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// Copyright 2017 Google LLC
//
// 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 gensupport
import (
"testing"
"time"
)
func TestBackoff(t *testing.T) {
eb := &ExponentialBackoff{Base: time.Millisecond, Max: time.Second}
var total time.Duration
for n, max := 0, 2*time.Millisecond; ; n, max = n+1, max*2 {
if n > 100 {
// There's less than 1 in 10^28 of taking longer than 100 iterations,
// so this is just to check we don't have an infinite loop.
t.Fatalf("Failed to timeout after 100 iterations.")
}
pause, retry := eb.Pause()
if !retry {
break
}
if 0 > pause || pause >= max {
t.Errorf("Iteration %d: pause = %v; want in range [0, %v)", n, pause, max)
}
total += pause
}
if total < time.Second {
t.Errorf("Total time = %v; want > %v", total, time.Second)
}
}
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