func TestTryMutexLocker(t *testing.T) {
var mu syncx.TryMutex
var l sync.Locker = &mu
l.Lock()
ch := make(chan struct{})
go func() {
l.Lock()
ch <- struct{}{}
}()
runtime.Gosched()
if mu.TryLock() {
t.Fatal("mu should be locked")
}
l.Unlock()
<-ch
l.Unlock()
if !mu.TryLock() {
t.Fatal("mu should be unlocked")
}
}
func TestTryMutex(t *testing.T) {
var mu syncx.TryMutex
if !mu.TryLock() {
t.Fatal("expected TryLock to work")
}
wait := make(chan struct{})
go func() {
for i := 0; i < 2; i++ {
if mu.TryLock() {
t.Fatal("expected TryLock to fail")
}
}
wait <- struct{}{}
}()
<-wait
mu.Unlock()
if !mu.TryLock() {
t.Fatal("expected TryLock to work")
}
mu.Unlock()
defer func() {
err := recover()
if err == nil {
t.Fatal("expected Unlock to panic")
}
t.Logf("got %T %q", err, err)
}()
mu.Unlock()
}