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
|
package tools
import (
"crypto/rand"
"encoding/json"
"errors"
mrand "math/rand"
"testing"
"time"
)
// ErrTimeout is returned if WaitFor/WaitForTimeout take longer than their timeout duration.
var ErrTimeout = errors.New("Timed out")
// WaitFor uses WaitForTimeout to poll a predicate function once per second to
// wait for a certain state to arrive, with a default timeout of 300 seconds.
func WaitFor(predicate func() (bool, error)) error {
return WaitForTimeout(predicate, 600*time.Second)
}
// WaitForTimeout polls a predicate function once per second to wait for a
// certain state to arrive, or until the given timeout is reached.
func WaitForTimeout(predicate func() (bool, error), timeout time.Duration) error {
startTime := time.Now()
for time.Since(startTime) < timeout {
time.Sleep(2 * time.Second)
satisfied, err := predicate()
if err != nil {
return err
}
if satisfied {
return nil
}
}
return ErrTimeout
}
// MakeNewPassword generates a new string that's guaranteed to be different than the given one.
func MakeNewPassword(oldPass string) string {
randomPassword := RandomString("", 16)
for randomPassword == oldPass {
randomPassword = RandomString("", 16)
}
return randomPassword
}
// RandomString generates a string of given length, but random content.
// All content will be within the ASCII graphic character set.
// (Implementation from Even Shaw's contribution on
// http://stackoverflow.com/questions/12771930/what-is-the-fastest-way-to-generate-a-long-random-string-in-go).
func RandomString(prefix string, n int) string {
const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
var bytes = make([]byte, n)
rand.Read(bytes)
for i, b := range bytes {
bytes[i] = alphanum[b%byte(len(alphanum))]
}
return prefix + string(bytes)
}
// RandomInt will return a random integer between a specified range.
func RandomInt(min, max int) int {
mrand.Seed(time.Now().Unix())
return mrand.Intn(max-min) + min
}
// Elide returns the first bit of its input string with a suffix of "..." if it's longer than
// a comfortable 40 characters.
func Elide(value string) string {
if len(value) > 40 {
return value[0:37] + "..."
}
return value
}
// PrintResource returns a resource as a readable structure
func PrintResource(t *testing.T, resource interface{}) {
b, _ := json.MarshalIndent(resource, "", " ")
t.Logf(string(b))
}
|
