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137 lines
3.0 KiB
137 lines
3.0 KiB
package common
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import (
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"math/rand"
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"sync"
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"testing"
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"time"
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"github.com/fortytw2/leaktest"
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"github.com/stretchr/testify/assert"
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)
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func TestDefaultTicker(t *testing.T) {
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ticker := defaultTickerMaker(time.Millisecond * 10)
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<-ticker.Chan()
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ticker.Stop()
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}
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func TestRepeatTimer(t *testing.T) {
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ch := make(chan time.Time, 100)
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mtx := new(sync.Mutex)
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// tick() fires from start to end
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// (exclusive) in milliseconds with incr.
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// It locks on mtx, so subsequent calls
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// run in series.
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tick := func(startMs, endMs, incrMs time.Duration) {
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mtx.Lock()
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go func() {
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for tMs := startMs; tMs < endMs; tMs += incrMs {
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lt := time.Time{}
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lt = lt.Add(tMs * time.Millisecond)
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ch <- lt
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}
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mtx.Unlock()
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}()
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}
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// tock consumes Ticker.Chan() events and checks them against the ms in "timesMs".
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tock := func(t *testing.T, rt *RepeatTimer, timesMs []int64) {
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// Check against timesMs.
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for _, timeMs := range timesMs {
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tyme := <-rt.Chan()
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sinceMs := tyme.Sub(time.Time{}) / time.Millisecond
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assert.Equal(t, timeMs, int64(sinceMs))
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}
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// TODO detect number of running
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// goroutines to ensure that
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// no other times will fire.
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// See https://github.com/tendermint/tendermint/libs/issues/120.
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time.Sleep(time.Millisecond * 100)
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done := true
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select {
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case <-rt.Chan():
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done = false
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default:
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}
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assert.True(t, done)
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}
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tm := NewLogicalTickerMaker(ch)
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rt := NewRepeatTimerWithTickerMaker("bar", time.Second, tm)
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/* NOTE: Useful for debugging deadlocks...
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go func() {
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time.Sleep(time.Second * 3)
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trace := make([]byte, 102400)
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count := runtime.Stack(trace, true)
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fmt.Printf("Stack of %d bytes: %s\n", count, trace)
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}()
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*/
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tick(0, 1000, 10)
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tock(t, rt, []int64{})
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tick(1000, 2000, 10)
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tock(t, rt, []int64{1000})
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tick(2005, 5000, 10)
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tock(t, rt, []int64{2005, 3005, 4005})
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tick(5001, 5999, 1)
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// Read 5005 instead of 5001 because
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// it's 1 second greater than 4005.
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tock(t, rt, []int64{5005})
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tick(6000, 7005, 1)
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tock(t, rt, []int64{6005})
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tick(7033, 8032, 1)
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tock(t, rt, []int64{7033})
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// After a reset, nothing happens
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// until two ticks are received.
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rt.Reset()
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tock(t, rt, []int64{})
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tick(8040, 8041, 1)
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tock(t, rt, []int64{})
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tick(9555, 9556, 1)
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tock(t, rt, []int64{9555})
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// After a stop, nothing more is sent.
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rt.Stop()
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tock(t, rt, []int64{})
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// Another stop panics.
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assert.Panics(t, func() { rt.Stop() })
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}
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func TestRepeatTimerReset(t *testing.T) {
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// check that we are not leaking any go-routines
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defer leaktest.Check(t)()
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timer := NewRepeatTimer("test", 20*time.Millisecond)
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defer timer.Stop()
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// test we don't receive tick before duration ms.
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select {
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case <-timer.Chan():
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t.Fatal("did not expect to receive tick")
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default:
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}
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timer.Reset()
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// test we receive tick after Reset is called
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select {
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case <-timer.Chan():
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// all good
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case <-time.After(40 * time.Millisecond):
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t.Fatal("expected to receive tick after reset")
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}
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// just random calls
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for i := 0; i < 100; i++ {
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time.Sleep(time.Duration(rand.Intn(40)) * time.Millisecond)
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timer.Reset()
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}
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}
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