forked from TrueCloudLab/restic
62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
/*
|
|
Copyright 2017 Google Inc. All Rights Reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package spanner
|
|
|
|
import (
|
|
"math"
|
|
"time"
|
|
|
|
"testing"
|
|
)
|
|
|
|
// Test if exponential backoff helper can produce correct series of
|
|
// retry delays.
|
|
func TestBackoff(t *testing.T) {
|
|
b := exponentialBackoff{minBackoff, maxBackoff}
|
|
tests := []struct {
|
|
retries int
|
|
min time.Duration
|
|
max time.Duration
|
|
}{
|
|
{
|
|
retries: 0,
|
|
min: minBackoff,
|
|
max: minBackoff,
|
|
},
|
|
{
|
|
retries: 1,
|
|
min: minBackoff,
|
|
max: time.Duration(rate * float64(minBackoff)),
|
|
},
|
|
{
|
|
retries: 3,
|
|
min: time.Duration(math.Pow(rate, 3) * (1 - jitter) * float64(minBackoff)),
|
|
max: time.Duration(math.Pow(rate, 3) * float64(minBackoff)),
|
|
},
|
|
{
|
|
retries: 1000,
|
|
min: time.Duration((1 - jitter) * float64(maxBackoff)),
|
|
max: maxBackoff,
|
|
},
|
|
}
|
|
for _, test := range tests {
|
|
got := b.delay(test.retries)
|
|
if float64(got) < float64(test.min) || float64(got) > float64(test.max) {
|
|
t.Errorf("delay(%v) = %v, want in range [%v, %v]", test.retries, got, test.min, test.max)
|
|
}
|
|
}
|
|
}
|