100 lines
2.3 KiB
Go
100 lines
2.3 KiB
Go
package timers
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import (
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"sync"
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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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// waitTimer waits for a timer to fire or a timeout, returning true if fired.
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func waitTimer(tm *time.Timer, timeout time.Duration) bool {
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select {
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case <-tm.C:
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return true
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case <-time.After(timeout):
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return false
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}
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}
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func TestTimersReliable(t *testing.T) {
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t.Run("acquire timer does not fire immediately", func(t *testing.T) {
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tm := AcquireTimer(50 * time.Millisecond)
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require.NotNil(t, tm)
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fired := waitTimer(tm, 10*time.Millisecond)
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require.False(t, fired, "timer should not have fired immediately")
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ReleaseTimer(tm)
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})
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t.Run("timer fires after duration", func(t *testing.T) {
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tm := AcquireTimer(20 * time.Millisecond)
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require.NotNil(t, tm)
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fired := waitTimer(tm, 100*time.Millisecond)
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require.True(t, fired, "timer did not fire as expected")
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ReleaseTimer(tm)
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})
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t.Run("release stops timer", func(t *testing.T) {
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tm := AcquireTimer(50 * time.Millisecond)
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require.NotNil(t, tm)
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ReleaseTimer(tm)
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fired := waitTimer(tm, 60*time.Millisecond)
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require.False(t, fired, "timer should have been stopped")
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})
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t.Run("reuse timer from pool", func(t *testing.T) {
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// Acquire and release a timer to populate the pool
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tm1 := AcquireTimer(50 * time.Millisecond)
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ReleaseTimer(tm1)
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// Acquire again from pool
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tm2 := AcquireTimer(20 * time.Millisecond)
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require.NotNil(t, tm2)
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fired := waitTimer(tm2, 100*time.Millisecond)
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require.True(t, fired, "reused timer should have fired")
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ReleaseTimer(tm2)
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})
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t.Run("concurrent acquire and release", func(t *testing.T) {
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var wg sync.WaitGroup
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numGoroutines := 50
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wg.Add(numGoroutines)
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for i := 0; i < numGoroutines; i++ {
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go func() {
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defer wg.Done()
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tm := AcquireTimer(10 * time.Millisecond)
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// deterministically wait for timer to fire or grace period
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waitTimer(tm, 20*time.Millisecond)
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ReleaseTimer(tm)
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}()
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}
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wg.Wait()
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})
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t.Run("release timer that already fired", func(t *testing.T) {
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tm := AcquireTimer(10 * time.Millisecond)
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require.NotNil(t, tm)
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fired := waitTimer(tm, 50*time.Millisecond)
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require.True(t, fired, "timer should have fired")
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ReleaseTimer(tm)
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// Acquire again to ensure pool is working
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tm2 := AcquireTimer(20 * time.Millisecond)
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require.NotNil(t, tm2)
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ReleaseTimer(tm2)
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})
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}
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