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// +build acceptance common
package tools
import (
"crypto/rand"
"errors"
mrand "math/rand"
"os"
"time"
"github.com/rackspace/gophercloud"
)
// ErrTimeout is returned if WaitFor takes longer than 300 second to happen.
var ErrTimeout = errors.New("Timed out")
// OnlyRS overrides the default Gophercloud behavior of using OS_-prefixed environment variables
// if RS_ variables aren't present. Otherwise, they'll stomp over each other here in the acceptance
// tests, where you need to have both defined.
func OnlyRS(original gophercloud.AuthOptions) gophercloud.AuthOptions {
if os.Getenv("RS_AUTH_URL") == "" {
original.IdentityEndpoint = ""
}
if os.Getenv("RS_USERNAME") == "" {
original.Username = ""
}
if os.Getenv("RS_PASSWORD") == "" {
original.Password = ""
}
if os.Getenv("RS_API_KEY") == "" {
original.APIKey = ""
}
return original
}
// WaitFor polls a predicate function once per second to wait for a certain state to arrive.
func WaitFor(predicate func() (bool, error)) error {
for i := 0; i < 300; i++ {
time.Sleep(1 * 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
}
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