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47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
// Copyright 2017 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gensupport
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import (
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"testing"
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"time"
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)
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func TestBackoff(t *testing.T) {
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eb := &ExponentialBackoff{Base: time.Millisecond, Max: time.Second}
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var total time.Duration
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for n, max := 0, 2*time.Millisecond; ; n, max = n+1, max*2 {
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if n > 100 {
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// There's less than 1 in 10^28 of taking longer than 100 iterations,
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// so this is just to check we don't have an infinite loop.
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t.Fatalf("Failed to timeout after 100 iterations.")
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}
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pause, retry := eb.Pause()
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if !retry {
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break
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}
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if 0 > pause || pause >= max {
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t.Errorf("Iteration %d: pause = %v; want in range [0, %v)", n, pause, max)
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}
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total += pause
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}
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if total < time.Second {
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t.Errorf("Total time = %v; want > %v", total, time.Second)
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}
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}
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