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
|
package jitter
import (
"math/rand"
"testing"
"time"
)
func TestFull(t *testing.T) {
const seed = 0
const duration = time.Millisecond
generator := rand.New(rand.NewSource(seed))
transformation := Full(generator)
// Based on constant seed
expectedDurations := []time.Duration{165505, 393152, 995827, 197794, 376202}
for _, expected := range expectedDurations {
result := transformation(duration)
if result != expected {
t.Errorf("transformation expected to return a %s duration, but received %s instead", expected, result)
}
}
}
func TestEqual(t *testing.T) {
const seed = 0
const duration = time.Millisecond
generator := rand.New(rand.NewSource(seed))
transformation := Equal(generator)
// Based on constant seed
expectedDurations := []time.Duration{582752, 696576, 997913, 598897, 688101}
for _, expected := range expectedDurations {
result := transformation(duration)
if result != expected {
t.Errorf("transformation expected to return a %s duration, but received %s instead", expected, result)
}
}
}
func TestDeviation(t *testing.T) {
const seed = 0
const duration = time.Millisecond
const factor = 0.5
generator := rand.New(rand.NewSource(seed))
transformation := Deviation(generator, factor)
// Based on constant seed
expectedDurations := []time.Duration{665505, 893152, 1495827, 697794, 876202}
for _, expected := range expectedDurations {
result := transformation(duration)
if result != expected {
t.Errorf("transformation expected to return a %s duration, but received %s instead", expected, result)
}
}
}
func TestNormalDistribution(t *testing.T) {
const seed = 0
const duration = time.Millisecond
const standardDeviation = float64(duration / 2)
generator := rand.New(rand.NewSource(seed))
transformation := NormalDistribution(generator, standardDeviation)
// Based on constant seed
expectedDurations := []time.Duration{859207, 1285466, 153990, 1099811, 1959759}
for _, expected := range expectedDurations {
result := transformation(duration)
if result != expected {
t.Errorf("transformation expected to return a %s duration, but received %s instead", expected, result)
}
}
}
func TestFallbackNewRandom(t *testing.T) {
generator := rand.New(rand.NewSource(0))
if result := fallbackNewRandom(generator); generator != result {
t.Errorf("result expected to match parameter, received %+v instead", result)
}
if result := fallbackNewRandom(nil); result == nil {
t.Error("received unexpected nil result")
}
}
|
