
		if got, want := d, tt.Duration; got != want {
			t.Fatalf("#%d: expected %v, got %v", i, want, got)
		}
	}
}

func TestExponentialBackoff(t *testing.T) {
	rand.Seed(time.Now().UnixNano())

	min := time.Duration(8) * time.Millisecond
	max := time.Duration(256) * time.Millisecond
	b := NewExponentialBackoff(min, max)

	between := func(value time.Duration, a, b int) bool {
		x := int(value / time.Millisecond)
		return a <= x && x <= b
	}

	got, ok := b.Next(0)
	if !ok {
		t.Fatalf("expected %v, got %v", true, ok)
	}
	if !between(got, 8, 256) {
		t.Errorf("expected [%v..%v], got %v", 8, 256, got)
	}

	got, ok = b.Next(1)
	if !ok {
		t.Fatalf("expected %v, got %v", true, ok)
	}
	if !between(got, 8, 256) {
		t.Errorf("expected [%v..%v], got %v", 8, 256, got)
	}

	got, ok = b.Next(2)
	if !ok {
		t.Fatalf("expected %v, got %v", true, ok)
	}
	if !between(got, 8, 256) {
		t.Errorf("expected [%v..%v], got %v", 8, 256, got)
	}

	got, ok = b.Next(3)
	if !ok {
		t.Fatalf("expected %v, got %v", true, ok)
	}
	if !between(got, 8, 256) {
		t.Errorf("expected [%v..%v], got %v", 8, 256, got)
	}

	got, ok = b.Next(4)
	if !ok {
		t.Fatalf("expected %v, got %v", true, ok)
	}
	if !between(got, 8, 256) {
		t.Errorf("expected [%v..%v], got %v", 8, 256, got)
	}

	got, ok = b.Next(5)
	if ok {
		t.Fatalf("expected %v, got %v", false, ok)
	}

	got, ok = b.Next(6)
	if ok {
		t.Fatalf("expected %v, got %v", false, ok)
	}
}