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// Copyright (c) The go-grpc-middleware Authors.
// Licensed under the Apache License 2.0.
package retry
import (
"context"
"testing"
"time"
)
func TestBackoffExponentialWithJitter(t *testing.T) {
scalar := 100 * time.Millisecond
jitterFrac := 0.10
backoffFunc := BackoffExponentialWithJitter(scalar, jitterFrac)
// use 64 so we are past number of attempts where exponentBase2 would overflow
for i := 0; i < 64; i++ {
waitFor := backoffFunc(nil, uint(i))
if waitFor < 0 {
t.Errorf("BackoffExponentialWithJitter(%d) = %d; want >= 0", i, waitFor)
}
}
}
func TestBackoffExponentialWithJitterBounded(t *testing.T) {
scalar := 100 * time.Millisecond
jitterFrac := 0.10
maxBound := 10 * time.Second
backoff := BackoffExponentialWithJitterBounded(scalar, jitterFrac, maxBound)
// use 64 so we are past number of attempts where exponentBase2 would overflow
for i := 0; i < 64; i++ {
waitFor := backoff(context.Background(), uint(i))
if waitFor > maxBound {
t.Fatalf("expected dur to be less than %v, got %v for %d", maxBound, waitFor, i)
}
if waitFor < 0 {
t.Fatalf("expected dur to be greater than 0, got %v for %d", waitFor, i)
}
}
}
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