traefik/pkg/job/job_test.go

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package job
import (
"testing"
"time"
2019-08-03 01:58:23 +00:00
"github.com/cenkalti/backoff/v3"
)
func TestJobBackOff(t *testing.T) {
var (
testInitialInterval = 500 * time.Millisecond
testRandomizationFactor = 0.1
testMultiplier = 2.0
testMaxInterval = 5 * time.Second
testMinJobInterval = 1 * time.Second
)
exp := NewBackOff(backoff.NewExponentialBackOff())
exp.InitialInterval = testInitialInterval
exp.RandomizationFactor = testRandomizationFactor
exp.Multiplier = testMultiplier
exp.MaxInterval = testMaxInterval
exp.MinJobInterval = testMinJobInterval
exp.Reset()
var expectedResults = []time.Duration{500, 500, 500, 1000, 2000, 4000, 5000, 5000, 500, 1000, 2000, 4000, 5000, 5000}
for i, d := range expectedResults {
expectedResults[i] = d * time.Millisecond
}
for i, expected := range expectedResults {
// Assert that the next backoff falls in the expected range.
var minInterval = expected - time.Duration(testRandomizationFactor*float64(expected))
var maxInterval = expected + time.Duration(testRandomizationFactor*float64(expected))
if i < 3 || i == 8 {
time.Sleep(2 * time.Second)
}
var actualInterval = exp.NextBackOff()
if !(minInterval <= actualInterval && actualInterval <= maxInterval) {
t.Error("error")
}
}
}