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package sync_test
import (
"testing"
"github.com/stretchr/testify/require"
tmsync "github.com/tendermint/tendermint/libs/sync"
)
func TestWaker(t *testing.T) {
// A new waker should block when sleeping.
waker := tmsync.NewWaker()
select {
case <-waker.Sleep():
require.Fail(t, "unexpected wakeup")
default:
}
// Wakeups should not block, and should cause the next sleeper to awaken.
waker.Wake()
select {
case <-waker.Sleep():
default:
require.Fail(t, "expected wakeup, but sleeping instead")
}
// Multiple wakeups should only wake a single sleeper.
waker.Wake()
waker.Wake()
waker.Wake()
select {
case <-waker.Sleep():
default:
require.Fail(t, "expected wakeup, but sleeping instead")
}
select {
case <-waker.Sleep():
require.Fail(t, "unexpected wakeup")
default:
}
}