mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-03 07:40:28 +08:00
98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
// Copyright 2022 Gravitational, Inc
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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 interval
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import (
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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// TestIntervalReset verifies the basic behavior of the interval reset functionality.
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// Since time based tests tend to be flaky, this test passes if it has a >50% success
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// rate (i.e. >50% of resets seemed to have actually extended the timer successfully).
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func TestIntervalReset(t *testing.T) {
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const iterations = 1_000
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const duration = time.Millisecond * 666
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t.Parallel()
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var success, failure atomic.Uint64
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var wg sync.WaitGroup
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for i := 0; i < iterations; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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resetTimer := time.NewTimer(duration / 3)
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defer resetTimer.Stop()
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interval := New(Config{
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Duration: duration,
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})
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defer interval.Stop()
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start := time.Now()
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for i := 0; i < 6; i++ {
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select {
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case <-interval.Next():
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failure.Add(1)
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return
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case <-resetTimer.C:
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interval.Reset()
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resetTimer.Reset(duration / 3)
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}
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}
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<-interval.Next()
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elapsed := time.Since(start)
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// we expect this test to produce elapsed times of
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// 3*duration if it is working properly. we accept a
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// margin or error of +/- 1 duration in order to
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// minimize flakiness.
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if elapsed > duration*2 && elapsed < duration*4 {
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success.Add(1)
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} else {
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failure.Add(1)
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}
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}()
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}
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wg.Wait()
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require.Greater(t, success.Load(), failure.Load())
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}
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func TestNewNoop(t *testing.T) {
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t.Parallel()
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i := NewNoop()
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ch := i.Next()
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select {
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case <-ch:
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t.Fatalf("noop should not emit anything")
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default:
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}
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i.Stop()
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select {
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case <-ch:
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t.Fatalf("noop should not emit anything")
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default:
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}
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}
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